Comtech EF Data CSAT-5060 Especificaciones descargar pdf (Pagina 49)

C-Band Transceiver Revision 1

Redundant Systems MN/CSAT5060.IOM

5–7

5.2.1 RS-485 Interface

The RSU-5060 provides a single point interface for the customer’s M&C system by pig

tailing the 4-wire RS-485 input to J5 and passing it out on both the J1 and J3 interface

connectors. When using the RS-485, 4-wire interface to talk to the individual CSAT’s

are addressed at subsequent addresses through the use of the ‘B SELECT *’ signal going

to CSAT B on the J3 interface connector. To set or change the address of both units, use

the SPA=XXXX command defined in sections 3 and 4 in conjunction with the global

address 0000.

Example: To set the two CSAT’s to addresses 0064 and 0065 send the

following command: <0000/SPA=0064’cr’

5.2.2 RED AUTO/MANUAL Signal

Pin P on the J5 connector is the ‘RED AUTO/MANUAL’ input pin. The user can use this

signal to control the operating mode of the RSU-5060. If this pin is left open, the RSU-

5060 is operated in the AUTO mode. In AUTO mode, the RSU-5060 monitors the state

of CSAT A and CSAT B via the ‘A/B FAULT N.O.’ signals on the J1/J3 connectors. If

the ONLINE unit fails, the RSU-5060 will automatically command both the Tx and Rx

transfer switches to change position.

Note: If the OFFLINE unit also is FAULTED, no switchover will occur.

The ‘RED AUTO/MANUAL’ signal has a corresponding REMOTE COMMAND,

“RAM=X”. This command, defined in section 4, can be used to control the operating

mode of the RSU-5060 assuming that Pin P is left open. (Note: Grounding Pin P forces

the RSU-5060 into MANUAL mode independent of the “RAM=X” remote command.)

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Comtech EF Data CSAT-5060 Especificaciones Pagina 49