A completely unattended startup/shutdown and run controller for engine driven equipment. This user friendly, compact, state-of-the-art microprocessor based controller, covers all basic start stop operations plus other features only found on more sophisticated and expensive controllers.
The A91 is designed to operate from a 12 or 24 volt battery, and requires a magnetic sensor (pickup) for speed detection.
■ Microprocessor Based Automatic Controller
■ Field Programmable Trip Points
■ Five LED Signal Indicators
■ Startup Lockout Timer
■ Interfaces With Other Existing Murphy Products
■ NEMA 3R “Weatherproof” Enclosure
- Authorized Distributor
- Genuine Parts
- Service and Support
ower Input: 12 or 24 VDC nominal (specify).
Standby Power Consumption: <50mA.
Magnetic Pickup Input: Requires 2 V rms minimum.
Sensor Input Polarity: Negative (-).
Outputs: Five (5) open collector transistor 500 mA sink.
Two (2) relay, 5 Amp maximum at 12 or 24 VDC (sourcing).
Reverse Polarity Protection: 200 volt peak reverse voltage.
On-board Memory: 8k PROM (programmable, read only memory); data retention 10 years.
Operating Temperature Range: -20 to 140°F (-25 to 60°C).
Operating Humidity Range: 0-95% Non-Condensing
User Trip point Adjustments: Five (5) on-board potentiometers (320° turn).
Test-Off-Automatic Toggle Switch: Three position switch for:
- Test: Starts engine in automatic mode and runs until switched “off” or emergency shutdown occurs.
- Off: Disconnects all power to control circuits, Stop/disables engine from starting and resets shutdown indicators.
- Auto: Automatic start/stop sequencing is initiated by external switches and signals.
Cycle Crank Timer: 5 crank attempts 7 seconds each; 4 rest periods 15 seconds each, before overcrank.
Overspeed Trip Point Setting: From 2500-9000 Hz.
Crank Disconnect Speed Setting: From 400-2500 Hz.
Shutdown Time Delay: 15 seconds after engine start; locks out low lube oil and high temperature.
Engine Run LED: Turns“on”when crank disconnect occurs.
Shutdown Output: Removes DC output or operates dry relay contacts for engine shutdown (depending on model used).
Start/Stop: SPDT momentary; or SPST maintained switches.
Warmup Time Delay: Field adjustable from 0-300 seconds to load the engine after warmup (model -WC only).
Cooldown Time Delay: Field adjustable from 0-300 seconds (model -WC only).
Enclosure: Weatherproof NEMA 3R.
Enclosure Coating: Red enamel.
Subpanel Coating: White enamel.