Banner SC22-3E Safety Controller with Ethernet - Manual (Page 41)

+24V dc
MPCE 1
SO 1
MPCE1
Safety Input
Device
EDM
Safety Controller
MPCE 2
MPCE2
Single-channel EDM used to monitor both
MPCE feedback signals. If one or both chan-
nels do not close, the system goes into a Lock-
out condition.
Figure 22. One-channel EDM hookup
Dual-channel EDM is used to monitor
both MPCE feedback signals. If the
channels are not in the same state,
the system goes into a Lockout condi -
tion.
+24V dc
MPCE 1
SO 1
MPCE1
Safety Input
Device
EDM EDM
Safety Controller
MPCE 2
MPCE2
Figure 23. Two-channel EDM hookup
Safety Output
250 ms
Max.
250 ms
Max.
250 ms
Max.
Don’t Care Don’t Care
ON
OFF
Closed
Open
EDM
Figure 24. Timing logic: One-channel EDM status, with respect to Safety Output
Safety Output
250 ms
Max.
250 ms
Max.
250 ms
Max.
250 ms
Max.
250 ms
Max.
250 ms
Max.
Don’t Care
Closed
Open
Closed
Open
EDM 1
EDM 2
Figure 25. Timing logic: Two-channel EDM, timing between channels
For two-channel EDM, as shown below, both channels must be closed before the Safety Output(s) turn ON.
Safety Output
Must Match EDM 2 Must Match EDM 2
ON
OFF
Closed
Open
EDM 1
Must Match EDM 1 Must Match EDM 1
Closed
Open
EDM 2
Figure 26. Timing logic: Two-channel EDM status, with respect to Safety Output
4.7.2 Safety Outputs
The Safety Controller has three pairs of solid-state Safety Outputs (SO1 a and b, SO2 a and b, and SO3 a and b). Each pair consists of
two output signal switching devices (OSSDs). The solid-state Safety Outputs are actively monitored to detect short circuits to the supply
voltage, to each other, and to other sources of electrical energy. If a failure is detected, the outputs will switch to an Off state. For circuits
requiring the highest level of safety and reliability, either OSSD must be capable of stopping the motion of the guarded machine control-
led by a Safety Output, in an emergency.
SC22-3/-3E Safety Controller Instruction Manual
P/N 133487 rev. C www.bannerengineering.com - tel: 763-544-3164 41