Murphy SHD30 User Manual
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 minimum 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
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
C US
A,
Vd
Vd
YP:
A
@
Vd
@
Vd
PU
Va
YP
A
A@
Va
X
AX
@
Va
A
@
Va
A
EL
AY
Vd
Vd
WARNING
5-13/16 in.
(148 mm )
5-13/16 in.
(148 mm )
Front View
Ø5-13/64 in.
Rear View
Ø6-1/2 in.
c 1kHz;
c
c, 10kHz
5Va
c
300Vd
120Va
@
300Vd
SCR = 0.5A,
c; 600uA @
@ 5Vac,10kHz;
c res
@ 5Vac,100Hz; 450uA@
90Vd
@
c, 125Vd
: 325uA
c,5kHz; 2mA
@ 5Vac,10kHz; 2.8W MAX
150uA
5Va
@
c TYP:
= 0.5A, 30Vd
INSTALLE CONFORMEMENT MURPHY 20-08-0258
MUST BE INSTALLED PER MURPHY DWG. 20-08-0258
1mA
15mw MAX
AY
c-120Vac TYP
5Va
MPU
OUTPUT REL
CD IGN 90-300Vd
1/4 in. (6 mm ) dia. holes
(3 places)
1-5/16 in.
(33 mm )
Side View
5-1/16 in.
(129 mm)
1/2 in.
(12 mm )
KEPS Nuts
(3 Supplied)
4-1/4 in.
(108 mm)
SHD3-97051N 2 of 4
TYPICAL WIRING
Connecting the Magnetic Pickup
Connect the magnetic pickup cable conductors to the 4-connector terminal strip as shown in Figure 2. Use a two conductor shielded cable
between the SHD30 models and the magnetic pickup.
Connecting to CD Ignition
Before wiring the SHD30 models, determine the output voltage and
ground polarity of the ignition. Table 1 (below, left) lists the Peak
Output Voltage and Ground Polarity of some common ignitions.
Connect the SHD30 models to a positive or a negative ground CD
ignition as shown in Figures 3 or 4.
Figure 2:
SHD30 models to magnetic pickup typical wiring
Figure 3:
SHD30
models
typical wiring for NEGATIVE ground ignition
Figure 4:
SHD30
models
typical wiring for POSITIVE ground ignition
Table 1:
Output Voltage & Polarity of Common CD Ignitions
WARNING
:
PERFORM THE WIRING INSTALLATION WITH THE POWER SOURCE OFF.
NEVER ROUTE THE SHD30 MODELS OVERSPEED OUTPUT LEADS WITH PRIMARY IGNITION WIRING.
OVERSPEED OUTPUT WIRING
Connecting the Overspeed Output
A 7-connector terminal strip, on the back of the SHD30 models, is provided for connection of the overspeed output. Terminals C., and N.C. are
used for connecting the output as a normally closed relay contact.
Terminals (+) and (–) are used for connecting the output as a normally
open SCR. Shown in Figure 5 is a typical wiring installation of the
SHD30 models
normally closed relay output
connected to a Murphy
MARK III digital annunciator. Figure 6 shows a typical wiring of the
SHD30 models
normally open SCR output
connected to a Murphy
MARK III digital fault annunciator.
Figure 7 displays a typical wiring of
the SHD30
models
normally open SCR output to a Murphy MARK IV
annunciator. Figure 8 displays a typical wiring of the SHD30 models normally closed relay output to a Murphy LCDT-NC annunciator. Figure 9
displays a typical wiring of the SHD30
models
normally open SCR output
to a Murphy LCDT-NO annunciator.
Figure 5:
SHD30
models
Normally Closed Relay output to MARK III
SHD30 To be
installed in accordance with NEC
code for Class I,
Div. 2 Grps. C &
D hazardous
locations.
SHD30 models To be installed in accordance with NEC code for Class I,
Div. 2 Grps. C & D hazardous locations.
Figure 6:
SHD30
models
Normally Open SCR output to MARK III
WARNING: Overspeed relay contact for use with FWMurphy nonincendive or intrinsically safe products only.
MFG & Series
Altronic I & V Negative 120 3
Altronic III Negative 225 3
Altronic II Positive 350 4
Bendix S-1800, BLAR Negative 250 3
Bendix Side-winder Positive 300 4
Fairbanks Morse SCSA Positive 180 4
Fairbanks Morse
3000 & 9000
American Bosch Magtronic
SHD30
5-120Vrms
Shield
ground
Magnetic Pickup
5 - 120Vrms
TB1
1 MPU +
5-120Vrms
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
N.O.
TB2
1234
TB1
+
C.
N.C.
1234
+
–
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
–
567
Ignition
Ground
Polarity
Peak Output
Voltage
Use Figure
Negative 225 3
Negative 165
3
TB1
1 MPU +
5-120Vrms
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
N.O.
TB2
1234
TB1
TB1
1 MPU +
5-120Vrms
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
N.O.
TB2
1234
TB1
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
7
+
C.
N.C.
567
1234
+
C.
N.C.
1234
SHD30
Reset Hourmeter
–
CD Ignition
90-350VDC
+
IGN
—
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
–
567
SHD30
CD Ignition
90-350VDC
—
IGN
+
TB1
1 MPU +
5-120Vrms
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
C
N O
TB2
1234
TB1
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
+
NC
–
567
1234
Back of MARK
III
17
IGN
+
CD Ignition
90-350VDC
—
Remove
Jumper
32
16
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
TB2
5-120Vrms
C
NO
NC
1234
1234
TB1
+
–
567
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
IGN
17
+
CD Ignition
90-350VDC
—
Back of MARK
III
16
Leave Jumper
in place
32
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