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ASYNCHRONOUS COMMUNICATIONS ADAPTOR/MODEM 2200-401 

SEPTEMBER 20, 1972 



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COPYRIGHT © 1973 BY DATAPOINT CORPORATION 



bAT APOINT- COKPORSTIOlSr 
PRODUCT SPECIFICATION 

September 20, 1972 
ASYNCHRONOUS COMMUNICATIONS ADAPTOR/MODEM 2200-401 



1.0 GENERAL DESCRIPTION 
2,0 SYSTEM REQUIREMENTS 

2.1 Datapoint 2200 

2.2 Telephone Network 
3.0 TECHNICAL DESCRIPTION 

3.1 General 

3.2 Programming 

3.2.1 Device Address 

3.2.2 Status 

3.2.3 Data Input 

3.2.4 COMl Cc^mnand 

3.2.5 COM2, COM3 Commands 

3.2.6 COM4 Command 

3.2.7 EX WRITE Command 

3.3 Technical Specification Summary 
4.0 PHYSICAL DESCRIPTION 

5,0 ENVIRONMENTAL REQUIREMENTS 
6.0 INTERFACE REQUIREMENTS 

6.1 Datapoint 2200 Processor Interface 

6.2 DAA Interface 
7.0 OPTIONS 

7.1 Address Selection 

7.2 Multi-Unit Installation 

7.3 External RS-232 Device 
8.0 PARTS LIST 



2200-401 - 9/20/72 Page 1 of 21 



1.0 GENERAL DESCRIPTION 



The 2200-401 Asynchronous Communications Adaptor, 
consisting of a communications interface and integral 
low-speed modem, provides the Datapoint 2200 user the 
capability of binary, serial, asynchronous data 
communication over the switched (DDD) telephone network or 
dedicated (leased) telephone circuits. 



The Adaptor accomplishes the conversion between the 
internal parallel input/output bus data used by the 
processor and serial start/stop data in the form of 
frequency-shift keyed tones used for communication over 
telephone lines. The frequencies used for transmission and 
reception make the unit compatible with modems of the Bell 
System 103 series. 



The 2200-401 is capable of full-duplex operation 
(simultaneous transmission and reception) at data rates to 
300 baud. 



Character formats and data rates for transmission and 
reception are completely under program control, as are the 
automatic dialing and answering operations and selection of 
operating mode ('Originate* or 'Answer'). 



2.0 SYSTEM REQUIREMENTS 

2.1 Datapoint 2200 



The 2200-401 operates with either Version I or Version 
II Datapoint 2200 processors of any memory size. A maximum 
of two adaptor devices such as the 2200-401 may be connected 
to the input/output bus, since units of this type are 
supplied power from the Datapoint 2200. Provisions for 
power and physical housing for more than two devices are 
available. 



2 , 2 Telephone Network 



Due to the relatively narrow-band transmission 
characteristics of the 2200-401, four-wire telephone 
circuits are not required for full-duplex operation. For 
this reason, the 2200-401 telephone line interface is two- 

2200-401 - 9/20/72 Page 2 of 21 



wire only. For connection to the switched telephone 
network, a Data Access Arrangement (DAA) is required. The 
2200-401 is designed to operate with the Bell System lOOlB 
(CBT), 58118, or equivalent DAA. The DAA should be installed 
without a power supply since the 2200-401 supplies power for 
the unit. 



For multi-point (polled) cononunication systems or in 
cases where continuous operation is intended, dedicated 
(leased) two-wire telephone circuits are used. These 
circuits may be type 3002 (unconditioned) for data rates to 
300 baud. 



3.0 TECHNICAL DESCRIPTION 

3.1 General 



Aside from the automatic dialing and answering 
functions performed by the 2200-401, its main functions are 
data transmission and reception. These functions are 
depicted in basic form in Figure 1. 



3,1.1 Transmission 



A character transferr^ from the 2200 processor via the 
input/output bus to the Adaptor is first placed in the 
Transmit Character Buffer. It is then transferred to the 
Serial Transmit Register, where start and stop bit(s) are 
appended to the character and conversion to bit serial form 
occurs. 



If a character is presently being processed by the 
Serial Transmit Register, the next character remains in the 
Transmit Character Buffer until processing is completed. 
The output of the Serial Transmit Register (Transmit Data) 
is applied to the modem transmitter, where it controls the 
frequency of the tone transmitted on the telephone line. If 
the modem is in the * Originate' mode, the state of this line 
keys the transmitted frequency between 1270 Hz ("mark* or 
•1') and 1070 Hz ('space or '0'). If the modem is in the 
'Answer' mode, the tone is keyed between 2225 Hz ('mark' or 
'1') and 2025 Hz ('space' or '0'). 



