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ETV 1591-H
CONTROL PANEL
Page 38
24.03.2015
6
Digital In and Outputs
The IPC has 4 digital short-circuit proof outputs of +24 V / 2 A each (positive switching) as
well as 4 digital 24 V / 5 mA / 5 ms inputs to detect the signal conditions 0 and 1.
In compliance with the safety-relevant requirements of the BG Institute for Occupational
Safety (BIA), the outputs on the primary (+5 V) and the secondary (+24 V) sides are isolat-
ed using optic couplers (according to application class 3, pollution degree 2).
For the inputs, the primary (+24 V) and the secondary sides (+5 V) are separated using
optic couplers. In the monitoring circuits of the voltage supply for each channel group, the
primary (+5) and secondary (+24) sides are also isolated with optic couplers.
GND and EXTGND are not galvanically isolated (for safety reasons, not required). The
clearance between conductor paths complies with UL regulations.