Remote Inhibit - Ametek Amrel PLA Series Operation Manual

REMOTE INHIBIT (RI) & DRY CONTACTS ALARM PIN DEFINITION
In the case of fault conditions, the eLoad provides an externally short-activated emergency shut-off port
(Remote Inhibit) that will disengage the eLoad operation. For added protection, normal and deviant conditions
can be identified by the Dry Contacts Alarm, which utilizes Normal Open (RY_NO) and Normal Close
(RY_NC) relays as alarm indicators for customization of external protection systems. In the case of a
protection or AC power loss, the RY_NO will short (closed) and RY_NC will be opened to indicate a
fault/deviant condition, either contact can be used to trigger an external alarm.
Pin Number
1 – RI+
2 – RI-
3 – RY_NC
4 – RY_CO
5 – RY_NO
M470039-01 REV-F
SLAVE PIN 5 GOES TO MASTER PIN 1
SLAVE PIN 4 GOES TO MASTER PIN 2
Pin Definition
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.
The EGND return path for RI+ pin. Shorting RI+ and RI - (Pin 1
& Pin 2) will trigger RI protection.
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
Relay Common. Provides the common (reference) connection
only for RY_NC or 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.
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