107017-11 EN FR26 GLO 0999 Printed in Germany
8
IMPROPER EXTERNAL SAFETY RELAYS PERFORMANCE
•
Use two independent stop circuit safety relays with mechanically linked contacts to reliably detect a welded
contact.
APPLICATION EXAMPLES (continued)
FIG 13. SINGLE CHANNEL EMERGENCY STOP CIRCUITRY WITH MANUAL START.
FSRS11
A2
(-)
A1
(+)
S
11
S
12
S
22
S21
PE
S
33
S
34
13
23
33
41
Honeywell
FF-
SRS5935
14
24
34
42
Power
K2
K3
S1
S2
(A)
Fuse
Machine
Control
L1 (+)
N (-)
S1
S2
Internal switch
position for
manual start
operation mode
Start
Off
(B)
(B)
Power
(A) This may be an emergency stop push button with a single output safety device in series such as
- safety limit or interlock switches (for example: CLS, GK and GSS).
(B) Automatic start mode: Insert a shunt and select internal switch S2 to automatic start mode
This circuit has NO redundancy in the emergency-stop control circuit and therefore offers a minor
safety level.
•
If using a single safety input, position the S1 switch to the “no cross-fault monitoring” mode to remove the
cross fault monitoring feature.
•
If a safety control module is used in an automatic start mode, position the S2 switch to the “automatic start”
mode. In addition, the start push button must be replaced by a jumper (between terminals S33/S34). If
external safety relay monitoring is necessary, connect one contact of each relay required to be monitored,
in series between S33/S34.
IMPROPER AUTOMATIC START MODE
•
If the module is in the automatic operation mode, another part of the safety control circuitry must keep the
latched function engaged.
Failure to comply with these instructions could result in death or serious injury.
Summary of Contents for SYA14 Series
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