Murphy 45HE User Manual

15

20

140

160

120

10

80

60

100

Fingertip
Adjustable
Trip Point

PowerHall*
Transistor

Magnetized
Indicating
Pointer

45HE-95116B

®

FRANK W.

MFR.

Catalog Section 05/10/15

Revised 12-96

(00-02-0221)

4-1/2 in. (114 mm) Dial Size Hall Effect SWICHGAGE

45HE Series

■

Proven Hall Effect Switch Technology for
Pressure, Temperature and Level Applications

■

Easy-to-Adjust Alarm or Shutdown Set Points

■

Normally Open or Normally Closed Systems

■

Superior Switching Accuracy and Flexibility

■

Ideal for DC Powered Solid State Controllers

■

Tough Die Casted Aluminum Housing

■

Explosion-Proof Case Available

Description

The 45HE Series SWICHGAGE®is a monitoring
and alarm/shutdown device for industrial require­ments. It combines state-of-the-art Hall effect
switching and analog indication for Pressure,
Temperature or Level applications depending on
the model used.

The 45HE is ideal for use with DC powered solid
state controllers because it operates with
Normally Open or Normally Closed Systems
from 4.5 to 28 VDC. 120 VAC On-Off control
available in Latching Control Relay (BP) models.

Most 45HE models are available in
or panel mount case designs.
single scale, and custom dials are also available.

surface mount

Dials are dual scale,

Basic Operation

Based on our proven OPL, SPL and OPLH Series
SWICHGAGE®models, the 45HE Series includes
two magnetic-field-actuated PowerHall* transis­tors. When the magnetized indicating pointer
meets one of the
Hall effect devices,
the corresponding
alarm or shutdown
transistor output
signal becomes
active. The 45HE
trip points are fin­gertip adjustable.

* Allegro MicroSystems, Inc., registered trademark.

Applications

The 45HE Series SWICHGAGE®models accurate­ly and reliably measure, indicate and control pres­sure, temperature and level in applications such as
gas compressor control panels, pumping applica­tions, industrial process applications.
45HE models are available for specific applications
such as monitoring oil well lead lines, storage tank
levels, automatic ON/OFF pump control, etc.

Optional Features

Remote Transmitter Option (-P4)

This factory-sealed, remote pressure transmitter
protects the 45PHE sensing element from line pres­sures of highly viscous and mildly corrosive fluids.
A 5 foot (1.5 m) stainless steel capillary tube trans­mits pressure from the diaphragm seal to the unit.
A 1 NPTM plated steel pulsation dampener is
included to help prevent damaging pulsation.

Features

PLC and Solid State Compatible

The Normally Open and Normally Closed ver­sions of the 45HE Series are suitable for Murphy
(and others) solid state TATTLETALE®annunci­ators and logic controllers, PLC’s and micro­processor-based controllers.

Low Switch Start-Up Override

A standard toggle switch is provided (N.O. and N.C.
surface mounted models) to override the low switch
during equipment start-up.

Latching Control Relay (BP Model)

The 45HEBP Series includes a latching control
relay for automatic ON/OFF control, either direct­ly or through a motor starter.

Freeze-proof Sensing (FP Model)

A freeze-proof sensing device is available for the
45LHE Series level SWICHGAGE®. The freeze­proof device inserts directly into the tank wall.
The 45LHEFP sensor is stainless steel with a
Buna-N rolling diaphragm.

Direct Transmitter Option (-P6)

The -P6 option is the direct mounted version of the

-P4 (remote transmitter option). This factory­sealed mechanism consists of a 2 NPTM plated
steel diaphragm housing (304 stainless steel
diaphragm housing is optional), which attaches
directly to the 45PHE pressure SWICHGAGE®.

Explosion-proof Option (-EX)

Most 45HE Series SWICHGAGE®devices are
available with an explosion-proof case for haz­ardous applications.

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.

®

Specifications

3

1

Note 1

White

Red

Green

Black

24

+

–

+

–

Low

High

= 26 AWG (0.12 mm2)

Red= Positive Power Input
Green= Negative Power Input
White= Low Transistor Sinking Output
Black= High Transistor Sinking Output

Customer
Connections
12 or 24 VDC

7

9

6

A

5

B

8

3

4

1

Red

White

Red

Red

= 16 AWG (1.5 mm2)

= 26 AWG (0.12 mm

2

)

Brown

Relay Coils

Yellow

Blue

Green

Green

Black

Black

1

2

4

5

3

Green

Red

+

--

++

––

Set

Reset

Low

High

Contacts Shown Reset

(Low Limit has been Met)

Customer
Connections
120 VAC

7

9

6

8

3

4

1

Red

White

White

Black

Full Wave
Rectifier

Low

High

Contacts Shown Reset

(Low Limit has been Met)

= 18 AWG (1.0 mm

2

)

