Ametek Amrel PLA Series Operation Manual page 44

b. RY_CO Relay Common. Provides the common (reference) connection only for RY_NC or RY_NO
c. RY_NO Dry Contacts alarm: a fault alarm is declared if there is a loss of AC power or protections are triggered.
The fault alarm outputs provide a normally open relay configuration that provides user's flexibility and isolation
required to an external controller or an external alarm panel. The delay is 3 second.
d. RI_1 Remote Inhibited (RI) is used as an emergency switch to disable the system. RI can be connecting to a
switch or an open collector device that shorts the RI pin to common (EGND) whenever it is necessary to disable
input of the unit. Once RI is activated, it will turn off the dc output. In order to re-activate the unit, the
connection between common and RI pin needs to be open again, and it will have 3 seconds delay.
4. External programming port.
5. Connector, GPIB/IEEE-488.2.
6. Connector, DB9 for RS232.
7. Connector, RJ45 for Ethernet interface (LAN).
8. Connector, USB.
9. AC power inlet with external fuse holder.
10. Interconnect AC power (future option)
11. Interconnect cables (future option)
M470039-01 REV-F Page 43