SIGMATEK SDM 081, Operating Manual

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SDM 081 S-DIAS SAFETY DIGITAL MIXED MODULE
Page 14 07.02.2022
3 Technical Data
3.1 Input Specifications
The inputs are Type 1 in accordance with EN 61131-2
Number 6
Input voltage +24 V DC
Input voltage range m18 V m30 V
(1)
Signal level
low: ≤ +5 V high: ≥ +15 V
Switching threshold typ11 V
Input current 3 mA at +24 V
Input delay 0.5 ms
(1)
With increased ambient temperature >55 °C the maximum permissible supply voltage is
reduced from 30 V to 28.8 V.
3.2 Specifications for Cross-Circuit Detection Signal Outputs
Number 3x signal A 3x signal B
Rated output voltage +24 V DC
Output voltage range m18 V m30 V
(2)
Output current 100 mA at +24 V
Miscellaneous short-circuit proof
(2)
With increased ambient temperature >55 °C the maximum permissible supply voltage is
reduced from 30 V to 28.8 V.
The clock outputs A and B are generated once internally and are wired in parallel to
the connectors. A direct cross-circuit of Clock A and/or B of a connector therefore
results in cross-circuit detection in all channels.
When using the digital inputs with the clock outputs for cross-fault detection for long
cable lengths, make sure that the cable capacitance from the clock output to the
digital input does not exceed a value of 100 nF and that the cable resistance does not
exceed a value of 250 Ω, so that the cross-fault detection does not detect a wiring
error with proper wiring.