Specifications

Installation PSM-500/500L/500LT SCPC Satellite Modem
Page 2-4 PSM-500/500L/500L T- Rev. 0.91
The ESC channel connection at 37-pin male “D” sub connector J4 (AUX). (When the optional
IBS multiplexer is enabled). See Appendix C, “Cabling Specifications” for the pins used
for each of the following interfaces available on the “AUX” connector.
RS-232 Standard Mode Connection (synchronous)
RS-232 Transmit on pin 4 (input to modem, sampled on rising clock edge)
RS-232 Transmit Clock on pin 13 (output from modem)
RS-232 Receive on pin 6 (output from modem, changes on falling clock edge)
RS-232 Receive Clock on pin 7 (output from modem)
RS-232 Enhanced/Custom Mode Connection:
RS-232 Transmit on pin 4 (input to modem)
RS-232 Receive on pin 6 (output from modem)
RS-232 CTS on pin 7 (output from modem)
RS-232 RTS on pin 9 (input to modem)
RS-232 DSR on pin 11 (output from modem)
RS-232 DTR on pin 12 (input to modem)
RS-232 DCD on pin 13 (output from modem)
RS-485 Connection:
RS-485 Receive A on pin 11 (output from modem)
RS-485 Receive B on pin 6. (output from modem)
RS-485 Transmit A on pin 12 (input to modem)
RS-485 Transmit B on pin 4. (input to modem)
User Remote Facility Control channel A
Pin 33 - RFC channel A Input (TTL, Internal 1mA Pull-Up)
Pin 34 - RFC channel A Form-C Common
Pin 35 - RFC channel A Form-C N.C.
Pin 16 - RFC channel A Form-C N.O.
User Remote Facility Control channel B
Pin 15 - RFC channel B Input (TTL, Internal 1mA Pull-Up)
Pin 17 - RFC channel B Form-C Common
Pin 18 - RFC channel B Form-C N.C.
Pin 36 - RFC channel B Form-C N.O.
Grounds
Pins 14, 19, 20, 32, 37