Specifications

MR-2320 Series Installation and Operation Manual
19
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.
Figure 14: Releasing Circuit Wiring
Dialer Wiring
If you have an MR-2320-DR, there is a dialer on board and terminals marked Line 1 and Line 2 must be wired as
shown in Figure 15 below.
Figure 15: Dialer 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)
TIPTIP RINGRING
premise telephone
IF permitted
TIPTIP RINGRING
LINE-1
LINE-2
1
23
4
8
5
76
Public switch
Telephone company
wiring
TIP
RING
TIP
RING
RJ31X
GREY
BROWN
RED
GREEN
COCO RESRES
Line 2 is Wired as shown for Line 1
FIRE ALARM MAIN
BOARD