26
Field Wiring
6.4 Releasing Circuit Wiring
Wiring for the releasing circuit is shown in Figure 14 below. SIG3 and SIG4 output circuits are
reserved for the releasing circuits. Solenoid EOL module (MP-320R/W) is used to supervise
the solenoid coil. If the solenoid is already fitted with the directional diode then only the 3.9KΩ
EOL resistor is used. The supervisory current passes through the solenoid coil thus confirming
the integrity of the solenoid coil for open coil. The wiring is supervised for the open and short
conditions. See Appendix A: Compatible Solenoids on page 82 for compatible solenoids.
Figure 14 Releasing Circuit Wiring
FIRE ALARM MAIN BOARD
+
-
+
-
SIG 3SIG 4
Releasing
circuit #1
Releasing
circuit #2
Solenoid EOL
module
MP-320R/W
Solenoid EOL
module
MP-320R/W
Solenoid Coil (See
the listing for the
approved solenoids)
WARNING: EOL has to be close nipple
connected to the solenoid coil.
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