Comtech EF Data KST-2000L - Manual (Page 35)

Satellite Terminal System Revision 2
Connector Pinouts MN/KST2000L.IOM
3.2.1.2 Remote Connector (J2)
The Remote Connector (J2) is a 26-pin, circular, female connector. It is used to allow
remote control and monitoring of KST-2000L operating parameters. Interface is via EIA-
232, EIA-485, or EIA-422 half-duplex. Refer to Table 3-5 for pin assignments.
Note: This cable must be assembled by the user. Figure 3-2 shows the connections for an
EIA-232 adapter for use with a PC COM port.
Table 3-5. Remote M&C Connector (J2) Pin Assignments
Pin Signal Description
A -TX/-RX or –TX only (see Note) – EIA-485 TX/RX or – EIA-422 TX
B -TX/-RX or –RX only (see Note) –EIA-485 TX/RX or – EIA-422 RX
C +TX/+RX or +TX only (see Note) + EIA-485 TX/RX or + EIA-422 TX
D +TX/+RX or +RX only (see Note) + EIA-485 TX/RX or + EIA-422 RX
E RXD EIA-232 receive data
F RTS EIA-232 ready to send (tied to CTS)
G TXD EIA-232 transmit data
H DSR EIA-232 data set ready
J GND Ground
K LNB Power +15 VDC to LNB
L LNB Power Return +15 VDC Return from LNB
M RESET Reset (momentary low resets system)
N GND Ground
P CTS EIA-232 clear to send (tied to RTS)
R GND Ground
S +12V (KP10 Power) KP10 power supply output
T 2/4 wire (see note) EIA-485/EIA-422 operation selection
U UL_FLT_NC Uplink fault relay, closed = fault
V UL_FLT_COM Uplink fault relay common
W UL_FLT_NO Uplink fault relay, open = fault
X DL_FLT_NC Downlink fault relay, closed = fault
Y DL_FLT_COM Downlink fault relay common
Z DL_FLT_NO Downlink fault relay, open = fault
a SUM_FLT_NO Summary fault relay, open = fault
b SUM_FLT_NC Summary fault relay, closed = fault
c SUM_FLT_COM Summary fault relay, common
Note: These signals can be configured as EIA-485, 2-wire, half-duplex or EIA-422,
4-wire, half-duplex. In 2-wire mode, pins A and B are tied together as are pins C and D.
To select 2 wire operation, pin T is left open. Tie pin T to ground for EIA-422 (4-wire)
operation.
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