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NOTE: Loads must
not exceed 0.5 AMP
@ 250 VDC.
All grounds (-) must
be common.
Typical Wiring Diagrams
Dimensions
Mounting Hole
Dimensions
MDM45 - ___
To order specify trip point output and unit of measure-
ment. Example MDM45-B.
Warranty
A two year limited warranty on materials and workmanship
is given with this Murphy product. Details are available on
request and are packed with each unit.
Low contact High contact
(decreasing value) (increasing value)
A
* closes closes
B
opens closes
C
closes opens
D
opens opens
*Standard configuration
Note: The MDM45 is for use with Electromechanical TATTLETALE
®
annunciators or
SELECTRONIC
®
or similar solid state annunciators.
Separate Transmitter Power Source
Open Transmitter Input
An open transmitter input causes the SWICHGAGE
®
to
go negative, triggering the low trip point if the trip point
is being used.
4-3/4 in.
(121 mm)
120
2-39/64 in.
(66 mm)
radius
1/4 in.
(6 mm)
diameter
3 holes
120
4-3/4 in.
(121 mm)
4-1/4 in.
(108 mm)
4 in.
(102 mm)
5-1/2 in.
(140 mm)
Transmitter Input
terminal block
12/24
NEG
TP1
L
L
MDM45
Back view
12/24 VDC
=LOAD
L
TP2
4-20 mA
Signal
NC
12/24
NEG
TP1
L
L
MDM45
Back view
12/24 VDC
=LOAD
L
TP2
4-20 mA
Signal
NC
Transmitter Input
terminal block
How to Order
MDM45 Interface Capabilities
Model Power Source Rating
LCDT CD Ign., 120 VAC, 12/24 VDC Cl.I, Div.1, Gr.D, Haz. areas
*
S1400 120 VAC or 12/24 VDC Cl.I, Div.1, Gr.D, Haz. areas
*
MARK II CD Ignition, pos. or neg. grnd Cl.I, Div.2, Gr.D, Haz. areas
**
TATTLETALE
®
CD Ign., 120 VAC, 12/24 VDC Non-Hazardous areas
PLC’s, various non-Murphy annunciators–contact factory.
*
An isolation barrier is needed between the MDM45 and an Annunciator rated for
Class I, Division 1, Group D, Hazardous Areas.
**
When used with approved ignition. Contact Murphy for details.
NOTE: Loads must
not exceed 0.5 AMP
@ 250 VDC.
All grounds (-) must
be common.
Common Transmitter Power Source
Printed in U.S.A.
0791156
®
FRANK W.
MFR.
■ Frank W. Murphy Manufacturer
P.O. Box 470248; Tulsa, Oklahoma 74147; USA
tel. (918) 627-3550 fax (918) 664-6146
e-mail sales@fwmurphy.com
■ Frank W. Murphy Southern Division
P.O. Box 1819; Rosenberg, Texas 77471; USA
tel. (281) 342-0297 fax (281) 341-6006
e-mail murphysd@intertex.net
Since 1939
■ Frank W. Murphy, Ltd.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
tel. +44 1722 410055 fax +44 1722 410088 tlx 477088
e-mail sales@fwmurphy.co.uk
■ Frank W. Murphy Pte., Ltd.
No. 2 Tuas South Street 2, Sprintecs Bldg., #02-01/02
Singapore 638042
tel. +65 863-1398 fax +65 863-0208
e-mail fwmsales@fwmurphy.com.sg
■ Murphek Pty., Ltd.
1620 Hume Highway; Campbellfield, Vic 3061; Australia
tel. +61 3 9358-5555 fax +61 3 9358-5558
e-mail murphy@macquarrie.com.au
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.
■ Murphy de México, S.A. de C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
tel. +52-48-206264 fax +52-48-206336
e-mail murmexsl@sanluis.podernet.com.mx
■ Murphy Switch of California
P.O. Box 900788; Palmdale, California 93590; USA
tel. (805) 272-4700 fax (805) 947-7570
e-mail sales@murphyswitch.com
■ Frank W. Murphy France
tel. +33 1 30 762626 fax +33 1 30 763989