Murphy Keystart 9700 Folheto

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

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.

Control of the Keystart and engine is by use of a 3 or 4
position keyswitch on the front facia:-

Removes power from the Keystart, stopping the
engine and resetting a latched fault condition.

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.

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.

(optional: 'A' models only) Provides a switched
+ve DC output, used for preheat circuits or
auxiliary control (remote power up) of Keystart.

The key is common to all Keystarts and is removable
only in the STOP position.

The front facia also has five LED and pictogram indicators
for the display of engine fault status:-

Low Oil Pressure

High Engine Temperature

Overspeed (or Plant Fail on non-overspeed units)

Charge Fail

Plant Fail

R

M010901

Issue 5, revised 04/99

Catalogue section 75

Operating voltage:

   Steady state

   Brown out / cranking

(12V setting)

9 – 20 V DC

<= 5V for 2 secs

(24V setting)

18 – 33 V DC

<= 10V for 2 secs

Current consumption

< 150mA

Fault switch inputs:-

selectable: open or closed, + ve or – ve

Speed sensing inputs:-

Magnetic pickup

AC alternator

10 – 60 VAC peak, < 2300 to > 3400 Hz.

90 – 350 VAC rms, < 50 to > 60 Hz. nom.

Run relay output

volt-free SPCO relay contacts

16 A max. @ 24V DC

Start output

+ ve DC (switched)

16 A max. @ 24V DC

Auxiliary/preheat output

+ ve DC (switched)

15 A max. @ 24V DC

Alarm output

– ve DC (open collector transistor)

300mA max. @ 33V DC max.

Tachometer / calibration

To suit 0 – 1 mA, 75 Ohm meter,

output = 0.75mA at rated engine speed

Fault Override timer

< 10 to > 30 secs.

Overspeed trip level

< 100 to >130 % of calibrated speed

Overall dimensions (w x h x d)

96 x 96 x 130 mm

Panel cut-out size

DIN 92 x 92 mm

Weight

approx. 500 g

Operating ambient temperature

–10

o

C to +55

o

C

Case sealing

IP22

Vibration

1G, 50 Hz to 5 kHz.

Chemical/fire

case: glass filled Noryl,

self extinguishing, non-dripping.

facia: polycarbonate