ABB ACQ800 Series, Руководство по оборудованию

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ACQ800-37 Hardware Manual 81
Motor control and I/O board (RMIO)
RMIO board specifications
Analog inputs
With Pump Control Program two programmable differential current inputs (0 mA /
4 mA to 20 mA,
R
in
= 100 ohm) and one programmable differential voltage input
(-10 V / 0 V / 2 V to +10 V, R
in
> 200 kohm).
The analog inputs are galvanically isolated as a group.
Isolation test voltage 500 V AC, 1 min
Max. common mode voltage
between the channels ±15 V DC
Common mode rejection ratio > 60 dB at 50 Hz
Resolution 0.025 % (12 bit) for the -10 V to +10 V input. 0.5 % (11 bit) for the 0 to +10 V and 0 to
20 mA inputs.
Inaccuracy ± 0.5 % (Full Scale Range) at 25
°
C (77
°
F). Temperature coefficient: ± 100 ppm/
°
C
(± 56 ppm/°F), max.
Constant voltage output
Voltage +10 V DC, 0, -10 V DC ± 0.5 % (Full Scale Range) at 25 °C (77
°
F). Temperature
coefficient: ± 100 ppm/°C (± 56 ppm/°F) max.
Maximum load 10 mA
Applicable potentiometer 1 kohm to 10 kohm
Auxiliary power output
Voltage 24 V DC ± 10 %, short circuit proof
Maximum current 250 mA (shared between this output and optional modules installed on the RMIO)
Analog outputs
Two programmable current outputs: 0 (4) to 20 mA, R
L
< 700 ohm
Resolution 0.1 % (10 bit)
Inaccuracy ± 1 % (Full Scale Range) at 25
°
C (77
°
F). Temperature coefficient: ± 200 ppm/
°
C
(± 111 ppm/
°
F) max.
Digital inputs
With Pump Control Program six programmable digital inputs (common ground: 24 V
DC, -15 % to +20 %) and a start interlock input. Group isolated, can be divided in two
isolated groups (see
Isolation and grounding diagram below).
Thermistor input: 5 mA, < 1.5 kohm “1” (normal temperature), > 4 kohm “0”
(high temperature), open circuit “0” (high temperature).
Internal supply for digital inputs (+24 V DC): short circuit proof. An external 24 V DC
supply can be used instead of the internal supply.
Isolation test voltage 500 V AC, 1 min
Logical thresholds < 8 V DC “0”, > 12 V DC “1”
Input current DI1 to DI 5: 10 mA, DI6: 5 mA
Filtering time constant 1 ms