The modem receiver accepts the telephone line signal 
which is a combination of tones received from the distant 



2200-401 - 9/20/72 Page 3 of 21 



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SERIAL TRANSMIT 
REGISTER 



TRANSMIT DATA 



SERIAL BINARY 
START-STOP DATA 



MODEM 
TRANSMITTER 



TRANSMIT CHARACTER 
BUFFER 



A- Register 
Output 



U 



SERIAL RECEXVE 
REGISTER 



RECEIVE DATA 



-"SBRIAir BiNARY ~^" 
START-STOP DATA 



MODEM 
RECEIVER 



Frequency Shift 
Keyed Tones 



< 
< 



Telephone 
Line Pair 



Frequency Shift 
Keyed Tones 



±z. 



RECEIVE CHARACTER 
BUFFER 



*d A-Register y^ 
,S Input \- 



o 

Hi 
to 



FIGURE 1: 2200-40X BASIC FUNCTIONAL DIAGRAM 



2200-401. The receiver then rejects the local transmiter 
tones and converts tones received from the distant modem 
into serial, binary data. This serial data line (Received 
Data) is applied to the Serial Receive Register, where the 
start and stop bits are stripped and each character is 
assembled into parallel form. Following this assembly, the 
character is transferred to the Receive Character Buffer, 
where it awaits transfer to the 2200 processor via the 

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3 • 2 Programming 



Figure 2 shows the programming interface for the 
2200-401, showing sources and destinations of all input, 
output and command operations. 



3.2,1 Device Address 



Each device connected to the 2200 processor 
input/output bus is assigned a unique address, allowing the 
processor to selectively communicate with each device while 
only that device is addressed. The 2200-401 is factory- 
wired with an address of 322 (octal) but this strapped 
address may be modified if required. 

The 2200-401 is addressed by the program by setting the 
A- register to 322 (octal) and executing an EX ADR 
instruction. 



3.2.2 Status 



After addressing the 2200-401, execution of an INPUT 
instruction loads the 2200-401 status into the A^register of 
the processor. Status word bit assignments are as follows: 



2200-401 - f/2|f/72 Page 5 of 21 



A-Register 
Output 



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^ 



^ 



^ 



TRANSMIT CHARACTER 
BUFFER 



TRANSMIT TIME BASE 
REGISTER 
16 BITS 



TRANSMIT. CEARACTER 
LENGTH REGISTER 
4 BITS 



(Includes output 
control bit) 



RECEIVE TIME BASE 
REGISTER 
16 BITS 



RECEIVE CHARACTER 
LENGTH REGISTER 
3 BITS 



COMMAND REGISTER 
8 BITS 



(WRITE) 



(COM3) 



(COM4) 



(COM2) 



(COM4) 



(COMl) 



A-Register 
Input 









RECEIVE CHARACTER 
BUFFER 
8 BITS 








A 






<. 








N 






STATUS 
8 BITS 















(INPUT) 



(STATUS) 



FIGUPxE 2: 2200-4@l FROGRAI®fi:NG INTERFACE 



2200-401 - 9/20/72 



Page 6 of 21 



3 2 



^ Transmit Ready 



Receive Ready 



Break Received 



Clear to Send (CTS) 



Not Used 



Ringing Present 



Carrier Present 
(CAR) 



Data Coupler Ready 
(DCR) 



Description of Status Bits: 



Bit " Transmit Ready 

The true (1) state of this bit indicates that the 
transmit character buffer is empty and can accept another 
character for transmission. When a new character is 
accepted by the 2200-401 for transmission the Transmit Ready 
bit goes false (0) until that character is transferred to 
the serial transmit register. Characters should not be 
transferred to the 2200-401 unless the Transmit Ready bit is 
true. 



Bit 1 - Receive Ready 

The true (1) condition of this bit indicates that the 
receive character buffer is full (a character has been 
received) . If the 2200 processor does not read the 
character prior to reception of a new character, the new 
character will move into the receive buffer, destroying the 
previous character. After execution of an INPUT instruction 
while in data mode, the Receive Ready bit will go false (0) 
until another character is received. 



