CR720S CR721S
37
ifm electronic gmbh ● Friedrichstraße 1 ● 45128 Essen We reserve the right to make technical alterations without prior notice!
26/11/2020
CR721S / page 7
CR721S (HW version: V1.0.5.x)
ST A and ST B / input characteristics
Control systems
Resistor input (R)
Measuring current
< 2.0 mA
Measuring range
0.016...30 kΩ
Accuracy
± 2 % FS: 0.016...3 kΩ
± 5 % FS: 3...15 kΩ
± 10 % FS: 15...30 kΩ
Range diagnostics min./max.
0 Ω / 31 kΩ
(default)
ST B:
IN1200... 1203
IN1400... 1403
IN1700... 1703
IN1800... 1803
Resolution
12 bits
Input frequency
< 330 Hz
Impedance
≤ 10 kΩ
Range diagnostics
configurable minimum and maximum values
for the measuring range to detect short circuit
to VBB and short circuit to GND / wire break
Digital inputs
(IN DIGITAL-A)
Digital input (B
L
)
Input resistance
10 kΩ
Switch-on level
> 0.7 VBB
30
Switch-off level
< 0.3 VBB
30
Accuracy B
L
± 1 % FS
Range diagnostics min./max.
1 V / 0.95 VBB
30
(default)
ST A:
IN0300... 0301
IN0800... 0801
ST B:
IN1300... 1303
Resolution
12 bits
Input frequency
< 330 Hz
Impedance
≤ 3.2 kΩ
Range diagnostics
configurable minimum and maximum values
for the measuring range to detect short circuit
to VBB and short circuit to GND / wire break
Digital inputs 2-wire sensor
(IN DIGITAL-B)
Digital input (B
L
)
Input resistance
≤ 3.2 kΩ
Switch-on level
> 0.7 VBB
30
Switch-off level
< 0.3 VBB
30
Accuracy B
L
± 1 % FS
Range diagnostics min./max.
1 V / 0.95 VBB
30
(default)
RESET-COM
Switch-on level
> 0,7 VBB
30
Switch-off level
< 0,3 VBB
30
Accuracy
± 5 % FS
Observe the notes on the configuration of the inputs/outputs!
(programming manual "ecomatController CR721S")
GB
