Marathon Computer AACC 2000 - Manual (Page 8)

Marathon Monitors Inc.
AACC 2000 Carbon Nov. 1, 1997
8
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 55
o
C. 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 0.5mm
2
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 (600
Ω
max), 0 to 10V (500
Ω
min).
DC output (Non isolated): 0 to 20mA (600
Ω
max), 0 to 10V (500
Ω
min).
Fixed digital inputs: Contact closure. (Non isolated.)
Triple contact input: Contact closure. (Isolated.)
Triple logic input: 11 to 30Vdc. (Isolated.)
DC or 2
nd
PV input: As main input plus 0-1.6Vdc, Impedance, >100M
Ω
.
(Isolated.)
Potentiometer input: 0.5V excitation, 100
Ω
to 1.5k
Ω
Potentiometer. (Isolated.)
Transmitter supply: 24Vdc at 20mA. (isolated.)
Strain gauge supply: 10Vdc. Minimum bridge resistance 300
Ω
. (Isolated.)
Digital Communications: EIA-232, 2-wire EIA-485 or 4-wire EIA-485 (All isolated).