2200-401 - 9/20/72 



Page 7 of 21 



Bit 2 - Break Received 

The true (1) state of this bit indicates that the 

Receive Data Line from the modem receiver has been in the 

'space' (0) state for more than one character time. 



Bit 3 - Clear- to--Send (CTS) 

The true (1) condition of this bit indicates that the 
2200-401 modem is prepared to accept data for transmission. 
Data should not be transferred from the processor to the 
2200-401 unless this bit is true. Further discussion of the 
CTS status bit is found in Section 3.2.4. , 'Originate/ Answer 
Bit'. 



Bit 4 - Not Used 



Bit 5 - Ringing Present 

The true (1) condition of this bit indicates that the 
Data Access Arrangement has detected a ringing signal on the 
telephone line. This bit is true during the ringing portion 
of a ring cycle (approximately 1 to 2 seconds) and false (0) 
during the remainder of the ring cycle (2 to 4 seconds) . 



Bit 6 - Carrier Present ■* (CAR) 

The true (1) condition 6i this bit indicates that the 
modem receiver has been receiving valid carrier tones from 
the distant modem for at least 200 milliseconds. The CAR 
bit returns to the false state if valid tones are not 
received for any period exceeding 12 milliseconds. 



The Receive Data line from the modem receiver is forced 
to the true ('mark') state when CAR is false, to prevent 
assembly of characters in the absence of valid received 
carrier tones due to random telephone line noise. 



Bit 7 - Data Coupler Re^y (PCR) 

T) When originating a call the true (1) condition of 
this bit indicates that a dial tone is present and the 
dialing operation may proceed; during dialing, this bit is 
false. Following dialing this bit returns to the true 
condition after a 2 to 5 second delay (this does not 
necessarily indicate that the called station has answered) . 



2) After answering a call, the true condition of this 
bit indicates that the modem is connected to the telephone 
line tlirough the Data Access Arrangement. 



2200-401 - 9/20/72 Page 8 of 21 



3,2.3 Data Input 

Addressing the 2200-401 and executing the EX DATA 
instruction places the Adaptor in data mode and execution of 
an INPUT instruction then transfers the character in the 
receive character buffer into the processor A-register. 
Execution of this data transfer sets the status word Receive 
Ready bit false until a new character is received. In order 
to read 2200-401 status following the data transfer, it is 
necessary to re-address the Adaptor or execute an EX STATUS 
instruction while the Adaptor is addressed to return to 
status mode. 



3.2.4 COMl Command 

Execution of the EX COMl instruction while the 2200-401 
is addressed causes the 8-bit command register in the 
2200-401 to be loaded with the contents of the processor 
A-register. The following is a description of the function 
of each command register bit: 



2200-401 - 9/20/72 Page S of 21 






COMl 



-Request to Send 
(RTS) 



Invert Received 
Serial Data Line 



Not Used 



^Invert Transmitted 

"~~lSerial Data Line 



Off -Hook 



-Not Used 



— Originate/ Answer 
(0/A) 



Send Dial Pulses 



B it - Request to Send (RTS) 

A true (1) bit in this position conditions the internal 
modem for transmission using the frequency pair determined 
by the Originate/Answer Command Register bit. RTS should be 
set true after the DCR (Data Coupler Ready) status bit comes 
true either after completion of a dialing operation or after 
answering an incoming call, and should be left in the true 
state for the duration of the connection. 

At the end of the connection, after the last character 
has been transferred from the processor to the 2200-401, the 
connection should not be terminated until time has been 
allowed for the character to be processed and transmitted. 
This time may be as long as two character times (at the baud 
rate in use) plus approximately 5 milliseconds. 

Bit 1 - Invert Received Serial Data 

A true (1) bit in this position causes inversion of the 

Received Data line between the internal modem and the Serial 

Receive Register. This bit is normally set false (0) unless 



2200-401 - 9/20/72 



Page 10 of 21 



.nverted data is being received from the distant modem. 
Bit 2 - Not Used 



Bit 3 - Invert Transmitted Serial Data 

A true (1) bit in this position causes inversion of the 
Transmit Data line between the Serial Transmit Register and 
the internal modem transmitter. This bit is normally set 
false except during a dialing operation. 

Bit 4 - Off Hook 

A true (1) bit in this position initializes and 
maintains a connection between the 2200-401 and the switched 
telephone network through the DAA, Resetting this bit to the 
false state causes the DAA to terminate (hang up) the 
connection. 



