Murphy Keystart 9700 specifications Power supply, Inputs, Outputs, Adjustable settings, General

R	M010901
The Generator Controls Division of	Issue 5, revised 04/99
	Catalogue section 75

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

Operation

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:-

STOP Removes power from the Keystart, stopping the 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.

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.

AUX (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

Product Specifications

Power supply:

Operating voltage:	(12V setting)		(24V setting)
Steady state	9 – 20 V DC		18 – 33 V DC
Brown out / cranking	<= 5V for 2 secs		<= 10V for 2 secs
Current consumption	<		150mA
Inputs:
Fault switch inputs:-	selectable: open or closed, + ve or – ve
+ ve input defined as:	80% to 100% of +ve DC supply
– ve input defined as:	–1V to +2V w.r.t –ve DC supply
Speed sensing inputs:-
Magnetic pickup	10 – 60 VAC peak, < 2300 to > 3400 Hz.
AC alternator	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 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,
Adjustable settings:	output = 0.75mA at rated engine speed
Fault Override timer	< 10 to > 30 secs.
Overspeed trip level	< 100 to >130 % of calibrated speed
General:
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	–10oC to +55oC
Case sealing		IP22
Vibration	1G, 50 Hz to 5 kHz.
Chemical/fire	case: glass filled Noryl,
	self extinguishing, non-dripping.
	facia: polycarbonate

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.