CPI Satcom Division VZC-6967 Series, Installation, Operation And Maintenance Manual

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CHPA SERIES
3-6
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Table 3-3. RF Switch Pin Assignment (J5)
Pin # Signal Name Remarks
1 Low RF NC Relay NC 1 (Normally closed when coil is de-energized; closed to pin 2
during Low RF Alarm or the Fault state.)
2 Low RF Common Relay Common 1
3 Low RF NO Relay NO 1 (Normally open when coil is de-energized; open from pin 2
during Low RF Alarm or the Fault state.)
4 Fault NC Relay NC 2 (Normally closed when coil is de-energized; closed to pin 5
during the Fault state or whatever condition chosen for this relay.)
5 Fault Common Relay Common 2
6 Fault NO Relay NO 2 (Normally open when coil is de-energized; open from pin 5
during the Fault state or whatever condition chosen for this relay.)
7 Not used
8 Not used
9 Sum Fault NC Relay NC 3 (Normally closed when coil is de-energized; closed to pin
10 when the CHPA is latched into the Fault state.)
10 Sum Fault Common Relay Common 3
11 Sum Fault NO Relay NO 3 (Normally open when coil is de-energized; open from pin
10 when the CHPA is latched into the Fault state.)
12 Not used
13 Not used
14 RF Inhibit Closed to pin 15 for “No RF Inhibit.”
15 RF Inhibit Return Input Return
Table 3-3 Notes:
1. Outputs are dry relay contacts rated up to 50 VDC, 50 mA and are connected in fail-safe mode.
2. The RF Inhibit requires a maintained closed-contact with RF Inhibit return and an open circuit for RF Inhibit. For this reason, a
jumper connector is installed and shipped with the unit. When the CHPA is used in a switching system, this jumper is not
required. This RF Inhibit command is executed regardless of the current control mode.
3.5 External Interlocks Interface
The External Interlocks Interface allows the user to connect the CHPA to external safety
interlocks; this interface features two signals: External Interlock Non-Latching and External
Interlock Latching. External Interlock Non-Latching is RF Inhibit; this command is always
executed. External Interlock Latching is a user-induced fault and, unlike other faults, is not
recycled. These commands are executed by opening the command pin from its return.