Honeywell SYA14 Series Manual page 687

APPLICATION EXAMPLES
FIG 12. DUAL CHANNEL EMERGENCY STOP CIRCUITRY WITH MANUAL OR AUTOMATIC START,
CROSS-FAULT MONITORING AND EXTERNAL CONTACTORS.
Fuse
L1 (+)
(B)
S1
S2
Internal switch
position for manual
start operation
mode
N (-)
(A) This may be an emergency stop push button in series with dual output safety switching devices (OSSD) such as
safety light curtains (FF-SB, FF-LS), safety mat (FF-SM), single beam (FF-SPS), modular safety light curtains (FF-
SC), safety laser scanner
(B) Manual start mode: Insert start push-button and select internal switch S2 as illustrated above
Automatic start mode: Insert shunt and select internal switch S2 to automatic start mode
This circuit has redundancy in the emergency-stop control circuit and therefore offers the highest possible
safety level.
Manual start mode
1. After removing the stop condition, press and release the START push button to restart the safety control module.
2. The K2 and K3 LED's will turn ON indicating that the safety relays K2 and K3 are energized. The three normally
open safety contacts will close and the normally closed safety contact will open allowing the machine to operate.
Automatic start mode
1. After removing the stop condition, the safety control module will immediately reset.
2. The K2 and K3 LED's will turn ON indicating that the safety relays K2 and K3 are energized. The three normally
open safety contacts will close and the normally closed safety contact will open allowing the machine to operate.
External contactors:
With switching current >10 A, the output contacts should be reinforced by external contactors (K4 and K5) with
positive-guided contacts. The proper operation of the external contactors is monitored by looping the NC contacts into
the restart circuit (terminals S33-S34).
1. After activation of the E-stop push button, the two K2 and K3 LED's will turn OFF, indicating that the two internal
safety relays K2 and K3 are de-energized. The normally open safety outputs 13/14, 23/24 and 33/34 will open and
de-energize the external contactors K4 and K5. The normally closed safety output will also close.
2. After removing the stop condition, press and release the START
module.If the two contactors K4 and K5 are working properly, the K2 and K3 LED's will turn ON indicating that the
safety relays K2 and K3 are energized. The three normally open safety contacts will close and the normally closed
safety contacts will open allowing the machine to operate.
107017-11 EN FR26 GLO 0999 Printed in Germany
Off
(A)
A1 S
(+) 11
Power
K2
K3
A2 S
(-) 33
K4
(B)
Start
(FF-SE), dual output safety limit or interlock switches (for example: CLS and GK).
S S
12 22 13 23 33
Honeywell
FF-SRS5935
S1
S2
Internal
Switches
S S21
34 PE 14 24 34
K5
K4 K5
push button to restart the safety control
41
L1 L2 L3
K4
K5
42
Machine Control
Machine
Control
Fuses
7