Pilz PSS67 F 16DI SB-T - Manual (Page 33)

Operating Manual: PSS67 F 16DI SB-T 7 - 7
Example: Dual-channel input devices, without test pulses
Features:
• This type of connection is mainly used for signal inputs with frequent
operation.
• Depending on the application area and its respective regulations, this
connection diagram is suitable for input devices with frequent operation
and diverse channels, up to Category 4 in accordance with EN 954-1,
provided the functionality of both input device channels is monitored in
the user program via a feasibility check.
• Depending on the application area and its respective regulations, this
connection diagram is suitable for input devices with infrequent
operation up to Category 3 in accordance with EN 954-1, provided the
functionality of both input device channels is monitored in the user
program via a feasibility check.
• If you are using input devices with different (diverse) channels, adjacent
inputs may be used. Short circuits will be detected in the user program
via the feasibility check (see example in the PSS-Range Programming
Manual).
CAUTION!
A short circuit in the cable between the input device and input with the
24 VDC line or between adjacent input devices will not be detected.
Depending on the type of input device connected, this could create a risk to
both personnel and machinery (e.g. E-STOP). Always ensure that the unit
is suitably wired to eliminate the risk of short circuits.