Bit 5 - Not Used 

Bit 6 - Originate/Answer iO/^) 

A true (1) bit in this position places the internal 
2200-401 modem in 'Originate' mode. The modem is in the 
'Answer' mode when this bit is false. 



Frequency pairs for transmission and reception are 
controlled by the state of the 0/A bit. When 0/A is true 
(and RTS is true) , the 1070 - 1270 Hz pair is used for 
transmission and the 2025 - 2225 Hz pair is used for 
reception. When 0/A is false, these pairs are reversed. 

After completion of a dialing operation, the 0/A and 
RTS bits should be set true, indicating that a connection 
has been established. The modem is not transmitting at this 
time and the GTS status bit is false. After answering, the 
distant modem begins transmission of its 2225 Hz 'mark' tone 
for approximately 2 seconds. Presence of this tone alone on 
the telephone line is required to discUsle any echo 
suppressors which may be present on the circuit. When this 
tone has been received for approximately 200 millilseconds, 
the CAR status bit comes true and the modem begins a 1.5 
second timeout during which no transmission occurs. At the 
end of the 1.5 second period, the modem transmits the 1270 
Hz 'mark' tone for 250 milliseconds. At the end of this 
time, the GTS status bit comes true. The modem is now ready 
for transmission of data. At the completion of the call, 
the u/A and RTS bits should be returned to the false state. 



2200-401 - 9/20/72 Page 11 of 21 



When answering a call, the 0/A bit should be left in 
the false state (Answer Mode) <. RTS should be set true after 
the call has been answered and the DCR status bit has come 
true. Setting the RTS bit initiates the 2 second period of 
2225 Hz 'mark' tone transmission described above. The CTS 
status bit is false before and during this period, coming 
true at tiie end of the 2 seconds. The modem is now ready 
for transmission of data. Near the end of the 2 second 
period, the CAR status bit comes true, after the modem has 
detected the 1270 Hz 'mark' tone from the originating end. 
At the completion of the call, the RTS bit is set false. 



Bit 7 - Send Dial Pulses 

A true (1) bit in this position places the 2200-401 in 
automatic dialing mode. In dialing mode, the transmit 
character buffer and serial transmit register are used for 
the generation of dial pulses to be applied to the Data 
Access Arrangement. The dialing operation proceeds as 
follows: After the 'Off-Hook' command register bit has been 
set false for a period of time sufficient to insure that any 
previous connection is terminated (usually 2 to 5 seconds) , 
'Off- Hook' is set true, causing the DAA to go off-hook. 
After a delay sufficient to acquire a dial tone (the DCR 
status bit may be used for this purpose since it comes true 
2 to 5 seconds after ' Off-Hook » is set true, but does not 
actually reflect presence of dial tone), the 'Invert 
Transmit' and 'Send Dial Pulses' command register bits are 
set true. When ttie DCR status bit returns false, the DAA is 
ready to accept dial pulses. The digits of the dial number 
are generated by transmission of the character 340 (octal) a 
number of times corresponding to the digit, i.e., the digit 
'5' is dialed by transmission of five 340 characters. 
Following a delay of at least 600 milliseconds, the next 
digit may be dialed. The transmission rate for this 
operation is 100 bits/second and the transmit character 
format is 1 start bit, 8 data bits, and 1 stop bit. 
Following the dialing operation, the 'Send Dial Pulses' and 
the 'Invert Transmit' command register bits should again be 
set false. 



3,2.5 COM2, COM3 Commands 

The COM2 and COM3 commands are used, respectively, to 
set the 2200-401 receive and transmit time base registers. 
These two sixteen bit registers determine the receive and 
transmit bit rates. These rates are independent, allowing 
data transmission and reception at different rates. Given a 
bit rate (bps) the following formula is used to determine 
the time base number, N, to be entered into the transmit or 
receive registers 



2200-401 - 9/20/72 Page 12 of 21 



N = 65,536 - 76,800 
Epi 



This number N can be converted to a 16-bit binary number and 
divided into two 8-bit words. Th first COM2 (COM3) 
instruction executed after addressing the 2200-401 transfers 
the contents of the processor A- register into the most 
significant 8 bits of the receive (transmit) time base 
register and the following COM2 (COM3) executed transfers 
the A- register contents to the 8 least significant bits of 
the receive (transmit) time base register. 



