Murphy Portable Generator Keystart 9700 User Manual

M010901  
Issue 5, revised 04/99  
Catalogue section 75  
R
The Generator Controls Division of  
KEYSTART 9700 series  
MANUAL START ENGINE CONTROLLER WITH  
AUTOMATIC FAULT PROTECTION SHUTDOWN  
The Keystart 9700 range provides for the manual starting and  
stopping of a standby engine - a generator, pump or other  
application - with automatic monitoring and shutdown of the  
engine in the event of a fault.  
The 9700 series is pin compatible with the Autostart range:  
this allows the use of standard wiring for both manual and  
automatic control panels, simplifying panel design and  
permitting easy upgrades from a manual to fully automatic  
control system.  
Key features  
·
·
Keyswitch operation for enhanced security  
Up to four fault inputs, configurable for use with contacts  
which open or close on fault, with wiring to +ve or –ve DC  
·
Options for overspeed protection (magnetic pickup or  
AC alternator driven) and preheat/auxiliary control.  
·
·
·
Pin compatible with Autostart 705, 710, 720 and 730 series.  
96 x 96mm DIN standard, front panel mounted case  
Switchable 12 or 24 V DC power supply  
Product Specifications  
Operation  
Power supply:  
The Keystart is powered from the engine battery or similar  
low voltage DC source. A switch at the rear allows for 12V  
or 24V operation.  
Operating voltage:  
Steady state  
Brown out / cranking  
Current consumption  
(12V setting)  
9 – 20 V DC  
<= 5V for 2 secs  
(24V setting)  
18 – 33 V DC  
<= 10V for 2 secs  
Control of the Keystart and engine is by use of a 3 or 4  
position keyswitch on the front facia:-  
< 150mA  
Inputs:  
STOP Removes power from the Keystart, stopping the  
Fault switch inputs:-  
+ ve input defined as:  
ve input defined as:  
Speed sensing inputs:-  
Magnetic pickup  
AC alternator  
selectable: open or closed, + ve or – ve  
80% to 100% of +ve DC supply  
–1V to +2V w.r.t –ve DC supply  
engine and resetting a latched fault condition.  
RUN  
Energises the Keystart’s RUN relay (enabling  
the engine fuel or ignition). The fault ‘override’  
timer begins as soon as the key is turned (or  
spring returns) to this position. Once the engine  
is fully running, Keystart monitors for faults and  
shuts down the engine if a fault is detected.  
10 – 60 VAC peak, < 2300 to > 3400 Hz.  
90 – 350 VAC rms, < 50 to > 60 Hz. nom.  
Outputs:  
(all ratings for resistive load)  
Run relay output  
volt-free SPCO relay contacts  
16 A max. @ 24V DC  
START Maintains fuel to the engine, and activates the  
START output (used for controlling the starter  
motor circuit). This position is spring-biased to  
return to the RUN position when the operator  
releases the key.  
Start output  
+ ve DC (switched)  
16 A max. @ 24V DC  
+ ve DC (switched)  
15 A max. @ 24V DC  
Auxiliary/preheat output  
Alarm output  
AUX  
(optional: 'A' models only) Provides a switched  
+ve DC output, used for preheat circuits or  
auxiliary control (remote power up) of Keystart.  
ve DC (open collector transistor)  
300mA max. @ 33V DC max.  
To suit 0 – 1 mA, 75 Ohm meter,  
output = 0.75mA at rated engine speed  
Tachometer / calibration  
The key is common to all Keystarts and is removable  
only in the STOP position.  
Adjustable settings:  
Fault Override timer  
Overspeed trip level  
< 10 to > 30 secs.  
< 100 to >130 % of calibrated speed  
The front facia also has five LED and pictogram indicators  
for the display of engine fault status:-  
General:  
Low Oil Pressure  
Overall dimensions (w x h x d)  
Panel cut-out size  
Weight  
Operating ambient temperature  
Case sealing  
Vibration  
Chemical/fire  
96 x 96 x 130 mm  
DIN 92 x 92 mm  
High Engine Temperature  
Overspeed (or Plant Fail on non-overspeed units)  
Charge Fail  
approx. 500 g  
–10oC to +55oC  
IP22  
1G, 50 Hz to 5 kHz.  
case: glass filled Noryl,  
self extinguishing, non-dripping.  
facia: polycarbonate  
Plant Fail  
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.  
 

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