Setting Error detection
Single/Dual Test pulse
Contact
with posi-
tive side of
power line
Ground fault
*1
Disconnection
Short
circuits
in input
wiring
Dual Channel
Equivalent
Without Test Pulse Not detecta-
ble.
*2
Not detectable. Detectable
when input
turns ON.
Not de-
tecta-
ble.
*2
Same test source for pair
of safety input terminals
Detectable. Detectable
when input
turns ON.
Detectable
when input
turns ON.
Not de-
tectable.
Different test sources for
pair of safety input termi-
nals
Detectable. Detectable
when input
turns ON.
Detectable
when input
turns ON.
Detecta-
ble.
Dual Channel
Complementary
Without Test Pulse Detectable
when input
turns ON or
OFF
.
Detectable
when input
turns ON or
OFF.
Detectable
when input
turns ON or
OFF.
Detecta-
ble.
Same test source for pair
of safety input terminals
Detectable.
Detectable
when input
turns ON or
OFF.
Detectable
when input
turns ON or
OFF.
Detecta-
ble.
Dif
ferent test sources for
pair of safety input termi-
nals
Detectable. Detectable
when input
turns ON or
OFF.
Detectable
when input
turns ON or
OFF.
Detecta-
ble.
*1. To detect ground faults, the 0-V line of the external power supply must be grounded.
*2. Detection is possible with the OSSD diagnostic function of the light curtain or laser scanner.
l
Single-beam Safety Sensors, Non-contact Door Switches, Safety Mats,
and Safety Edges
Input device
Error detection
Contact with
positive side
of power line
Ground fault
*1
Disconnec-
tion
Short cir-
cuits in in-
put wiring
Failure of in-
put device
Sensor by-
pass
Single-beam
Safety Sensor
Detectable. Not detectable. Not detecta-
ble.
--- Not detecta-
ble.
Detectable.
D40A Non-con-
tact Switch
Detectable. Not detectable. Not detecta-
ble.
--- Not detecta-
ble.
Not detect-
able.
D40Z Non-con-
tact Switch
Detectable. Not detectable. Not detecta-
ble.
--- Detectable. Detectable.
Safety Mat/Safe-
ty Edge
Detectable. Detectable. Detectable. Not detecta-
ble.
Not detecta-
ble.
---
*1. To detect ground faults, the 0-V line of the external power supply must be grounded.
Additional Information
To detect burnouts in a muting lamp, use a PIT si1.2 Muting Lamp manufactured by Pilz, which
supports defective lamp detection.
4 Safety Control Unit Operation
4 - 29
NX-series Safety Control Unit User's Manual (Z930)
4-3 Safety I/O Function
4
4-3-1 Safety Input Function
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