Comtech EF Data KST-2000L - Manual (Page 25)

Satellite Terminal System Revision 2
Summary of Specifications MN/KST2000L.IOM
Table 2-5. M&C Functions/Parameters
Pin Signal Description
A -TX/-RX or –TX only (see Notes) -EIA-485 TX/RX or -EIA-422 TX
B -TX/-RX or –RX only (see Notes) -EIA-485 TX/RX or -EIA-422 TX
C +TX/+RX or +TX only (see Notes) +EIA-485 TX/RX or +EIA-422 TX
D +TX/+RX or +RX only (see Notes) +EIA-485 TX/RX or +EIA-422 TX
E RXD EIA-232 RX Data
F RTS EIA-232 Ready-to-Send (tied to CTS)
G TXD EIA-232 TX Data
H DSR EIA-232 Data Set Ready
J GND Ground
K LNA Power +15 VDC to LNA
L LNA Power Return +15 VDC Return from LNA
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-232 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
Notes:
1. These signals can be configured as EIA-485, 2-wire, half-duplex or EIA-422, 4-wire,
half-duplex.
2. In 2-wire mode, pins A and B are tied together as are pins C and D.
3. To select 2-wire operation, pin T is left open.
4. Tie pin T to ground for EIA-422 (4-wire) operation.
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