Motor control and I/O board (RMIO) 89
RMIO board specifications
Analogue inputs
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 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 ... +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 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 option 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
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.
Insulation 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
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