Brown

Yellow

Blue

Green

Black

Black

1
2

4

5

3

Green

Red

Red

= 16 AWG (1.5 mm2)

= 26 AWG (0.12 mm

2

)

+

–

+

–

N

H

7

9

A

5

B

4

1

Relay Coils

Set

Reset

312 4

Note 2

White

Red

Green

Black

+

–

+

–

Low

High

= 26 AWG (0.12 mm2)

Red= Positive Power Input
Green= Negative Power Input
White= Low Transistor Sinking Output
Black= High Transistor Sinking Output

Case: Die casted aluminum,
Dial: 4-1/2 in. (114 mm), white on black background.
Sensing Element: Bronze bourdon tube standard; 316 stainless steel or monel

are optional. 45LHEA and 45LHE Level models up to 20 ft. (6.09 m) brass
bellows is standard; stainless steel bellows is optional (see page 4).

Geared Movement: 302 and 304 stainless steel.
Lens: Clear Polycarbonate, UV stabilized, fog and scratch resistant.
SWICHGAGE®Sensor: PowerHall; outputs negative signal

(sinking transistor output) rated: 300 mA continuous.

SWICHGAGE®Set Points: 2-fingertip adjustable, visible on face-dial.
SWICHGAGE®Electrical Connection:

Surface Mount Case: Terminal block; 1/2 NPTF conduit connection.
Panel Mount Case: Wire leads, 18 AWG x 8 in. (1.0 mm

1/2 NPTM conduit connection.

Optional Conduit Connection: 24 AWG x 8 in. (0.22 mm

2

x 203 mm);

2

x 203 mm);

1/2 NPTM conduit connection.

Operating Temperature: -40 to 185°F (-40 to +85°C).
Storage Temperature: -77 to 185°F (-60 to 85°C).
Power Input: 4.5 to 28 VDC; 120 VAC/24VDC for Latching Control

Relay (BP) models with built-in transformer/rectifier.

Overrange: Do not exceed 30% above full range (all models).
Pressure Models Sensing Connection: Bottom connection 1/4 NPTM thru

1000 psi (6.89 MPa) [68.9 bar], or 1/2 NPTM 1500 psi (10.3 MPa) [103 bar]
thru 20,000 psi (137 MPa) [1378 bar], back connection optional.

Pressure Models Accuracy: ±2% for the first and last quarters of the scale,

the middle half of scale is ±1%.

Temperature Models Sensing Connections:

Capillary: 5 feet (1.5 m) PVC armored copper tube, standard.
Sensing Bulb: Copper, 1/2 in. (13 mm) O.D. x 7 in. (178 mm) length;

Sensing Bulb Connection: 1/2 NPTM.

Temperature Models Accuracy

Temperature Range Lower

Level Models Sensing Connections:

45LHE, 45LHEF: Bottom connection 1/4 NPTM.
Bellows Mov. Models (up to 20 ft. [6 m] range): Bottom connection 1/4 NPTF.
45LHEFP: 2 NPTM back connection.

Level Models Accuracy: ±2% for the first and last quarters of the scale,

the middle half of scale is ±1%.

(Other options available see “How to Order” section, page 4).
600 psi (4.14 MPa) [41.37 bar] pressure rating, for higher pressure

ratings the use of thermowell is recommended.

1

/4 Middle 1/2 Upper 1/4

-60 to 60°F ± 2°F ± 2°F ± 2°F
(-51 to 16°C) (± 1°C) (± 1°C) (± 1°C)

-40 to 136°F ± 4°F ± 2°F ± 2°F
(-40 to 58°C) (± 2°C) (± 1°C) (± 1°C)

15 to 250°F ± 8°F ± 2°F ± 2°F

(9 to 121°C) (± 4°C) (± 1°C) (±1°C)

130 to 350°F ± 8°F ± 2°F ±3°F
(60 to 180°C) (± 4°C) (± 1°C) (± 1.5°C)

260 to 450°F ± 8°F ± 2°F ± 3°F
(127 to 232°C) (± 4°C) (± 1°C) (± 1.5°C)

Internal Wiring

Important information: When using the 45HE SWICHGAGE®with inductive loads, we recommend installing a suppression diode across all coil(s).

45PHE, 45THE and

45LHE Series

Hall Effect Sensors Ratings: 300 mA continuous

Note 1: Start/Run Switch; Open for Start,

Closed for Run (surface mount models only).

Note 2: Start/Run Switch; Closed for Start,

Open for Run (surface mount models only).

45PHENC, 45THENC

and 45LHENC Series

45PHEBP, 45THEBP and

45LHEBP Series (12/24 VDC)

45PHEBP, 45THEBP and

45LHEBP Series (120 VAC)

Latching Relay Contact Ratings: SPDT Dry Relay Contacts, 10 A @ 120 VAC