Murphy AS705S dimensions Key features, Operation, Control Outputs

R	M011101
The Generator Controls Division of	Issue 6, revised 06/99
	Catalogue section 75
	(MS5258)

AUTOSTART 705 (AS705S series)

PROGRAMMABLE GENERATOR CONTROLLER

The Autostart 705 provides the control features for the automatic or manual starting, load transfer and shutdown of a standby diesel generator or pump. The AS705 is a micro- processor based controller, giving full programmability of timers, trip levels and control options, with front facia LEDs for the indication of generator status and faults.

Key features

∙Automatic or manual operation, selected by rotary switch (key-switch available as an option).

∙17 LED status and fault indicators, including 5 LEDs

for custom programming and labelling

∙RS232 communications link for engine monitoring, control and Autostart programming from local PC

∙Comprehensive fault protection and alarm system:– low oil pressure, high engine temperature, overspeed, underspeed, charge fail, emergency stop, start fail, high and low battery voltage, 3 programmable fault inputs.

∙6 programmable outputs, allowing remote signalling and control of over 30 different functions.

∙Pin compatibility with Autostart 710 and Keystart 9700 ranges, allowing standardisation of panel wiring.

∙96 x 96mm DIN standard, front panel mounted case

Operation

Autostart’s operating mode is selected by use of its 3 position front facia switch:–

Off/reset. Disables the engine and resets a latched fault condition.

Automatic start-up, load transfer and return to standby in response to a mains fail or remote start condition, with full fault protection.

Manual start and stop of the generator, either immediately on selecting manual mode or by use of remote push button switches.

Green and amber LEDs around the switch indicate the selection of Auto and Manual modes. On keyswitch versions, the key is common to all units and may be removed in the Off and Auto positions only.

Control Outputs

The following are provided:-

∙Single pole, switched +ve relay outputs for the control of engine fuel and starter motor circuits.

∙Switched +ve outputs for signalling auto and manual modes, plus a –ve DC output for Off/reset.

∙6 function programmable outputs (see overleaf).

Fault Protection and Alarm System

In Auto or Manual modes, Autostart will shut down and latch out the generator on detection of low oil pressure, high engine temperature, overspeed, start fail or emergency stop faults. The Autostart may also be set up to shut down the generator on low generator frequency or speed.

3 additional inputs may be used with remote fault switches (giving a ‘shutdown’ or ‘warning’ response), or as control inputs with remote contacts or panel switches (see overleaf).

Non-latching, 'warning only' alarms are fitted for high and low battery volts, charge fail and mag. pickup fail conditions.

Product Specification

Power supply:

Operating voltage: steady state range	5 – 40 V DC continuous
crank brown-out	to 0V for <= 100 mSec
Current consumption	typically 150 mA
Inputs:
DC inputs (inputs 1 - 5, remote start)
positive input voltage range	80% to 100% of battery +ve
negative input voltage range	–1V to +2V w.r.t. battery –ve
Generator AC input:-
operating voltage range	90 – 300 V AC rms
frequency measurement range	0 – 99 Hz.
Magnetic pickup:-
operating voltage range	7 – 80 V AC rms
frequency measurement range	0 to 10 kHz
Outputs:	(all ratings for resistive load)
Start and fuel relays	+ ve DC (switched SPNO contact)
	rated 16A max. @ 24V DC
Programmable outputs 1 – 3	– ve DC (open collector transistor)
	rated 250mA max. @ 33 VDC
Programmable output 4	– ve DC (switched SPNO contact)
	rated 5A max. @ 24V DC
Programmable output 5	+ ve DC (switched SPNO contact)
(default setting: Common Alarm)	rated 5A max. @ 24V DC
Programmable output 6	volt free SPNO contacts
(default setting: Gen. contactor)	rated 5A max. @ 240V AC
Auto & Manual outputs	+ ve DC, 250mA max.
Off/reset output	– ve DC, 250mA max.
Physical:
Overall dimensions (W x H x D)	96 x 96 x 162 mm
Panel cut-out size	DIN standard 92 x 92 mm
Weight	approx. 650 g
Operating ambient temperature	–10 to +55 oC
Case sealing	IP22

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.