Interface Selection; Pin Connector Signal Layouts (Db-25 Male); Rs-232 Signals - SeaLevel ACB-MP.PCI User Manual

Interface Selection

The ACB-MP.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 M3
0 0
1 0
2 0
3 0
4 0
5 0
6,7,8,9 0
A 1
B 1
C 1
D 1
E 1
F 1

25 Pin Connector Signal Layouts (DB-25 Male)

RS-232 Signals

Base+5, M3-M0=2, 0010
Signal
GND Ground
RD Receive Data
CTS Clear To Send
DSR Data Set Ready
DCD Data Carrier Detect
TM Test Mode
TXC Transmit Clock
RXC Receive Clock
TSET Transmit Signal Element Timing
DTR Data Terminal Ready
TD Transmit Data
RTS Request To Send
LL Local Loop-back
RL Remote Loop-back
Technical Note: Please terminate any control signals that are not going to be used. The most common way to do
this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will
help insure you get the best performance from your adapter.
Sealevel Systems ACB-MP.PCI
M2 M1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
0 1
0 1
1 0
1 0
1 1
1 1
Name
Technical Description
M0 Interface Mode
0 All signals are high impedance
1 * not supported *
0
1 * not supported *
0 RS-485T with 120 ohm termination
1 RS-485 without termination
0 * not supported *
0 single ended loop-back
1 differential loop-back
0 * not supported *
1
0
1
Pin #
7
3
5
6
8
25
15
17
24
20
2
4
18
21
RS-232
RS-530
V.35
RS-530A
Mode
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
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