Control Outputs
The following are provided:-
Rear Facia Settings & Electrical Connection
∙Switched +ve RUN relay and START outputs, used for controlling the engine fuel and starter motor circuits.
∙A
Fault protection and Alarm System
After the operator has started the engine and the fault override timer has expired, the Keystart monitors for engine and plant faults through remotely connected switch sensors.
Dedicated inputs are provided for Low Oil Pressure and High Engine Temperature switch sensors. 1 or 2 additional inputs may be used for general purpose ‘plant fail’ contacts. Switches at the rear allow the inputs to be configured for use with remote contacts which either open or close during fault, with wiring polarity to either +ve or
The Keystart may optionally be fitted with an engine overspeed trip, available in alternator sensing (generator AC, 50/60Hz) or magnetic pickup sensing variants.
+ve |
VR1 |
VR2 |
VR3 |
Tachometer/calibration output:–
0 – 1mA into 75 meter
VR1: Nominal speed calibration:–
With engine running at normal speed, adjust VR1 until calibration meter reads 0.75mA.
VR2: Overspeed trip level:–
100 - 130% of nominal calibrated speed, clockwise to increase
VR3: Fault override timer:–
<10 to > 30 seconds clockwise to increase
Switch Settings (N.B. |
| = up |
| = down) |
S1 | Fault Inputs:– | S2 | S3 | S4 |
Not |
|
| Supply:– | |
Used | closed |
|
| 12 V DC |
| closed +ve |
|
| 24 V DC |
| open |
|
|
|
| open +ve |
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|
|
If any of the above faults occur, Keystart will:-
∙turn off its RUN output (stopping the engine)
∙indicate the fault on the appropriate front facia LED
∙activate its Alarm output (to remotely signal that a fault has occurred).
The automatic fault shutdowns operate on a
Charge Fail Warning
A charge failure warning LED is provided for use with an
1– ve DC power supply
2Charge fail input
3 +ve DC power supply
4Aux. input ('A' option)
5Mag. pickup input (KEY9701 only)
6Alarm output:
7- No connection -
8- No connection -
9- No connection -
10- No connection -
11- No connection -
12- No connection -
13- No connection -
14- No connection -
15Aux./preheat output: +ve DC ('A' option only)
16 | Input 1: Low Oil Pressure |
17 | Input 2: High Engine Temp. |
18 | Input 3: Plant Fail (9700 only) |
19 | Input 4: Plant Fail |
20- No connection -
22Fuel output: + ve DC, 16A max.
23Start output: + ve DC, 15A max.
24- No connection -
25- No connection -
26- No connection -
27- No connection -
28- No connection -
29L Generator AC: 90 - 300 VAC
30N (KEY9702 only)
engine driven charge alternator. The charge alternator’s WL terminal is connected to the Keystart, which will in turn monitor the WL voltage and provide the alternator with excitation current at engine start up.
Note:–
Pin 5 is not used on models 9700 and 9702.
Pin 18 is not used on overspeed models 9701 and 9702. Pins 29 and 30 are not used on models 9700 and 9701.
Installation
The Keystart uses a DIN standard 96 x 96 mm casing, designed for mounting in a control panel
Also at the rear is are 4 switches for the setting of the supply voltage and alarm input configurations, and up to 3 potentiometers: one to set the fault ‘override’ time (all units), and 2 more to set the speed calibration and overspeed trip level, where fitted.
When ordering, please specify:–
a) Base unit type:-
Keystart 9700: no overspeed
Keystart 9701: magnetic pickup sensing overspeed
Keystart 9702: AC alternator (50/60Hz) overspeed
b) Options:-
‘A’: auxiliary control/preheat option
N.B: stock units are supplied with switch settings for 24VDC power supply, inputs closing to
Typical Connection Circuit
+ VE DC
| Emergency |
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| ||
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| Stop |
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| RAL | alarm |
| Generator AC |
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| (KEY9702 only) | 29 | 3 | 6 |
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| |
| L | (’A’ option only) |
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| N | 30 |
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| 15 |
| |
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| Aux |
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+ |
| Start | 15 | Remote | |||
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| Start | |||||
| WL | Stop | |||||
| 2 |
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| Run |
| Run | ||
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– | Magnetic pickup |
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| 4 |
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| (KEY9701 only) |
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| Start | |
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| 5 |
| RUN | 22 | ||
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| 16 |
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| LOP | 17 |
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| 23 | RFL | fuel |
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| 19 |
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| HET | + | – | 1 |
| RST | starter |
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| |
| Fail |
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| RPH | preheat |
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| (’A’ option | ||
| Plant |
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| ||
| RPM/Calib. |
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| only) | |||
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| Meter |
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– VE DC
Since 1939
Frank W. Murphy Manufacturer
PO Box 470248, Tulsa, Oklahoma 74147, USA Tel: + 1 918 627 3550 Fax: + 1 918 664 6146 email: sales@fwmurphy.com
web: http://www.fwmurphy.com
Frank W. Murphy Ltd. | Frank W. Murphy Ltd. en France | Frank W. Murphy Southern Division | Murphek Pty. Ltd. | |
Incorporating Modex Automation | Tel: +33 (1) 30 76 26 26 Fax: +33 (1) 30 76 39 89 | PO Box 1819, Rosenberg, Texas 77471, USA | 1620 Hume Highway, Campbellfield, Vic. 3061 Australia | |
Church Road, Laverstock, Salisbury U.K. | Direct usine Tel: + 44 1722 410697 | Tel: + 1 281 342 0297 Fax: + 1 281 341 6006 | Tel: + 61 3 9358 5555 Fax: + 61 3 9358 5558 | |
Tel: + 44 1722 410055 Fax + 44 1722 410088 | email: sales@fwmurphy.co.uk | email: sales@fwmurphy.com | email: murphy@macquarrie.com.au | |
Pour service en Français, tél: + 44 1722 410697 | Frank W. Murphy Pte, Ltd. | Murphy Switch of California |
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Murphy de Mexico S.A. de C.V. |
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email: sales@fwmurphy.co.uk | No. 2 Tuas South Street 2, Sprintecs Building | PO Box 900788, Palmdale, California 93590, USA | Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje |
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web: http://www.fwmurphy.co.uk |
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Tel: + 1 805 272 4700 Fax: + 1 805 947 7570 | San Luis Potosí, S.L.P. México 78384 |
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| Tel: + 65 863 1398 Fax: + 65 863 0208 | email: sales@murphyswitch.com | Tel: + 52 48 206264 Fax: + 52 48 206336 |
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| email: fwmsales@fwmurphy.com.sg | web: http://www.murphyswitch.com | email: murmexsl@sanluis.podernet.com.mx |
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