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20 Pin
NAME
1
CHANNEL 0 APOS
2
CHANNEL 0 ANEG
3
Chassis GND
4
CHANNEL 0 BPOS
5
CHANNEL 0 BNEG
6
Chassis GND
7
CHANNEL1 APOS
8
CHANNEL 1 ANEG
9
Chassis GND
10
CHANNEL 1 BPOS
11
CHANNEL 1 BNEG
12
Chassis GND
CH0INHBIT0
13
14
CH0 BCENAB
15
CH0 BCTRIG
16
SPARE INPUT
CH1INHBIT1
17
18
CH1 BCENAB
19
CH1 BCTRIG
Table 4 – Connector J-4 pin-out
DESCRIPTION
MIL-STD-1553 CH0 A+ (BUSA)
MIL-STD-1553 CH0 A- (nBUSA)
Mounting screw – no other connection.
MIL-STD-1553 CH0 B+ (BUSB)
MIL-STD-1553 CH0 B- (nBUSB)
Mounting screw – no other connection.
MIL-STD-1553 CH1 A+
MIL-STD-1553 CH1 A-
Mounting screw – no other connection.
MIL-STD-1553 CH1 B+
MIL-STD-1553 CH1 B-
Mounting screw – no other connection.
Channel 0 Transmit Inhibit. 10K pull-up. Connects
to an inverter which Inverted direct connect to
2130 inhibit pins.
Channel 0 BC Enable. 10K pull-up.
Channel 0 BC Trigger. 10K pull-up.
Unused.
Channel 0 Transmit Inhibit. 10K pull-up.
Inverted direct connect to 2130 inhibit pins.
Channel 1 BC Enable. 10K pull-up.
Channel 1 BC Trigger. 10K pull-up.
Holt Integrated Circuits
27
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