Ametek Amrel PLA Series Operation Manual page 42

1. ( – ) Negative input terminal. (two M12 screw threads)
2. ( + ) Positive input terminal. (two M12 screw threads)
3. Relay connector.
a. RY_NC 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 closed relay configuration that provides user's
flexibility and isolation required to an external controller or an external alarm panel. The delay is 3 second
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. Chassis / Line ground lug screw.
10. AC power inlet with external fuse holder.
11. Water inlet ( Pipe size: 3/8" NPT)*
12. Water outlet ( Pipe size: 3/8" NPT)*
13. Water valve power connector
*To accommodate different cooling system requirements, every AMREL standalone 4U Water-
cooled eLoad is supplied with a set of detached external piping kit. MANIFOLD-4U converts two
3/8" NPT into one ½" NPT pipe size for both water inlet and outlet. Appendix B Section 6 provides
detail installation of MANIFOLD-4U to a 4U water cooled eLoad.
M470039-01 REV-F Page 41