CR720S CR721S
33
ifm electronic gmbh ● Friedrichstraße 1 ● 45128 Essen We reserve the right to make technical alterations without prior notice!
26/11/2020
CR721S / page 3
CR721S (HW version: V1.0.5.x)
Technical data
Control systems
Operating states system
LED SYS0
LED SYS1
System state
Colour
State
Colour
State
–
off
–
off
no operating voltage
green
5 Hz
–
off
no operating system loaded
red
on
–
off
hardware error (fatal error+)
red
on
red
on
system error (fatal error)
green/
yellow
2 Hz
green/
yellow
2 Hz
Update
Operating states PLC / application
LED
Co-
lour
State
Description
SYS0 green on
standard PLC
no application
2 Hz
run
red
10 Hz
error application (serious error)
yellow
2 Hz
debug run
on
debug stop
blue
on
sleep mode
SYS1 green on
safe PLC
no application
2 Hz
run
red
10 Hz
error application (serious error)
yellow
2 Hz
debug run
on
debug stop
ETH0 green
flashing
data transmission Ethernet
on
Ethernet connection OK, no data transfer
ETH1 green
flashing
data transmission Ethernet
on
Ethernet connection OK, no data transfer
APP0
...
APP3
red
on
status display of the application, freely program-
mable
green on
status display of the application, freely program-
mable
blue
on
status display of the application, freely program-
mable
Safety-related characteristics
Safety Integrity Level Claim Limit
SIL CL
2
Component
PFH
D
[1/h]
Input, external, single channel
<4.0 x 10
-9
Input, external, dual channel
<5.0 x 10
-10
Logic
<1.0 x 10
-7
Output, external, single channel
<2.0 x 10
-8
Output, external, dual channel
<1.0 x 10
-9
Mission
time: 20 years
Other characteristic values: see SISTEMA library at ifm.com for download
GB
