Interface Selection; Db-25M Connector Pin Outs - SeaLevel ACB-MP+4.PCI User Manual

Interface Selection

The ACB-MP+4.PCI supports a variety of electrical interfaces. Refer to the Control
and Status Register Definitions found in the Technical Description section of this
manual for this bit description. There is line termination on RXD, RXC, and TXC in
the following modes: RS-530, RS-530A, RS-485T, and V.35.
HEX
6,7,8,9

DB-25M Connector Pin Outs

RS-232 Signals
Base+5, M3-M0=2, 0010
Pin #
© Sealevel Systems, Inc.
M3 M2
0 0 0
1 0 0
2 0 0
3 0 0
4 0 1
5 0 1
0 1
A 1 0
B 1 0
C 1 1
D 1 1
E 1 1
F 1 1
Signal
2 TD Transmit Data
3 RD Receive Data
4 RTS Request To Send
5 CTS Clear To Send
6 DSR Data Set Ready
7 GND Ground
8 DCD Data Carrier Detect
15 TXC Transmit Clock
17 RXC Receive Clock
18 LL Local Loopback
20 DTR Data Terminal Ready
21 RL Remote Loopback
24 TSET Transmit Signal Element Timing
M1 M0
0 0 All signals are high impedance
0 1 * not supported *
1 0
RS-232
1 1 * not supported *
0 0
RS-485T with 120Ω termination
0 1 RS-485 without termination
1 0 * not supported *
1 0 single ended loopback
1 1 differential loopback
0 0 * not supported *
0 1 RS-530
1 0 V.35
1 1
RS-530A
Name Mode
Output
Input
Output
Input
Input
Input
Input
Input
Output
Output
Output
Output
- 7 - ACB-MP+4.PCI User Manual
Interface Mode