Banner GM-FA-10J Original Instructions Manual page 8

One-Channel Monitoring
Configured for one-channel monitoring of multiple guards with sin-
gle switches at each guard (see Warning). Up to 10 Banner mag-
netic switches may be connected to each channel in this series/
parallel method.
WARNING:
Not a Safety Category 4 Appli-
cation.
When monitoring multiple guards
with a series connection of multi-
ple safety interlock switches, a
single failure may be masked or
not detected at all.
When such a configuration is
used, procedures must be per-
formed regularly to verify proper
operation of each switch. See
"Monitoring Series- Connected
Safety Switches" for more infor-
mation.
(If other than Banner magnetic switches are used, a total resist-
ance of 270 Ohms between S11/S13, S11/S12, S21/S22 and
S21/S23 must not be exceeded.)
Two-Channel Monitoring
Configured for two-channel monitoring of multiple guards with two
safety switches mounted individually on each guard (see Warning).
The number of mechanical switches is limited by the max. resist-
ance of 270 ohm between S11/S13, S11/S12, S21/S22 and S21/
S23. The total resistance is calculated by adding the resistance of
all guard switch contacts and the resistance of the cables that con-
nect the switches and the switches to the module.
WARNING:
Not a Safety Category 4 Application.
When monitoring multiple guards with a series connection of multiple safety interlock switches, a single
failure may be masked or not detected at all.
When such a configuration is used, procedures must be performed regularly to verify proper operation of
each switch. See "Monitoring Series- Connected Safety Switches" for more information.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Guard #1
SI-MAG..MM
SI-MAG..SM
Mechanical
stop
S12 S11 S13
NOTE: Switch/magnet pairs
shown in closed position.
S23 S21 S22
Mechanical
stop
SI-MAG..SM
SI-MAG..MM
Guard #3
Figure 5. Alternate wiring for one-channel monitoring of multi-
ple guards
Guard #1 Guard #2 Guard #3
S12 S11 S13
NOTE: Guards shown in closed position.
S22
S23 S21
Figure 6. Alternate wiring for two-channel monitoring of multi-
ple guards
GM-FA-10J Gate Monitoring Safety Module
Guard #2 Guard #n
SI-MAG..MM SI-MAG..MM
SI-MAG..SM SI-MAG..SM
SI-MAG..SM SI-MAG..SM
SI-MAG..MM SI-MAG..MM
Guard #4 Guard #n+1
Guard #4 Guard #n