Murphy 45HE Series Specifications, Internal Wiring, 45PHE, 45THE 45LHE Series, Connections

Specifications

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 mm2 x 203 mm); 1/2 NPTM conduit connection.

Optional Conduit Connection: 24 AWG x 8 in. (0.22 mm2 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. (Other options available see “How to Order” section, page 4).

Sensing Bulb: Copper, 1/2 in. (13 mm) O.D. x 7 in. (178 mm) length; 600 psi (4.14 MPa) [41.37 bar] pressure rating, for higher pressure ratings the use of thermowell is recommended.

Sensing Bulb Connection: 1/2 NPTM.

Temperature Models Accuracy

Temperature Range	Lower 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)

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%.

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

45PHENC, 45THENC and 45LHENC Series

45PHEBP, 45THEBP and

45LHEBP Series (12/24 VDC)

45PHEBP, 45THEBP and 45LHEBP Series (120 VAC)

Low	High
+ –	+ –

Note 1

White	Red	Green	Black
3	1	2	4

= 26 AWG (0.12 mm2)

Red= Positive Power Input

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

	Low		High
	+	–	+	–
Note 2
White	Red	Green		Black
3	1	2		4

= 26 AWG (0.12 mm2)

Red= Positive Power Input

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

	Contacts Shown Reset
	(Low Limit has been Met)
4 Blue	7		1
			4
			3
	9		6
	B	Set
			A
		Relay Coils
Red

Customer	8	5
		Reset
Connections
12 or 24 VDC

+				Low
	Red	Red		+	–
1			White
2	Green
--

Yellow

3

Brown 5

Black

High

+ –

Green Black

4 Blue

Customer	Red
Connections
120 VAC
N	White
1
2	Black
H

Contacts Shown Reset

(Low Limit has been Met)

	1	Yellow	3
7	4

		3		Brown		5
9		6
B	Set			Black
		A
	Relay Coils
8	Reset	5
	Red	Low	–	High
		+		+	–
		White				Black
Full Wave			Green

Hall Effect Sensors Ratings: 300 mA continuous

Note 1: Start/Run Switch; Open for Start, Closed for Run (surface mount models only).

= 26 AWG (0.12 mm2)	Red
= 16 AWG (1.5 mm2)	Green

= 26 AWG (0.12 mm2) = 18 AWG (1.0 mm2)

= 16 AWG (1.5 mm2)

Rectifier Red

Green

Note 2: Start/Run Switch; Closed for Start, Open for Run (surface mount models only).

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