Aiphone LAF-40C, LAF-20CA Wiring Diagrams, 3a. Single Master SYSTEM, no ALL Call, Wiring Note

WIRING DIAGRAMS
3a. SINGLE MASTER SYSTEM, NO ALL CALL
	LAF-20C		LE-A
	1		1	LE-A	LE-D
				1
	2
					1
SA-	3
1	4			E	E
	5		E
SA-1 for optional	~		-	-	-
					LE-D
surge protection
(See note #3.)	20				1
	E				E
SA-	E
	E				-
1		All "E" terminals are
	E
	-		common internally.	NOTES:
	C			Two wiring method can be used:
				1. 2 conductor homerun to each sub station from the master.
	R
				(Single master system only.)
	Y		SA-
	P1		1	2. Run multi-conductor wire in a daisy-chained fashion with 2
	P2		PS-1225UL	common wires (E & -) plus one individual wire per station on the run.
	P3
			+	Remove jumpers between E & - when daisy-chained method is used.
	+
	-		-

3.To protect system from power surge, install SA-1 arrestors at master station. One SA-1 is required for every two wires connected to master.

3b. DUAL MASTER SYSTEM WITH MASTER-TO-MASTER COMMUNICATION

LAF-20CA

1

2

3

~

19

E

-

20

C

R

Y

P1

P2

P3

+

-

LAF-20CA		LE-DA		LE-DA
1			1			LE-DA
					1
2								LE-DA
3							1
									1
~
19
	Remove
E	E/- jumpers		E		E		E		E
-			-	-		-		-
C		Master-to-master
20
		communication is shown
R
		on channel 20 of each

Ymaster.

	P1		Y, P1, P2, P3			WIRING NOTE:
	P2		terminals used only if			The following sub stations
	P3		All Call Adaptors are			are wired as shown above:
			included.
						· LE-A, LE-AN
				PS-1225UL
	+		+
						· LE-B, LE-BN
	-		-			· LE-D, LE-DA
Blk		RY-AC for external signalling
		when sub calls
Red	RY-AC	Yellow			To external signalling device and power
Wht					(E.g. Station #19 will actvate ext. device
					when it calls in to master.)

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