User's Guide

Page 19
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MARC Data Connector
The MARC Data connector is an 8-way RJ48 socket. The connector pin-out is detailed in Table 7.
T1/E1 Connector
The T1/E1 connector is an 8-way RJ48 socket used for connecting to a Mode 3 network computer. The
connector pin-out is detailed in Table 8.
Table 7 MARC RJ48 Data Connector
Pin Number Signal Characteristic
1
2
Data in -
Data in +
RS422 differential asynchronous data, 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
3 Not connected -
4
5
Data out +
Data out -
RS422 differential asynchronous data, 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
6 Remote Supply ON/OFF
(input)
0 V to switch off.
Note: Rear panel switch must be in ON position for
this function to operate.
7 Ground 0 V.
8 Unregulated supply
(output)
This output is between 21.6 and 32 Vdc (nominally
24 V) fused at 500 mA.
Table 8 T1/E1 Connector
Pin Signal Characteristic
1 RRing
(input)
T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm),
AMI/B8ZS Coding.
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm),
AMI/HDB3 Coding.
Protected with 28 V differential and common mode clamp and 1.25 A
fuse in each line.
2RTip
(input)
3 Not connected -
4TRing
(output}
T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm),
AMI/B8ZS Coding.
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm),
AMI/HDB3 Coding.
Protected with 28 V differential and common mode clamp and 1.25 A
fuse in each line.
5TTip
(output)
6 Not connected -
7 Not connected -
8 Not connected -