The octal codes for some frequently used rates are 
listed below: 



TII4E BASE TABLE 

RECEIVE EX COM2 EX COM2 

TRANSMIT EX COM3 EX COM3 

BAUD RATE 1ST MASK WORD 2nd MASK WORD 

100 375 (Dialing) 000 

110 375 106 

220 376 243 

150 376 000 

300 377 000 

3.2,6 COM4 Command 



Execution of the EX COM4 inatruction after addressing 
the 2200-401 transfers the contents of the processor 
A- register to the character length register of the 2200-401, 
The contents of this register determine the transmit and 
receive character lengths and number of stop bits. 



2200-401 - 9/20/72 Page 13 of 21 



COM4 



Transmit Character 
Length Mask 



Receive Character 
Length Mask 



Output Control 



Unas signed 



22QQt4Q1 t 9/20/72 



Page 14 of 21 



The following tables describe the functions of the mask 
bits: 



TRANSMITTED CHARACTER LENGTH MASK BITS 



MASK 

POSITION 

210 


START 
UNITS 


INFORMATION 
UNITS 


STOP 
UNITS 


A- REGISTER 
CODE BIT 
POSITIONS 
76543210 


000 
001 
010 
Oil 
100 


1 
1 
1 
1 
1 


8 
8 
7 
6 
5 


1 
2 
1 
1 
1 


87654321 

87654321 

7654321 

654321 

54321 


101 


- 


- 


- 


— • 


110 


- 


- 


— 


—— 


111 


- 


- 


— 


— — 



RECEIVED CHARACTER LENGTH MASK BITS 



MASK BIT 
POSITION 
543 



START INFORMATION STOP 
UNITS UNITS UNITS 



A-REGISTER 
CODE BIT 
POSITIONS 
7654321 



000 
001 
010 

oil 

100 
101 
110 

111 



1 or more 
1 or more 
1 or more 
1 or more 
1 or more 



87654321 
87654321 
7654321X 
654321XX 
54321XXX 



When cocies having 5, 6, or 7 information units are to 
be transmitted, the remaining high-order bits in the 
character byte must be coded to 1. 

When a two-unit stop pulse is required for characters 
having 5, 6, or 7 information bits, the next larger 
character length is used; the remaining high-order bits (all 
coded 1) form the stop pulses. 



2200-401 - 9/20/72 



Piage 15 of 21 



When received characters contain 5, 6, or 7 information 
bits, the remaining low-order bits (as shown above) must be 
disregarded. 

Bit 6, Output Control, determines whether characters 
transferred from the 2200 processor to the 2200-401 (when 
not in dialing mode) are transmitted by the itKDdem or are 
transmitted to an attached RS-232 output device such as the 
Datapoint 3300-200 Thermal Printer, Bit 6 is set true (1) 
during periods of transmission of data to the RS-232 device 
and is set false (0) otherwise. 



3.2.7 EX WRITE Command 

Execution of the EX WRITE instruction after addressing 
the 2200-401 transfers the contents of the processor 
A- register to the Transmit Character Buffer. This transfer 
resets tlie status word Transmit Ready bit until the 
character is transferred to the Serial Transmit Register. EX 
WRITE is used to output characters to the 2200-401 for 
transmission by the modem over the telephone line, to an 
attached RS-232 receive-only device or to the DAA (for use 
as dial pulses) . 



3.3 Technical Specifications Summary 



Data Rates 

(Programmable transmit and receive) Up to 300 
bits/second. 



Data Format 

Serial, Asynchronous? 1 start bit, 5 to 8 data bits, 
and 1 or 2 stop bits per character (programmable transmit 
and receive) . 



Data Modulation Method 

Frequency Shift Keying. Frequency Assignments 
( no n- inverted) : 



ORIGINATE MODE ANSWER MODE 

MARFTn SPhd^k (0) MARK 115 SPACE (0) 



Transmit 1270 Hz 1070 Hz 2225 Hz 2025 Hz 
Receive 2225 Hz 2025 Hz 1270 Hz 1070 Hz 



2200-401 - 9/20/72 iiM 2.^ of 21 



Telephone Line Interface 

Transformer coupled 600 ohms resistive (2-wire) . 

Telephone Line Requirement 

Switched Network with Bell System lOOlB (CBT) Data 
Access Arrangement or Type 3002 unconditioned 2-wire leased 
line. 



Operating Mode 

Full duplex (simultaneous transmit and receive) . 

Transmit Level 

Odbm to -12dbm continuously adjustable. 



