ABB ACS800-04, Hardware Manual

Page: 69 / 118

Motor control and I/O board (RMIO)
69
RMIO board specifications
Analogue inputs
With Standard Control Program two programmable differential current inputs (0 mA /
4 mA ... 20 mA,
R
in
= 100 ohm) and one programmable differential voltage input (-
10 V / 0 V / 2 V ... +10 V, R
in
= 200 kohm).
The analogue inputs are galvanically isolated as a group.
Insulation test voltage 500 VAC, 1 min
Max. common mode voltage
between the channels ±15 VDC
Common mode rejection ratio > 60 dB at 50 Hz
Resolution 0.025% (12 bit) for the -10 V ... +10 V input. 0.5% (11 bit) for the 0 ... +10 V and 0 ...
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 VDC, 0, -10 VDC ± 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 VDC ± 10%, short circuit proof
Maximum current 250 mA (shared between this output and optional modules installed on the RMIO)
Analogue 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 Standard Control Program six programmable digital inputs (common ground:
24 VDC, -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 VDC): short-circuit proof. An external 24 VDC
supply can be used instead of the internal supply.
Insulation test voltage 500 VAC, 1 min
Logical thresholds < 8 VDC “0”, > 12 VDC “1”
Input current DI1 to DI 5: 10 mA, DI6: 5 mA
Filtering time constant 1 ms