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21
D40A/G9SX-NS
When indicators other than the ERR indicator flash, check and take necessary actions referring to the following ta
b
le.
(Expansion Unit)
ERR
indicator
Other
indicator
Fault
Expected causes of the fault
Check points and measures to take
Li
g
hts
AND
flashes
Fault involved with logical
AND connection input
1. Error in the wiring of the logical AND
connection input
2. Incorrect setting for the logical AND
connection input
3
. Failure of the circuit of the logical
AND connection input
1. Check the wiring to T41 and T42.
Note: 1.
Make sure that the wiring length for the
T41, T42 terminal is 100 meters or less.
2.
Make sure that the logical AND
connection signal is
b
ranched for 4 units
or fewer.
2. Confirm the set value of the logical AND
connection preset switch.
3
. Replace with a new product.
All
indicators
except
PWR flash
Supply voltage outside the
rated value
1. Supply voltage outside the rated
value
1. Check the supply voltage to the Units.
ERR
indicator
Other
indicators
Fault
Expected cause of the fault
Check points and measures to take
Off
T1
flash
Mismatch
b
etween input 1
and input 2.
The input status
b
etween input 1 and
input 2 is different, due to contact failure
or a short circuit of safety input
device(s) or a wiring fault.
Check the wiring from safety input devices to the
G9SX. Or check the input sequence of safety input
devices. After removing the fault, turn
b
oth safety
inputs 1 and 2 to the OFF state.
T2
ERR
indicator
Other
indicators
Fault
Expected cause of the fault
Check points and measures to take
Li
g
hts
---
Fault involved with safety
relay outputs of
Expansion Units
1. Welding of relay contacts
2. Failure of the internal circuit
Replace with a new product.