Safe2+ / Safe4
Operation Manual
14 www.cedes.com
©
CEDES
Safety & Automation AG / June 2008
Increased output loads may be realized using exter-
nal safety interfaces.
Important information:
Safety devices for connection of Safe2+ or Safe4
the must be built with PNP logic. The outputs will be
periodically controlled for short-circuit and cross-
fault detection.
The output voltage at the solid-state outputs is de-
pendant on the power supply and the output load
(see chapter 11 Technical Data).
5.3.8. Trouble shooting
Possible errors and operation status are indicated
with the LED indicators on the emitter and receiver.
Also the OptiLink has an option that can be used for
the diagnostics (chapter 5.3.9).
Following combinations are relevant:
Table 1: Emitter
LED
Status
Orange
(Power)
Green
(ok)
Red
(Test)
No power supply (external)
off
off
on
Test input closed (external)
on
on
off
Test input open (external)
on
off
on
Controller error (internal)
flashing
off
on
Protective field error (internal) flashing
off flashing
Table 2: Receiver
LED
Status
Orange
(Power)
Green
(Protective
field not
interrupted)
Red
(Protective
field
interrupted)
No power supply
(external)
off off off
No sufficient power
(external)
on off off
OSSD on (on-load operation,
protective field not inter-
rupted, normal)
on on off
OSSD off (off-load operation,
protective field interrupted or
insufficient alignment of the
system)
flashing off
on
OSSD error (external, short
circuit between OSSD 1 and
OSSD 2, towards 0 V and 24
VDC)
all 3s
short time
off
off flashing
Controller error (internal)
irregular
flashing
off on
Protective field error (internal)
flashing
off
flashing
External error:
An external interface error can be
resolved by correcting the installation, due to
1. Receiver: short circuit of both OSSDs, of OSSD
to U
sp
, of OSSD to GND
2. Emitter: Test input open
3. No or too low power supply
4. Wrong configuration in case of cascading sys-
tems
5. Inadequate adjustment of emitter and receiver
Internal error
(orange LED is irregularly flashing):
Please contact the nearest CEDES representative.
Normal operation
Emitter
Receiver
Operation status
Test input closed
OSSD on
Protective field free
Test input closed
OSSD off
Protective field interrupted
Test input open
OSSD off
Test active
5.3.9. OptiLink
As an accessory offers CEDES an infrared adapter
(OptiLink) including a software package for ex-
tended diagnostic purposes.
Figure 20: OptiLink
The adapter may be snapped on the controller dur-
ing normal operation and may be connected via the
interface to a MS-Windows personal computer for
diagnoses purposes. A detailed description about
extended diagnostic features is shipped with the
diagnostic package.
The OptiLink offers apart from the diagnosis of op-
erating conditions, the possibility to select and ana-
lyse the length of the interrupted protective field.
6. Interfacing to safety de-
vices
The interfacing of the light curtain with the machine
control has to be control reliability, i.e. a correct in-
terface with a safety PLC or safety relays with posi-
tive guided relay contacts.
Figure 21 - Diagram for automatic reset mode -
shows a diagram of a typical emergency stop relay
component.
Other applications are mentioned in the application
note "Safety Interfaces with Safe2+ / Safe4", on the
CEDES homepage or from safety relay manufactur-
ers.