Murphy Digital Tach/Hourmeter with Overspeed Trip Point SHD30 User Manual
Warning, Description, Specifications
SHD3-97051N 1 of 4
Digital Tach/Hourmeter with Overspeed Trip Point
Installation Instructions for SHD30 and SHD30-45 Models
SHD3-97051N
Revised 05-03
Replaces SHD-96113N
Section 20
(00-02-0288)
Description
The SHD30 and SHD30-45 models are microprocessor-based digital
tachometers with hourmeter and overspeed trip point. The overspeed trip
point can be connected as either a form “C” relay output or as a normally
open SCR output.
In Class I, Div. 2, hazardous locations the SHD30 form “C” relay contact is
restricted for use with Murphy non-incendive or intrinsically-safe instruments. In
non-hazardous locations the relay contact may be used to switch resistive loads not
exceeding 0.5 A @ 30 VDC or 125 VAC.
When connected as a normally open SCR, the output is rated 0.5 A, 350 VDC
continuous and can switch up to 3 A @ 350 VDC momentary. The SCR output
may be used to switch designated normally open sensor inputs.
Specifications
Power input:
CD ignition: 90 to 350 VDC. 150 µA typical @ 90 VDC; 300 µA @ 350 VDC.
Magnetic Pickup: 5 to 120 Vrms.
325 µA typical @ 5 Vrms, 100 Hz; 450 µA typical @ 5 Vrms, 1 kHz;
1 mA typical @ 5 Vrms, 5 kHz; 2 mA typical @ 5 Vrms, 10 kHz;
15 mW max. @ 5 Vrms, 10 kHz; 2.8 W max. @ 120 Vrms, 10 kHz.
Backup Battery: 2 replaceable, long life Lithium batteries, Panasonic CR2032
or equivalent, 3 V, 220 mAh power.
Operating Temperature: -4° to 158°F (-20° to 70°C).
Storage Temperature: -40° to 300°F (-40° to 150°C).
Ignition Frequency Range: 3 to 666 Hz.
Magnetic Pickup Frequency Range: 1 to 10 kHz.
Overspeed Output:
Connected to S.C.R. (Silicon Controlled Rectifier) terminals:
0.5 A, 350 VDC continuous.
Connected to Form “C” Relay terminals:
Relay Contact, 0.5 A, 30 VDC, 125 VAC resistive.
Tachometer Accuracy: ±0.5% of the display reading or ±1 RPM
whichever is greater.
Hourmeter Range: 0 to 65535 hrs.
Hourmeter Accuracy: ±15 minutes per year.
Approvals: CSA approved for Cl. I, Div. 2, Grps. C & D hazardous areas.
Mounting
The SHD30 is designed for installation in panels from 0.032 to 0.125 in. (1 to
3 mm) thick. A round hole, 3-1/8 in. (79 mm) in diameter is needed for
mounting. Install the unit within a weatherproof enclosure to protect it from
the elements. Keep the unit away from ignition coils and coil leads; a mini-
mum of 12 in. (305 mm) is recommended.
Please read the following information before installing. A visual inspection for any damage which may have occurred during shipping is
recommended. It is your responsibility to have a qualified person install the unit, and make sure it conforms with NEC and local codes.
GENERAL INFORMATION
panel
gasket
Terminal
Blocks
4-1/4 in.
(108 mm)
5-1/16 in.
(129 mm)
1-9/32 in.
(33 mm)
2 in.
(51 mm)
2 in.
(51 mm)
1-1/2 in.
(38 mm)
2 in.
(51 mm)
3/16 in
(5 mm)
diameter,
4 places
3-1/8 in.
(79 mm)
diameter
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.
SHD30 Dimensions
SHD30-45 Dimensions/Mounting
Mounting Hole
Approved for Class I, Division 2,
Groups C & D Hazardous Areas
When installed per Murphy
Drawing 20-08-0258
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re
s
4-1/4 in.
(108 mm)
5-1/16 in.
(129 mm)
5-13/16 in.
(148 mm )
1-5/16 in.
(33 mm )
1/2 in.
(12 mm )
KEPS Nuts
(3 Supplied)
Ø
6-1/2 in.
5-13/16 in.
(148 mm )
Ø
5-13/64 in.
1/4 in. (6 mm ) dia. holes
(3 places)
Front View
Rear View
Side View