Description
OMRON NE2A‑DNS21
Technical Specifications: DeviceNet slave protocol compliance; support baud‑rate 125 k / 250 k / 500 kbps; maximum input/output data length 128 bytes each; bus side electrical isolation; power supplied via DeviceNet bus; operating temperature 0‑55°C; storage temperature ‑20‑75°C; humidity 10‑90%RH without condensation; DIN‑rail mounting; multi‑color LED indicators for power, bus communication and fault status; conforms to DeviceNet and international functional‑safety related standards.
Functional Features: Realizes safety‑controller data interaction with DeviceNet master station; electrical isolation between bus side and safety‑controller internal circuit prevents fault propagation; multiple LED status indicators support on‑site rapid fault diagnosis; supports complete DeviceNet diagnostic message upload; compact DIN‑rail installation structure; matches NE‑series safety‑controller system architecture.
Application Scenarios: Distributed safety‑control system for automated production lines; safety‑signal transmission on DeviceNet field‑bus networks; safety‑controller interconnection with PLC main control systems; safety‑related data collection for large‑scale automation plants; spare‑part replacement for legacy NE‑series safety systems.
Performance Parameters: Bus communication response time meets industrial safety‑control timing requirements; isolation circuit suppresses field surge interference; supports long‑term continuous cabinet‑internal operation.
Material Composition: Black V0 flame‑retardant engineering‑plastic housing; internal FR‑4 multilayer PCB board; DeviceNet protocol processing chip; opto‑coupler isolation components; screw‑type bus‑signal terminals; high‑brightness multi‑color LED indicators; metal DIN‑rail spring buckle.
Structural Features: Thin rectangular DIN‑rail module form factor; spring‑loaded DIN‑rail buckle on rear face; front‑panel screw terminals for DeviceNet bus wiring; multi‑group LED indicators on front panel showing power, bus activity and fault conditions; side mechanical latch for stacking installation with other NE‑series modules.
Working Principle: Safety‑controller internal safety data transmits to NE2A‑DNS21 through internal backplane. Module completes DeviceNet protocol encapsulation and sends data onto DeviceNet bus to master‑station equipment. At the same time, module receives commands and data sent by master station, executes protocol parsing, and transmits valid data back to safety‑controller internal unit. Module continuously monitors bus‑link quality and outputs fault indication when communication abnormalities occur.
Installation Requirements: Mount module on standard cabinet DIN rail; DeviceNet bus cable uses dedicated shielded cable; install terminal resistors at both physical ends of DeviceNet trunk line; separate bus‑signal cables from high‑power motor and inverter cables; cabinet shall implement reliable protective grounding.
Usage Notes: Set module baud‑rate consistent with DeviceNet master‑station configuration; perform all wiring operations under power‑off condition; hot‑swap bus cable is forbidden; cannot operate under condensation or corrosive‑gas environment; check terminal screw tightness on a regular basis.
