Omron NE1A-SCPU01 - 07-2009 - Wiring I;O Devices

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Wiring Section 3-2
3-2-3 Wiring I/O Devices
Wiring Input Devices
Refer to the following information for input device selection and wiring.
■ Devices with Mechanical Contact Outputs
Examples: Emergency stop buttons and safety limit switches
These devices use both a safety input terminal and test output terminal. A
safety input terminal inputs the test output signal (pulse output) of the NE1A-
series Controller via a contact output device.
■ Devices with PNP Semiconductor Outputs (Current Sourcing)
Example: Light curtains
A PNP semiconductor output signal from this type of device is input to the
NE1A-series Controller’s safety input terminal.
INx
G1
Tx
V1
24 VDC
Minimum applicable load:
4 mA, 24 VAC
NE1A-series
Controller
4.5 mA typical
24 VDC
OSSDx
GND
INx
G1
Tx
V1
24 VDC
4.5 mA typical
NE1A-series
Controller
!WARNING
Serious injury may possibly occur due to loss of required safety functions. Use appropri-
ate components or devices according to the requirements given in the following table.