Rfta Remote Interface Connector (J4); Table 3-4. Rfta Remote Interface Connector J4 Pinout Description - Comtech EF Data KST-2000B Installation And Operation Manual

Ku-Band Satellite Transceiver
Operation
3.4.4

RFTA Remote Interface Connector (J4)

The RFTA remote interface connector (J4) is a 26-pin, MS style female connector. It
routes serial interface signals, KP-10 power, and uplink and downlink fault information
from Unit A J2 remote to RJU-2000 J6, interface M&C connector. Refer to
Table 3-4 for connector pinout.

Table 3-4. RFTA Remote Interface Connector J4 Pinout Description

Pin
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
U
V
W
X
Y
Z
a
b
c
Signal
–TX/RX –RX –EIA-485 TX/RX or –EIA-422 RX
–TX/RX –TX –EIA-485 TX/RX or –EIA-422 TX
+TX/RX +RX +EIA-485 TX/RX or +EIA-422 RX
+TX/RX +TX +EIA-485 TX/RX or +EIA-422 TX
N/C No connection
N/C No connection
N/C No connection
N/C No connection
GND Ground
N/C No connection
GND Ground
RESET Reset, (momentary low resets system)
GND Ground
N/C No connection
GND Ground
+12V +12VDC (KP-10 power supply output)
2/4 wire EIA-485 (open)/EIA-422 (ground) opera-
tion
UL_FLT_NC Uplink fault relay, closed = fault
UL_FLT_CO Uplink fault relay, common
M
UL_FLT_NO Uplink fault relay open = fault
DL_FLT_NC Downlink fault relay, closed = fault
DL_FLT_CO Downlink fault relay common
M
DL_FLT_NO Downlink fault relay, open = fault
N/C No connection
N/C No connection
N/C No connection
Description
3–12
Revision 9
MN/KST2000AB.IOM