Pilz PSS Series Operating Manual page 24

Fig. 5-3: Example: Dual-channel input devices, without test pulses
Please ensure safety regulations and EMC guidelines are met!
Operating Manual: PSS(1) DI2O Z
Dual-channel input
device with pulsed
semiconductor outputs
Input for other input
devices
Dual-channel input
device with identical
(homogenous) channels
(max. Category 3)
Dual-channel input
device with different
(diverse) channels
5-7