Murphy MLA20 Series, MLA35 Series, Wiring for 12 VDC Systems Wiring for 24 VDC Systems

MLA20 and MLA35 Dimensions and Mounting

MLA20 Series
	0.48 in. (12 mm)	Push On Plug (Amp)
		Connection
		1.94 in.
	(49 mm)
		For Panels up to 3/8 in.
		(9.5 mm) maximum thickness
2.25 in. (57 mm)	1.94 in. (49 mm)

MLA35 Series

3.55 in. (90 mm)

0.48 in. (12 mm)	Push On Plug (Amp)
	Connection
	3.22 in.
(82 mm)
	For Panels up to 3/8 in.
	(9.5 mm) maximum thickness
2.0 in. (51 mm)

Mounting Hole	For Panels up to 3/4 in. (19 mm)
2.062 in. (52 mm) Dia.
	maximum thickness

Mounting Hole	For Panels up to 3/4 in. (19 mm)
3.375 in. (86 mm) Dia.
	maximum thickness

Mounting Clamp

Mounting Clamp

MLA20 and MLA35 Typical Wirings For 12 and 24 VDC

WARNING: Disconnect battery negative cable before wiring or service. Devices containing solid state components can be damaged or caused to malfunction when used in systems which incorporate inductive loads (e.g. relays, solenoids, etc.) that can generate voltage spikes. To reduce the potential for this type of damage, install a fly back or clamping diode across all inductive loads. Use Murphy diode package 65-00-0343 or equivalent. A typical diode is 1N4005 and is readily available from commercial sources. Failures of this type are not covered by our Limited Warranty.

Wiring for 12 VDC Systems

Wiring for 24 VDC Systems

Place Resistor at End of Line on Last MLA gage. (included for factory purchased panels.)

120Ω

To Next

MLA Gage

White	RS485 (+) Data
Orange RS485 (-) Data
	MDDM Gage
MLA Gage	Rear View Pin A Pin H
Rear View
Illumination
	Control*
	(optional)

Back
Light	Ignition
Blue

Place Resistor at End of Line on Last MLA gage. (included for factory purchased panels.)

120Ω

To Next

MLA Gage

White		RS485 (+) Data
Orange RS485 (-) Data
		MDDM Gage
MLA Gage		Rear View Pin A Pin H
Rear View		Illumination
		Control*
		(optional)
		Ignition Switch
	Back
Blue	Light

	Ground		Switch
Black	Battery	Battery
Red

	Ground
Black	Battery

Red	Battery		Back Light
		A B C

*Electronic Dimmer switch recommended with 4 A, capacity or heavy duty rheostat switch, 25 ohm, 5 watt.

For more than 6 MLA gages, contact factory for rheostat sizing.

* Electronic Dimmer switch recommended with 4 A, capacity	(VOut)	(Ground)	(Vin)	Voltage
or heavy duty rheostat switch, 25 ohm, 5 watt.				Regulator
For more than 6 MLA gages, contact factory for rheostat sizing.				(MLVC2412)

FW Murphy

P.O. Box 470248

Tulsa, Oklahoma 74147 USA +1 918 317 4100

fax +1 918 317 4266 e-mailsales@fwmurphy.com www.fwmurphy.com

CONTROL SYSTEMS & SERVICES DIVISION P.O. Box 1819; Rosenberg, Texas 77471; USA +1 281 633 4500 fax +1 281 633 4588 e-mail sales@fwmurphy.com

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje San Luis Potosí, S.L.P.; México 78384

+52 444 8206264 fax +52 444 8206336 Villahermosa Office +52 993 3162117 e-mailventas@murphymex.com.mx www.murphymex.com.mx

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K. +44 1722 410055 fax +44 1722 410088 e-mailsales@fwmurphy.co.uk www.fwmurphy.co.uk

MURPHY SWITCH OF CALIFORNIA

41343 12th Street West

Palmdale, California 93551-1442; USA

+1 661 272 4700 fax +1 661 947 7570 e-mailsales@murphyswitch.com www.murphyswitch.com

MACQUARRIE CORPORATION 1620 Hume Highway Campbellfield, Vic 3061; Australia

+61 3 9358 5555 fax +61 3 9358 5558 e-mailmurphy@macquarrie.com.au

E		D
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	E
GISTER

USA–ISO 9001:2000 FM 28221

UK–ISO 9001:2000 FM 29422

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

Printed in U.S.A.

Installation MLA-00012N page 2 of 2