Installation Instructions for MurphyLink
TM
Analog Gages Series: MLA20 and MLA35
MLA-00012N
Revised 10-04
Section 78
00-02-0424
Please read the following information before installing
.
A visual inspection of this product for damage during shipping is recommended before mounting. It is your responsibility to have a qualified person install this unit.
GENERAL INFORMATION
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔
Disconnect all electrical power to the machine.
✔
Make sure the machine cannot operate during installation.
✔
Follow all safety warnings of the machine manufacturer.
✔
Read and follow all installation instructions.
Description
The MurphyLink TM gages are a series of instruments designed to display the information transmitted by the Murphy Display and Diagnostic Module
(MDDM) in a traditional analog format. Communication from the MDDM to these units is via an RS485 twisted pair proprietary serial link. These
MurphyLink TM components are environmentally sealed, LED back lit (green) and are available in a standard 2 in. (51 mm) diameter, plastic case. The
MLA35 Series models feature a 3-3/8 in. (86 mm) diameter, plastic case.
Specifications
Power Supply:
Input Voltage: 12V (10-16 VDC min. & max. voltage).
24V (18-32 VDC min. & max. voltage).
Operating Current: (@ 14 VDC) = MLA20: 27 mA min.; 50 mA max.
Backlight:
MLA35: 43 mA min.; 48 mA max.
Voltage: 12 to 14 VDC (See NOTE below).
Maximum Current: 30 mA.
NOTE: MLVC2412 Regulator required for 24 VDC Systems.
MLA20 Series MLA35 Series
Basic 2 in. (51 mm) case models
MLA20-A-100-A
MLA20-B-250-A
MLA20-C-12-A
MLA20-C-24-A
MLA20-D-100-A
MLA20-E-400-A
MLA20-F-250-A
Engine Oil Pressure
Coolant Temperature
Voltmeter 12 VDC
Voltmeter 24 VDC
Percent Load @ Current Speed
Gear Oil Pressure
Gear Oil Temperature
Basic 3-3/8 in. (86 mm) case models
MLA35-T-3000-A
MLA35-S-85-A
Tachometer
Speedometer
NOTE: All basic models listed above are available with Amp mini universal (standard), Deutsch or Metri-Pack connectors.
Input: RS485 data (MurphyLink TM proprietary protocol).
Output: Analog Readout.
Operating Temperature: -40° to 185°F (-40° to 85°C).
Storage Temperature: -76° to 185°F (-60° to 85°C).
Dial: White numerals over black background:
MLA20: 90° sweep; MLA35: 250° sweep.
Gage Accuracy: MLA20: Better than ±1.5% of scale.
MLA35: Better than ±2% of scale.
Enclosure: Environmentally Sealed.
Material:
Case and Clamp: Polyester (PBT).
Lens: Polycarbonate.
Bezel: Stainless Steel (Black optional).
CAUTION: These instruments are designed to be used ONLY with the MurphyLink TM Display and Diagnostic module (MDDM) or other approved MurphyLink TM products.
Warranty
A limited warranty on materials and workmanship is given with this
FWMurphy product. A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/warranty.asp.
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.
Installation MLA-00012N page 1 of 2
MLA20 and MLA35 Dimensions and Mounting
MLA20 Series MLA35 Series
0.48 in. (12 mm)
Push On Plug (Amp)
Connection
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
3.22 in.
(82 mm)
For Panels up to 3/8 in.
(9.5 mm) maximum thickness
2.25 in. (57 mm) 1.94 in. (49 mm)
3.55 in. (90 mm) 2.0 in. (51 mm)
Mounting Hole
2.062 in. (52 mm) Dia.
For Panels up to 3/4 in. (19 mm) maximum thickness
Mounting Hole
3.375 in. (86 mm) Dia.
For Panels up to 3/4 in. (19 mm) 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
Place Resistor at
End of Line on
Last MLA gage.
(included for factory purchased panels.)
120 Ω
White
Orange
RS485 (+) Data
RS485 (-) Data
MLA Gage
Rear View
MDDM Gage
Rear View
Illumination
Control*
(optional)
Pin A Pin H
120 Ω
Wiring for 24 VDC Systems
Place Resistor at
End of Line on
Last MLA gage.
(included for factory purchased panels.)
White
Orange
RS485 (+) Data
RS485 (-) Data
MLA Gage
Rear View
MDDM Gage
Rear View
Illumination
Control*
(optional)
Pin A Pin H
To Next
MLA Gage
Back
Light
Blue
Ground
Black
Red
* 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.
Battery
Battery
Ignition
Switch
To Next
MLA Gage
Blue
Back
Light
Ground
Black
Red Battery
* 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.
Ignition Switch
Battery
Back Light
Voltage
Regulator
(MLVC2412)
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100 fax +1 918 317 4266 e-mail [email protected] 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 [email protected]
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-mail [email protected]
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088 e-mail [email protected]
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-mail [email protected]
www.murphyswitch.com
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555 fax +61 3 9358 5558 e-mail [email protected]
R
E
G ISTERE
D
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
