Comtech EF Data XTD-750C-B1 Operation And Installation Manual page 49

Table 1, Digital Monitor and Control Connector J1 Pinouts
Pin Signal
A Reserved
B RS-232
C RS-232
D Reserved
E RS-232
F Reserved
G Reserved
H Reserved
J Reserved
K System GND
L RS-422/485
M RS-422/485
N RS-422/485
P RS-422/485
R RS-422/485
S Summary Fault A -- Normally
Open Contact
T Summary Fault A -- Normally
Closed Contact
U Summary Fault A
V Summary Fault B -- Normally
Open Contact
W Summary Fault B -- Normally
Closed Contact
X Summary Fault B
Y RF Inhibit Opto isolator Low
Z System GND
a System GND
b +24 VDC Out
c +24 VDC Out
d A/B Amplifier
e Re-program Computer
f +15 VDC Out
g RF Inhibit Opto isolator Hi
h External Interlock Opto isolator
Low
j RF Output Analog
MNC-0300-036
EAR EXPORT CONTROLLED: The information contained in this Manual refers or relates to a product that is subject
to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
whether in the U.S. or abroad, may require an export license from the U.S. Department of Commerce.
Description
Reserved
RX
TX
Reserved
GND
Reserved
Reserved
Reserved
Reserved
System GND
Transmit +
Transmit -
Receive +
Receive -
GND
S Closed to U when Fault
T Opened to U when Fault
Summary Fault A Common
V Closed to X when Fault
W Opened to X when Fault
X Summary Fault B Common
RF Inhibit -- Connect Pin Y to either Pin Z or Pin a,
and Pin g to Pin f to Inhibit RF
System GND
System GND
+24 VDC Current limit of 100 mA
+24 VDC Current limit of 100 mA
A/B Amplifier select
Re-program Computer command Low
+15 VDC Monitor and Opto-isolator Bias Supply
RF Inhibit -- Connect Pin g to Pin f, and Pin Y to either
Pin Z or Pin a to Inhibit RF
Connect Pin h to either Pin Z or Pin a for normal
operation.
(PdBm - 47.27)/19.05
V = 10
o
11 of 26
Unpacking and Installation
Revision E