Comtech EF Data CSAT-5060 - Manual (Page 50)

C-Band Transceiver Revision 1
Redundant Systems MN/CSAT5060.IOM
5–8
5.2.3 SWITCH CMD Signal
Pin V on the J5 connector is the ‘SWITCH CMD’ input pin. The user can use this signal
to command the RSU-5060 to change the position of both the Tx and Rx transfer
switches. This pin should normally be left OPEN and momentarily shorted to ground to
force a switch over (minimum pulse width for this signal is 100 mS). The RSU-5060
operating mode does effect how it will respond to the ‘SWITCH CMD’ command.
• If the operating mode is AUTO, a momentary short to ground on Pin V will
cause the RSU-5060 to change the position of the Tx and Rx transfer switches
only if the currently OFFLINE unit is not faulted.
•
If the operating mode is MANUAL, a momentary short to ground on Pin V will
always cause the RSU-5060 to change the position of the Tx and Rx transfer
switches. Like the ‘RED AUTO/MANUAL’ signal above, the ‘SWITCH CMD’
also has a corresponding REMOTE COMMAND, “RTG=”. This command,
defined in Appendix A, has the same effect as a momentary short to ground on
Pin V.
5.2.4 REDUNDANCY A/B Signals
Pin S on both J1 and J3 connectors are used to tell the CSAT’s that they are in a
redundant configuration.
5.2.5 REDUND_FLT Signal
Pin F on both J1 and J3 connectors are output signals from the RSU-5060 to the CSAT’s
to provide status indication to the CSAT’s regarding the operating condition of both the
RSU-5060 and the two transfer switches. This signal is normally a one-half hertz square
wave. If this signal goes away, the ONLINE CSAT will use the AUXCOM (RS232)
interface to the RSU-5060 to get more information regarding the problem at hand. This
information is available to the user via the “RRS?” query described in section 4.
5.2.6 AUXCOM Signals
Pins H and J on both the J1 and J3 connectors are the EIA-232 RD and EIA-232 TD
signals respectively. The AUXCOM interface is used solely in conjunction with the
RSU-5060, and should not be confused with the ‘Customers EIA232’ interface available
on the CSAT J5 connector (pin E and F). The AUXCOM interface is used by the
ONLINE CSAT to ascertain information from the OFFLINE CSAT as well as the RSU-
5060.