Murphy Digital Tach/Hourmeter with Overspeed Trip Point SHD30 - Manual (Page 3)

SHD3-97051N 3 of 4
WARNING: PERFORM THE WIRING INSTALLATION WITH THE POWER SOURCE OFF.
NEVER ROUTE THE SHD30 MODELS OVERSPEED OUTPUT LEADS WITH PRIMARY IGNITION WIRING.
44
50
44
45 45
46 46
47 47
48 48
49 49
50
LCDT
Terminal Block
SHD30
CD Ignition
90-350VDC
+
—
IGN
C NC + – N.O.
1 2 3 4
1 2 3 4
5 6 7
TB1
TB2
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc
5-120Vrms
46
Back of MARK IV
CD Ignition
90-350VDC
+
—
IGN
C NC
+ – NO
1 2 3 4
1 2 3 4
5 6 7
TB1
TB2
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc 5-120Vrms
46
45
47 48
49
LCDT
Terminal Block
50
RESET
–
CD Ignition
90-350VDC
+
—
IGN
C NC + – NO
1 2 3 4
1 2 3 4
5 6 7
TB1
TB2
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc 5-120Vrms
OVERSPEED OUTPUT WIRING continued
Figure 8: SHD30 models Normally Closed Relay output to LCDT-NC
Figure 7: SHD30 models Normally Open SCR output to MARK IV
Figure 9: SHD30 models Normally Open S.C.R. output to LCDT-NO
SHD30 models to be installed in accordance with NEC code for
Cl. I, Div. 2 Grps. C & D hazardous locations.
SHD30 to be installed in
accordance with NEC code
for Cl. I, Div. 2 Grps. C & D
hazardous locations.
SHD30 models to be installed in accordance with NEC code for
Cl. I, Div. 2 Grps. C & D hazardous locations.
1 G 2 3 1 G 2 3
SW
ALT 2
ALT 1
GRD
Pressure Overspeed Level
1 2 3
1 2 3 4 5 6
65-02-0155
Adapter
Package
Emergency
Stop Switch
Frame Ground
307PHCD
TATTLETALE
®
Connect to
Good Engine
Ground
CD Ignition
90-350 VDC + –
SWICHGAGE ®
1 G 2 3
SHD30
+
–
C NC + – NO
1 2 3 4
1 2 3 4
5 6 7
TB1
TB2
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter
7
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc 5-120Vrms
1 G 2 3 1 G 2 3 1 G 2 3
SW
ALT 2
ALT 1
GRD
Pressure Overspeed Level
1 2 3
1 2 3 4 5 6
65-02-0127
Adapter
Package
Emergency
Stop Switch
Frame Ground
307PHCD
TATTLETALE
®
Connect to
Good Engine
Ground
CD Ignition
90-350 VDC + –
SWICHGAGE ®
SHD30
+
–
C NC + – NO
1 2 3 4
1 2 3 4
5 6 7
TB1
TB2
TB2
1 NO
2 C
3 NC
4 +Overspeed SCR
5 –Overspeed SCR
6
Reset Hourmeter 7
TB1
1 MPU +
2 MPU –
3 NEG 90-300vdc
4 POS 90-300vdc 5-120Vrms
Figure 10: SHD30 models with Normally Open S.C.R. output typical
wiring for negative ground ignition systems.
Figure 11: SHD30 models with Normally Open S.C.R. output typical
wiring for positive ground ignition systems.
Shown below is the SHD30 models with SCR output connected to TAT-
TLETALE
® magnetic switches and SWICHGAGE ® instruments using an
adapter package. Figure 10 shows a typical wiring for negative ground
ignition. Figure 11 shows a typical wiring for positive ground ignition.
TYPICAL WIRING FOR CONTROL PANEL
SHD30 models 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.
WARNING: Overspeed relay contact for use with Frank W.
Murphy Mfr. non-incendive or intrinsically safe products only.