Honeywell SYA14 Series, Manual

Page: 652 / 737

FF-SRD5985 Series
ISSUE 1
PK 107013-01
6
PK 107013-01-EN FR26 GLO 398 Printed in Germany
APPLICATION EXAMPLES
TWO-CHANNEL SAFETY DOOR MONITORING (WITHOUT EXTERNAL CONTACTORS)
FF-SRD5985
Sa
Sb
FSRD7
FUNCTIONAL DESCRIPTION:
After opening the door, the two external safety switch contacts Sa and Sb will open (as illustrated above) and the two
internal safety relays K1 and K2 will de-energize. The normally open safety outputs 13/14 and 23/24 will open relaying
the stop condition to the machine control circuitry. After closing the door and if Sa and Sb close in less than three
seconds, the safety relays K1 and K2 will energize. The two normally open safety contacts will close and a manual
restart sequence of the control system may then be initiated (allowing the machine to operate). The Final Switching
Device monitoring loop (FSD) has to be closed (Y1-Y2, jumpered).
TWO-CHANNEL SAFETY DOOR MONITORING (WITH EXTERNAL CONTACTORS)
FF-SRD5985
Machine control
circuitry
FSRD8
K3
K3
K3 K4
K4
K4
FUNCTIONAL DESCRIPTION:
For high current, the output contacts should be reinforced by using external safety relays.
The proper operation of the external contactors is monitored by connecting the NC contacts into the Final Switching
Device monitoring loop (terminals Y1-Y2).
After opening the door, the two external safety switch contacts connected to S13/S14 and S23/S24 will open and the
two internal safety relays K1 and K2 will de-energize. The normally open safety outputs 13/14 and 23/24 will open and
de-energize the external contactors K3 and K4. After closing the door if the two inputs (S13/S14 and S23/S24) close in
less than three seconds and if the two contactors K3 and K4 are working properly, the internal safety relays K1 and K2
will energize. The two normally open safety contacts will close and energize the external contactors K3 and K4. A
manual restart sequence of the control system may then be initiated (allowing the machine to operate).