Marathon Computer AACC 2000 manual Environmental ratings, Equipment ratings

	Marathon Monitors Inc.
Technical Specification
Environmental ratings
Panel sealing:	Instruments are intended to be panel mounted. The
	rating of panel sealing is IP65, (EN 60529), or 4X, (NEMA
	250).
Operating temperature:	0 to 55oC. Ensure the enclosure provides adequate
ventilation.
Relative humidity:	5 to 95%, non condensing.
Atmosphere:	The instrument is not suitable for use above 2000m
	or in explosive or corrosive atmospheres.
Equipment ratings
Supply voltage:	100 to 240Vac -15%, +10%, or optionally:
Supply frequency:	48 to 62Hz.
Power consumption:	15 Watts maximum.
Relay 2-pin (isolated):	Maximum: 264Vac, 2A resistive. Minimum: 12Vdc, 100mA.
Relay changeover (isolated): Maximum: 264Vac, 2A resistive. Minimum: 6Vdc, 1mA.
Triac outputs (isolated):	30 to 264Vac. Maximum current: 1A resistive.
Leakage current:	The leakage current through triac and relay contact
	suppression components is less than 2mA at 264Vac, 50Hz.
Over current protection:	External over current protection devices are required that
	match the wiring of the installation. A minimum of 0.5mm2 or
	16awg wire is recommended. Use independent fuses for the
	instrument supply and each relay or triac output. Suitable
	fuses are T type, (EN 60127 time-lag type) as follows;
	Instrument supply: 85 to 264Vac, 2A, (T).
	Relay outputs: 2A (T). Triac outputs: 1A (T).
Low level i/o:	All input and output connections other than triac and relay are
	intended for low level signals less than 42V.
Single logic output:	18V at 24mA. (Non-isolated.)
DC output (Isolated):	0 to 20mA (600Ω max), 0 to 10V (500Ω min).
DC output (Non isolated):	0 to 20mA (600Ω max), 0 to 10V (500Ω min).
Fixed digital inputs:	Contact closure. (Non isolated.)
Triple contact input:	Contact closure. (Isolated.)
Triple logic input:	11 to 30Vdc. (Isolated.)
DC or 2nd PV input:	As main input plus 0-1.6Vdc, Impedance, >100MΩ.
	(Isolated.)
Potentiometer input:	0.5V excitation, 100Ω to 1.5kΩ Potentiometer. (Isolated.)
Transmitter supply:	24Vdc at 20mA. (isolated.)
Strain gauge supply:	10Vdc. Minimum bridge resistance 300Ω. (Isolated.)
Digital Communications:	EIA-232, 2-wire EIA-485 or 4-wire EIA-485 (All isolated).

AACC 2000 Carbon 8 Nov. 1, 1997