7.4.1 Technical data
Digital inputs
Parameter Value
Voltage -3 V to 30 V
Typical power consumption 9 mA at 24 VDC
Signal level (including ripple) High: 15 V to 30 V
Low: -3 V to 5 V
Maximum signal propagation times L → H: 50 μs
H → L: 150 μs
Galvanic isolation Yes:
The reference potential is terminal 2M at X122/X132.
The reference potential is terminal 4M at X242/X252.
Digital outputs
Parameter Value
Voltage 24 V
Load current per output, maximum 500 mA continuously short-circuit proof
Output delay (typ./max.) 1) L → H: 150 μs / 400 μs
H → L: 75 μs / 100 μs
Input delay (typ.) of inputs / "rapid inputs" L → H: 50 μs
H → L: 300 μs for 10 kΩ load
Switching frequency for resistive load: max. 100 Hz
for inductive load: max. 2 Hz
for lamp load: max. 11 Hz
max. lamp load 5W
Bidirectional digital inputs/outputs
Parameter Value
As input:
Voltage -3 V to 30 V
Typical power consumption 10 mA at 24 VDC
Signal level (including ripple) High: 15 V to 30 V
Low: -3 V to 5 V
Maximum signal propagation times (fast in‐
puts)
L → H: 10 μs
H → L: 150 μs
Galvanic isolation Yes: The reference potential is terminal 1M.
As output:
Voltage 18 V to 30 V
Maximum output current for one load (resis‐
tive)
0.5 A
Interface description
7.4 Digital inputs/outputs
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA 75
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