Safety Outputs; Overview; Output Channel Mode Setting; Dual Channel Mode Setting - Omron NE1A-SCPU01 - 07-2009 Operation Manual

Safety Outputs

7-4 Safety Outputs
7-4-1

Overview

7-4-2

Output Channel Mode Setting

IMPORTANT If a safety pulse output is set, an OFF pulse signal (pulse width: 580 µs) will
7-4-3

Dual Channel Mode Setting

NE1A-series Controllers are equipped with eight safety output terminals.
By selecting the setup and wiring based on the types of external devices to be
connected or the safety level to be achieved, the NE1A-series Controller can
flexibly handle various applications.
The following output signal line errors can be detected for the NE1A-series
Controllers.
• Contact with the power supply line (positive side, only when the output is
OFF)
• Ground faults
If the diagnostic pulse output is enabled, the following errors can be detected.
• Contact with the power supply line (positive side, when the output is ON
or OFF)
• Ground faults
• Short circuits between output lines
Set the output channel mode based on the type of external device to be con-
nected.
Channel mode
Not used Output not connect to an output device.
Safety A test pulse is not output when the output is ON.
Short circuits with the power supply line (when the output is OFF) and
ground faults can be detected.
Safety pulse A test pulse is output when the output is ON.
output
This enables detecting short circuits with the power supply line (positive
side) (when the output is ON or OFF), ground faults, and short circuits
between output signals.
be output to diagnose the output circuit when the safety output turns ON.
Check the input response time of the control device connected to the NE1A-
series Controller to be sure that this output pulse will not cause malfunctions.
The NE1A-series Controller's Local safety output terminals can be set to Dual
Channel Mode. Setting Dual Channel Mode enables the following.
• An error will be detected if the two outputs from a user program are not
equivalent.
• If an error is detected in one of the two output circuits, both outputs to the
external device will become inactive.
Channel mode
Single Channel
Dual Channel
Description
Description
Used as an independent safety output.
Used as a Dual Channel Output with the paired safety output ter-
minal. The output can be turned on when both the output and the
paired safety output are normal.
Section 7-4
129