IFM CR720S, Original Operating Instructions

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CR720S CR721S
36
ifm electronic gmbh ● Friedrichstraße 1 ● 45128 Essen We reserve the right to make technical alterations without prior notice! 26/11/2020 CR721S / page 6
CR721S (HW version: V1.0.5.x) ST A and ST B / input characteristics
Control systems
ST A:
IN0000...0003
IN0500...0503
ST B:
IN1000...1003
IN1500...1503
Resolution 12 bits
Digital inputs, frequency measure-
ment
(IN FREQUENCY-B)
Frequency input (FRQ
L/H
)
Input resistance 10 kΩ
Input frequency Mode min.
(Hz)
max.
(kHz)
IN_PERIOD_RATIO_CSx 0.01 5.0
IN_PERIOD_RATIO_US_CSx 0.1 5.0
IN_FREQUENCY_CSx 0.5 30.0
IN_COUNT_CSx 0.0 30.0
IN_INC_ENCODER_CSx 0.0625 5.0
IN_PHASE_CSx 0.0625 5.0
Switch-on level > 0.7 VBB
30
Switch-off level < 0.3 VBB
30
Accuracy ± 10 µs
Voltage input 0...10 V (A) Input resistance 67.6 kΩ
Range diagnostics min./max. 0 V / 10 V (default)
Accuracy ± 1 % FS
Digital input (B
L/H
)
(default: B
L
)
Input resistance 10 kΩ
Input frequency < 330 Hz
Switch-on level > 0.7 VBB
30
Switch-off level < 0.3 VBB
30
Accuracy B
L
/ B
H
± 1 % FS / ± 3 % FS
Range diagnostics configurable minimum and maximum values
for the measuring range to detect short circuit
to VBB and short circuit to GND / wire break
Range diagnostics min./max. 1 V / 0.95 VBB
30
(default)
ST A:
IN0400...0401
IN0900...0901
Resolution 12 bits
Input frequency < 330 Hz
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/ resistor inputs
(IN RESISTOR-A)
Digital input (B
L
)
(default)
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)