OMRON NE1A Series Secure Network Controller Operation Manual

Product positioning and safety certification

This document is the operation manual for the NE1A series secure network controller, used for mechanical functional safety distributed control systems.

Coverage model:

No EtherNet/IP: NE1A SCPU01 (- V1), NE1A SCPU02

Equipped with EtherNet/IP: NE1A SCPU01 EIP, NE1A SCPU02 EIP

Core Security Certification:

IEC 61508 SIL3

EN ISO 13849-1 PLe/Safety Category 4

EN 62061、UL 508、Class I Div 2

Hardware specifications and interfaces

1. Comparison of I/O models

Model safety input test output safety output

NE1A – SCPU01 (- V1)/- EIP 16:04:08

NE1A – SCPU02/- EIP 4:08:08

2. Electrical specifications

Power supply: 24VDC (20.4~26.4V)

Working temperature: -10~55 ℃

Protection level: IP20

Installation: 35mm DIN rail, ventilation ≥ 5mm (side), ≥ 50mm (top and bottom)

Wiring: 0.2~2.5mm ², screw torque 0.5N · m

3. Interface and indicator lights

Communication: DeviceNet, USB 1.1, EtherNet/IP (EIP)

Display: 7-segment digital tube (node/error code) MS/NS/LOCK/COMM LED

Dialing: Node address (0~63), baud rate (125k/250k/500k)

​Communication function (core)

1. DeviceNet Safety

Secure main station: up to 32 connections (Ver1.0+), supporting unicast/multicast

Secure Slave: Up to 4 connections, maximum 16 byte I/O

Standard Slave: Up to 2 connections, supports Poll/COS/Cyclic

Baud rate: 125k/250k/500kbps, supports automatic detection

2. EtherNet/IP (EIP model)

IP settings: BOOTP or static IP (default 192.168.250.1)

Function: Standard I/O communication, explicit messaging, UDP packets, routing

UDP port: 64000, supports cross network access to DeviceNet devices

3. Remote I/O allocation

Mapped: General state, local I/O state, monitoring data, user tags

Security attribute differentiation: Security data can be used for security circuits; Non secure data is only used for monitoring purposes

Safe I/O Control (Core)

1. Secure input

Channel mode: unused/test pulse input/safe input/standard input

Dual channel mode:

Equivalent dual channel: Only when both channels are turned on simultaneously, is it effective

Complementary dual channel: One NO and One NC cooperation

Diagnosis: Differential time (0-65530ms), incorrect lock (default 1000ms)

2. Test output

Mode: Pulse Test, Standard Output, Shielded Lamp Output

Function: Output diagnostic pulses to detect input circuit short circuits, disconnections, and grounding faults

3. Safe output

Mode: Safe Output/Safe Pulse Test

Diagnosis: overcurrent protection, dual channel linkage, output short circuit detection

Mandatory requirement: Prohibit using test output as safe output

Programming and Function Blocks

1. Programming environment

Software: Network Configurator

Editor: A graphical logic editor that supports direct drag and drop of I/O tags

Capacity: Up to 254 functional blocks for Ver1.0 and above

2. Core functional blocks

ESTOP: Emergency stop button monitoring, supports dual channel

Light Curtain: Safety Light Curtain Monitoring

Safety Gate: Safety Gate monitoring, supporting synchronized time

Two Hand Control: Two Hand Control

Reset/Restart: Manual reset/restart, prevent automatic recovery

Logic: AND, OR, NOT, RS-FF, comparator

Operation mode and fault diagnosis

1. Operation mode

RUN: Normal operation

IDLE: Stop output, can be monitored

CONFIG: Configuration Download

SAFE MODE: System Repair

2. Fault diagnosis

7-segment code display: error code+node number

LED status:

MS green=running; Red=fatal error

NS green=communication is normal; Red=Fault

Yellow LOCK=configuration effective lock

Error History: Record fault type, time, and status

3. Common Error Handling

Error code meaning handling

P4 input power abnormality check V1/G1

P5 output power abnormal inspection V2/G2

Nd DeviceNet disabled (standalone mode) normal

D5/d6/dA Safety communication fault inspection slave station EPI、 line

Maintenance and safety regulations

1. Maintenance function

Contact action counter: Count the number of suction and closing times (0~4294967295)

Accumulated ON time monitoring: Count the duration of power on

Threshold alarm: life warning can be set

2. Mandatory safety taboos

Prohibit using standard I/O, explicit messages, UDP data as security signals

Prohibit overload connection to safety output

It is necessary to use a forced guiding contact relay and directly disconnect the emergency stop

After the power is cut off in the dangerous area, plug and unplug the wiring

Key questions and answers

Question 1: What are the two modes of dual channel safety input for NE1A? What scenarios are they used for? What is the effect of differential time?

answer:

Equivalent dual channel: Both channels are NC normally closed inputs, and simultaneous actions (such as emergency stop buttons and safety switches) must be turned on/off simultaneously to be effective.

Complementary dual channel: one NO and one NC, reverse action, used for safety doors and limit switches.

Differential time: Monitor the interval between changes in two signals, determine faults when timeout occurs, cut off outputs, and prevent switch failure or wiring errors.

Question 2: How many slave stations can NE1A carry as a Safety Master? What are the three recovery strategies after a communication failure?

answer:

Load capacity: Up to 32 secure slave connections for Ver1.0 and above; There are only 16 Pre Ver.

Fault strategy:

Automatic recovery: automatic reconnection after fault elimination

Only stop faulty connections: keep other connections running

Stop all connections: The entire line enters a safe state and needs to be manually reset

Question 3: What is the use of UDP/IP message function with EIP model? What are the communication format and port?

answer:

Purpose: Ethernet devices (PLC/PC) can directly access DeviceNet Safety slave stations through UDP, enabling cross network monitoring without the need for additional gateways.

Specifications:

Port: 64000 (FA00hex)

Command length: Maximum 492 bytes

Response length: maximum 496 bytes

Restrictions: Only Ver1.1 and above – EIP models are supported.