Rockwell Tools GUARDSHIELD SAFE 4 - Manual (Page 15)

Operation Manual GuardShield Safe 4
15
Important information:
Safety devices for connection of GuardShield Safe 4 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
dependant on the power supply and the output load
(see chapter 11 Technical Data).
5.3.6. Trouble shooting
Possible errors and operation status are indicated with
the LED indicators on the transmitter and receiver.
Following combinations are relevant:
Table 1: Transmitter
Status LED
Orange Green Red
(Power) (ok) (Test)
No power supply off off on
(external)
Test input closed
on on off
(external)
Test input open
on off on
(external)
Controller error
flashing off on
(internal)
Protective field error flashing
off flashing
(internal)
Table 2: Receiver
Status LED
Orange Green Red
(Power) (Protective (Protective
field not field
interrupted) interrupted)
No power supply off off off
(external)
No sufficient power
on off off
(external)
OSSD on (on-load operation,
on on off
protective field not interrupted,
normal)
OSSD off (off-load operation,
flashing off on
protective field interrupted or
insufficient alignment of the
system)
OSSD error (external, short
all 3s
circuit between OSSD 1 and short time off flashing
OSSD 2, towards 0 V and off
24 VDC)
Controller error (internal) irregular off on
flashing
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. Transmitter: Test input open
3. None or too low power supply
4. Inadequate adjustment of transmitter and
receiver
Internal error (orange LED is irregularly flashing):
Please
contact the nearest ROCKWELL
AUTOMATION representative.
Normal operation
Transmitter 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
6. Interfacing to safety devices
The interfacing of the light curtain with the machine
control has to be control reliability, i.e. a correct
interface with a safety PLC or safety relays with
positive guided relay contacts.
Figure 17 - 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 GuardShield Safe 4”, on
the ROCKWELL AUTOMATION homepage.
ATTENTION
The safety devices and the interconnection to
the machinery have to comply with the basic
safety requirements as mentioned in the current
regulations and standards.
Direct interfacing of a safety light curtain to
machine control that does not meet the necessary
safety integrity level, i.e. use of general purpose
PLCs or general purpose relays can cause serious
injury or death of persons.
If necessary, consult a professional safety
engineer!