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Keystart 9620 series control modules provide manual start/stop and automatic fault protection for generators, pumps and other engine-driven applications.
Operator control is by a 3 position keyswitch, with the key removable only in the Stop/Reset (O) position. Outputs are provided for the control of engine fuel (energised to run), starter motor and preheat. The Keystart also has an alarm output for remote/audible warning of faults.
Indication of engine status and faults is by six LEDs and pictograms. Four switch inputs (closing to negative on fault) provide for automatic shutdown on engine low oil pressure, high coolant temperature and auxiliary faults. Model 9621 has a fully adjustable engine overspeed shutdown feature, configurable for either generator AC or magnetic pickup speed signals. Charge alternator excitation and a charge fail warning LED are fitted as standard.
Electrical connection is by quick-connect, spring-clamp terminal blocks. A universal 7 to 30VDC power supply allows operation with 12 or 24VDC engine batteries, with engine crank-dip voltage protection fitted as standard.
Keystarts are front-of-panel mounted through a standard square cut-out, and secured at the rear with quick-fit clips. Epoxy-resin case encapsulation gives superior vibration/ shock resistance and environmental protection.
Fault switch inputs: close to negative DC during fault
–ve input defined as: –1V to +1V w.r.t. – ve DC supply
Speed sensing inputs (model 9621 only):
(all ratings non-reactive)
Run (fuel), preheat: positive DC, NO relay contacts, 10 A max. @ 24 V DC
Start (crank): positive DC via keyswitch contacts, 10 A max. @ 24V DC
Alarm: negative DC (open collector NPN transistor), 250mA max.
Speed calibration: to suit 0 – 1 mA, 75 Ohm meter, output = 0.75mA at rated engine speed
Preheat timer: 0 or 10 secs (links J1 & J4), default = 0 secs
Fault Override Timer: 2 to 20 secs (VR1), default = 10 secs
Overspeed Trip Level: 100 to 130 % (VR3) of nominal speed calibration (VR2),
default = 110% (of 50 or 60 Hz)
Overall dimensions (w x h x d): 96 x 96 x 95 mm / 3.8 x 3.8 x 3.7 in.
Panel cut-out size: DIN 92 x 92 mm / 3.6 x 3.6 in.
Weight: approx. 300 g / 0.7 lb
Operating Temperature: –35°C to +55°C / –31°F to 131°F
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