Receive Level 

+4dbm to -•40dbm, no adjustment required. 



Clear to Send Delay (from Request- to-Send true) 
Originate mode: 1.75 seconds following detection of 

2225 Hz tone 

Answer mode: 2 seconds. 



Carrier Detect Delay 

Acquisition time: 2*00 milliseconds; Release (drop) 
time: 12 milliseconds. 



Receive Data Clamp 

Receive Data line forced to mark during periods when 
CAR status bit is false. 



4.0 PHYSICAL DESCRIPTION 



The 2200-401 is mounted in an injection-molded 
high-strength two-part housing. Color and style are 
coordinated with the Datapoint 2200. The rear of the 
housing is designed to attach directly to the rear of a 
Datapoint console. It can also be wall or surface mounted in 
any position. Figure 3 provides complete dimensions. 



5.0 ENVIR0NI4ENTAL REQUIREMENTS 

The 2200-401 is designed to operate without special 

2200-401 - 9/20/72 Page 11 of 21 



TOP VIEW 



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REAK VIEW 







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SA8C PLATE 



SIDE. VIEW 



FIGURE 3 : 2200-401 HOUSING 



considerations for heating or cooling. The operating range 
is degrees to 50 degrees (32 degrees to 122 degrees 
Fahrenheit) , 10% to 95% humidity without condensation. 

6.0 INTERFACE REQUIREMENTS 

6.1 Datapoint 2200 Processor Interface 

The 2200-401 interfaces to the 2200 processor 
input/output bus via the Jl connector. Connection is made 
from Jl to the processor input/output connector or the J2 
connector of another input/output device by means of a 
2200-160 or 2200-162 cable. J2 on the 2200-401 is connected 
in parallel with Jl for connection of additional 
input/output devices in "daisy-chain" fashion. Operating 
power is supplied to the 2200-402 from the 2200 processor 
via the Jl connector. 

6.2 DAA Interface 

Connection to the DAA is made to the J 3 connector on 
the 2200-401 via a 2200-430, 2200-431, or 2200-432 cable 
(see Section 7.3). The J3 interface is provided through an 
Amphenol 17-10500-1 connector. Pin assignment and signal 
names for DAA connectors are as follows: 



2200-401 - 9/20/72 Page 19 of 21 



LEAD FUNCTION 



BELL/DAA COLOR 

NAME 



INPUT/OUTPUT 



Ground 



-V, C White 



Off-Hook 



OH 



Gray 



Output 



+25 volts 



+V 



Violet Output 



DA (line con- DA 
nection Re- 
quested) 



Blue 



Output 



Ring Indica- RI 
tor 



Green 



Input 



Data Coupler CCT or Yellow Input 
Ready DM 



10,11 Telephone 
Line Pair 



DT, DR Orange, Both 
Red 



7,0 OPTIONS 



7.1 Address Selection 



The 2200-401 is wired at the factory for input/output 
address 322 (octal) . This address may be modified by 
changing four jumper wires in the communications interface 
portion of the units. 



7.2 Multi-Unit Installation 



For systems requiring more than two Communications 
Adaptor type devices (such as the 2200-401) which draw power 
from the 2200 processor, a card tray which can accommodate 
up to ten of these units is available under model number 
2200-450. In this case, the 2200-452 Communications Adaptor 
(cards only) is used in place of the 2200-401, 



2200-401 - 9/20/72 



Page 20 of 21 



7.3 External RS-232 Device 

An external RS-232 interface receive-only device such 
as the Datapoint 3300-200 Thermal Printer may be connected 
to the 2200-401 through J 3 and operated as described 
previously. For connection of the 2200-401 to the DAA and a 
3300-200, a 2200-431 cable is available. For connection of 
the 2200-401 to the DAA and a standard RS-232 interface 
device a 2200-432 cable is available 

Caution: Damage to the 401 and/or the external device may 
result if external devices other than the 3300-200 Thermal 
Printer or cables other than the two specified above are 
used. The factory should be consulted to verify that the 
interface is correct. 



8.0 PARTS LIST 

The following separate parts are part of the 2200-401 
Communications Adaptor and are included in each shipment. 



Quantity Item 



1 2200-401 Communications Adaptor 

1 POOOIO ASR103 Tape 

1 POOOIO ASR103 Listing 

1 2200-160 (8 feet) Universal I/O Cable 

1 2200-430 DAA Cable 



2200-401 - 9/20/72 Page 21 of 21