APPLICATION EXAMPLES
FIGURE 9.
CONNECTION OF AN FF-SRS59352 EMERGENCY STOP MODULE
A2(-)
A1(+) S11 S12 S22
S21
PE
S33
S34
13
23
33
41
Honeywell
FF-SRS59352
14
24
34
42
Power
K2
K3
S1
S2
Internal
switches
Fuse
24 Vdc
A1(+) A3(+)
13
23
A2(-)
A4(-) 14
33
43 51
52
24
34 44
Y1
Y2
Honeywell
K1
K2
Machine control
Restart push-
button
1 NO and 1 NC
safety contacts
4 NO
and 1 NC
safety
contacts
Emergency stop
push-button (A)
(A)
0 Vdc
FF-SRE60292
FUNCTIONAL DESCRIPTION:
After activation of the safety device (see application note (A)), the normally open safety contacts of the FF-SRS59352
dual channel emergency stop module (13/14 to 33/34) and the connected FF-SRE6029 extension module (13/14, 23/24,
33/34, 43/44) will open. The normally closed contacts (41/42, 51/52) will all close. The LED relay output indicators (K2,
K3 and K1, K2) of both modules go off indicating that the internal safety relays are de-energized.
After removing the emergency stop condition, press and release the restart push-button to restart the FF-SRS59352
emergency stop module. If the FF-SRE6029 extension module is operating properly, the normally closed contact
(Y1/Y2) for the External Device Monitoring is closed and both safety modules are energising their internal safety relays.
The normally open contacts will close and the normally closed contacts will open. The LED relay output indicators all
illuminate. This action will allow the machine to operate.
FSR
E
6029_12
APPLICATION NOTES
Note (A): Dual channel output safety devices with relay outputs or safety switches (examples)
This may be a safety device with dual output safety switching devices (OSSD)
•
emergency stop push-button
•
safety limit or interlock switches (e.g. CPS, GK, GSS)
IMPROPER INPUT CONNECTIONS
•
To ensure the highest level of safety, always connect the two redundant safety device outputs individually to the
safety relay inputs A1(+)/A2(-) and A3(+)/A4(-) of the FF-SRE6029 Extension Module.
•
When safety devices with relay outputs are used, always connect them using different potentials to A1(+)/A2(-) and
A3(+)/A4(-), in order to be able to detect cross-faults.
IMPROPER EXTENSION MODULE MONITORING
•
The External Device Monitoring (EDM) function checks the correct operation of the internal relays before each
FF-SRE6029 activation and is able to detect failures of the internal relays (e.g. welded safety relay contacts).
•
ALWAYS connect the normally closed contact (Y1/Y2) of the extension module to the External Device Monitoring
(EDM) loop of the connected safety device. NEVER use the normally closed contact (51/52) for the EDM monitoring.
Failure to comply with these instructions could result in death or serious injury.
6
107137-20 -EN FR26 GLO 305 Printed in Germany