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11.1.4
Digital inputs/outputs
Number
Input or output
Input
Level
Sampling rate
Potential-free contact
High-speed input
Usable inputs
Function
Max. counting frequency
Mark-to-space ratio
Accuracy for
flow measurement
Output
Output signal
Current
Auxiliary voltage supply
Voltage
Current
11.1.5
Relays
Number
Relay (changeover contact)
Switching capacity
Contact life
Max. 12 (see connection diagram)
Individually configurable as input or output
Logic level 0: < 3.5 V; logic level 1: > 10 V
125 ms (max. counting frequency: 4 Hz)
: < 1 kΩ; R
: > 50 kΩ (use of auxiliary voltage 24 V)
R
ON
OFF
1, 2 (see connection diagram)
Counts each positive edge of the input signal
12.5 kHz
30 to 70 % (high-pulse ≥ 30 μs, low-pulse ≥ 30 μs)
0.5 % of measured value; ambient temperature influence: 50 ppm/K
DC 0/24 V +10/-15 %; galvanically isolated
Max. 40 mA per output, max. 100 mA in total (including auxiliary voltage supply
current)
DC 24 V +10/-15 %
Max. 100 mA (including digital outputs current)
1 (see connection diagram)
3 A at AC 230 V or DC 30 V, resistive load
30,000 switching operations at rated load
11 Annex
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