Omron NX-SID800 User Manual

3 Part Names and Functions
3 - 26
NX-series Safety Control Unit User’s Manual (Z930)
The types of safety input functions that are performed by the Safety Input Unit is shown below.
For the safety input functions, the safety signals that are input to the safety input terminals are evalu-
ated and safety input data that can be used in the safety program is created. The configuration of the
safety input functions is shown in the following figure.
The values that are read from the safety input terminals are passed to the safety program only after
they are evaluated by the safety input functions.
The following pages describe the details of the individual safety input functions.
Types of Safety Input Functions
Safety Input Unit
Safety input terminals
Safety CPU Unit
Safety Output Unit
Safety input
function
Safety program
execution
Safety
output function
Safety input data
Safety output data
Safety
I/O communications
Safety I/O
communications
Safety output terminals
Self-diagnosis
Test pulse evaluation
A pulse is output at a specific
interval to detect failures or
wiring errors in the externally
connected device. The test
pulse that is used depends
on the safety device.
Without test pulse
Mechanical contacts
Single-beam safety sensors
Non-contact door switches
Safety mats/safety edges
Dual channel evaluation
When safety terminal inputs
are used as dual channels,
the two inputs are checked
for consistency.
Single channel
There is no redundancy.
Dual-channel equivalent inputs
Two inputs are checked to make sure they
have the same value.
Dual-channel complementary inputs
Two inputs are checked to make sure they have different values.
Safety mats/safety edges
A two-input logic check is made for a safety mat.
Other Functions
Input filters
ON delays and OFF delays can be set to prevent malfunctions caused by
noise or by chattering of externally connected devices.
ON delay
OFF delay
Test output terminal short detection
This function detects ground faults in the external wiring connected to test
output terminals.
I/O power supply monitoring
This function monitors the voltage range of the I/O power supply to
ensure the operation of the internal circuits.

Omron NX-SID800 Specifications

General

Brand	Omron
Model	NX-SID800
Category	Controller
Language	English