
Functions
Leuze electronic
MSI-TRMB
15
4.4
Operating mode SG
Safety sequential device for 2-channel safety door monitoring.
SG
= mechanical safety door switch (2-channel)
Figure 4.4: Basic wiring for operating mode SG (safety door)
4.5
Testing with operating mode 1 AOPD and 2 AOPDs
The protective sensors (AOPDs) are monitored for
• Short-circuit with operating voltage (Vcc or GND)
• Electrical cross-circuit
• Optical cross-circuit or short-circuit
For this purpose, control outputs S11 and (after a delay) S21 are clocked.
4.6
Testing with operating mode ES and SG
The E-Stop and safety door switch is monitored for
• Short-circuit with operating voltage (Vcc or GND)
• Electrical cross-circuit
For this purpose, control outputs S11 and (after a delay) S21 are clocked as shown in the diagram below:
a
Test signal of MSI-TRMB at S11 and S21
Figure 4.5: Diagram showing clocking of control outputs S11 and S21
4.7
Start/restart interlock and contactor monitoring (EDM)
The start/restart interlock prevents automatic start-up of the system (e.g. if the protective field is again clear
or if an interruption in the voltage supply is restored). The operating personnel must make certain that no
people are present in the danger zone before the system is manually re-enabled.
The restart interlock is configured via the wiring.
The safety door monitoring switches must be closed so that the safety switching outputs (OSSD)
can close.
SG
S11
S12
S21
S22
S32
SG
The total delay time for a linked series of photoelectric sensors must be in the range from 0.5 ms
to 6.5 ms.
a
1 ms
200 ms