ABB PLUTO Safety-PLC - Safety Devices with Transistor Outputs; Safety Mats and Safety Edges

32 2TLC172001M0211_A
6.5 Safety devices with transistor outputs
Certain safety devices on the market, i.e. light curtains, light beams, scanners etc., are
designed with dual monitored safety 24V DC transistor outputs. These devices monitor the
output circuits by making short interruptions in the output signals.
Both channels can be connected to the system as static inputs. Faults are detected by the
safety device instead of by the Pluto system. But note that at least one of the inputs must
be of IO-type I_.
The short interruptions of the output signals are taken care of by the Pluto input filtering
system.
6.6 Safety mats and safety edges
Safety mats and safety edges must be supplied by two different dynamic signals and be
connected to two inputs. By activation the two inputs will both get wrong input signal and give
“0” in the software as result. The programming can be made in the same way as for other dual
channel functions.
I0.0 I0.1
O
S
S
D
1
O
S
S
D
2
I0.2 IQ0.10
O
S
S
D
1
O
S
S
D
2
I0.0, static
I0.1, static
I0.2, static
I0.10, static
IQ0.13
IQ0.12
O
S
S
D
1
O
S
S
D
2
Declaration in software (Pluto no:0) :
NOTE: Only one of the inputs may be of the IO-type IQ_.
Connection of safety mats.
The diodes shall be placed before the mat (as shown).