Ametek Amrel PLA Series - Pla 3 U Model

M470039-01 REV-F Page 38
PLA 3U MODEL
FIGURE 1.10 – PLA 3U FRONT PANEL
NOTE: All front panel descriptions are the same for 2U, 3U, 4U, and 6U. see Figure 1.8.
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1. ( – ) Negative input terminal. (one M10 ,two M6 screw threads)
2. ( + ) Positive input terminal. (one M10 ,two M6 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
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8
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10
FIGURE 1.11 – PLA 3U REAR PANEL