Pilz PSS SB HYD, Basic license - Manual (Page 228)

6-166 Modular Block System: Hydraulic Presses
Standard Function Blocks SB097
Wiring the output parameters
Positive or negative-switching outputs can be used to drive the muting
lamps.
If positive-switching outputs are used, muting lamps must be switched with
the aid of optocouplers (e.g. PHOENIX power couplers, type ST-0V-2, Art.
No. 29 05 49 1, 24 VDC/24 VDC 5 A).
With negative-switching outputs (e.g. output xx.06 and xx.07 on the
SafetyBUS p module PSS SB DI8O8), the muting lamps can be switched
directly.
See example: “Monitoring muting lamps” in Chapter 8.
Wiring diagram
Function
The block uses feedback inputs (input parameters FbL1 / FbL2) to monitor
the filaments on two muting lamps (output parameters LMP1 / LMP2).
Monitoring occurs in both the off state (input parameter ON = 0) and the
on state (input parameter ON = 1). In the off state, 1-Potential must be
present at the feedback input. In the on state, the output through which the
muting lamp is driven will be switched off and checked. This happens
every 12 seconds; the time is not adjustable. If the filament is in order,
1-potential is present at the feedback input. If the filament has blown, 0-
potential will be present.
24 V DC
Positive-
switching
output
LMP1
Input
FbL1
Input
FbL2
Positive-
switching
output
LMP2
0 V DC
Fig. 6-9: Wiring diagram