OMRON XWT Series Modules

Technical Dossier

Product Details And Specifications

OMRON XWT Series: Comprehensive Module Range and Technical Overview

The OMRON XWT Series represents OMRON's dedicated line of DeviceNet-compatible remote I/O expansion units, engineered for distributed control architectures in heavy industrial environments. Deployed extensively across chemical processing plants, petroleum refineries, water treatment facilities, and nuclear auxiliary systems, the XWT Series provides a standardized, modular I/O expansion layer that interfaces directly with OMRON CJ-series and CS-series PLCs via DeviceNet fieldbus. Its compact DIN-rail form factor, IP20 protection rating, and deterministic scan-cycle behavior make it a preferred choice for plant engineers requiring reliable, high-density I/O distribution without the overhead of a full remote rack system. Installed base figures across Asia-Pacific and EMEA industrial sectors confirm the XWT Series as a long-cycle platform — systems commissioned in the early 2000s remain operational today, creating sustained demand for spare modules, replacement units, and lifecycle extension support.

The Evolution of XWT Series Architecture

The XWT Series was introduced as part of OMRON's broader DeviceNet ecosystem strategy, designed to complement the CJ1/CS1 PLC platforms and their associated DeviceNet master units (DRM21, CJ1W-DRM21). Early XWT units established the core architecture: a DeviceNet slave node with a fixed I/O block, configurable node address via rotary switches, and a standardized 24 VDC power input. The series was segmented into discrete input (ID), discrete output (OD), and mixed I/O (MD) variants, with point counts ranging from 8 to 32 per module depending on model.

As industrial networks evolved toward EtherNet/IP and IO-Link, OMRON introduced the XWT-IF series as a gateway-capable successor, allowing XWT I/O blocks to be aggregated under an EtherNet/IP adapter. This architectural bridge extended the operational life of existing XWT field wiring infrastructure while enabling migration to modern network topologies. For installations where DeviceNet infrastructure remains in place, the original XWT modules continue to be the correct replacement part — no firmware or hardware substitution is available without network topology changes.

The XWT Series is currently classified as a mature/end-of-active-production platform. OMRON continues to supply select models through authorized channels, but lead times have extended significantly. Third-party MRO suppliers and certified refurbishers represent the primary sourcing channel for rapid-replacement scenarios.

XWT Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed models within the OMRON XWT Series. Classifications are based on I/O type and point count.

Discrete Input Modules (DI)

• XWT-ID16: 16-point 24 VDC discrete input expansion unit, DeviceNet slave, NPN/PNP selectable, DIN-rail mount
• XWT-ID08: 8-point 24 VDC discrete input expansion unit, DeviceNet slave, compact form factor for space-constrained panels
• XWT-ID32: 32-point 24 VDC discrete input expansion unit, high-density DI block for large-scale distributed I/O nodes

Discrete Output Modules (DO)

• XWT-OD16: 16-point 24 VDC discrete output expansion unit, DeviceNet slave, transistor sink output, 0.5 A per point
• XWT-OD08: 8-point 24 VDC discrete output expansion unit, DeviceNet slave, suitable for solenoid valve and relay drive applications
• XWT-OD32: 32-point 24 VDC discrete output expansion unit, high-density DO block, short-circuit protection per output group

Mixed I/O Modules (DI/DO)

• XWT-MD16: 8DI / 8DO mixed I/O expansion unit, DeviceNet slave, single-node address for combined I/O applications
• XWT-MD32: 16DI / 16DO mixed I/O expansion unit, high-density mixed block for compact machine control nodes

Interface & Communication Adapters

• XWT-IF01: EtherNet/IP adapter unit for XWT I/O blocks, enables migration from DeviceNet to EtherNet/IP without rewiring field devices
• XWT-IF02: EtherNet/IP adapter with dual-port daisy-chain topology support, DLR (Device Level Ring) compatible
• XWT-IF11: DeviceNet adapter unit for XWT I/O blocks, standard DeviceNet slave interface, node address 0–63
• XWT-IF12: DeviceNet adapter with extended diagnostics output, supports explicit messaging for configuration read-back

Power Supply & Terminal Blocks

• XWT-TBF04: 4-slot terminal block for XWT I/O block field wiring, screw-clamp type, 0.2–2.5 mm² wire range
• XWT-TBF08: 8-slot terminal block for XWT I/O block field wiring, compatible with all XWT-ID/OD/MD modules
• XWT-PD01: Power distribution block for XWT series, provides 24 VDC bus power to up to 8 I/O blocks in a node assembly
• XWT-END01: End plate for XWT node assembly, mechanically locks the I/O block stack and provides bus termination

Sourcing Hard-to-Find & Obsolete XWT Series Parts

DriveKNMS maintains a dedicated inventory program for OMRON XWT Series modules, with particular focus on models that have transitioned to limited availability or end-of-production status. Our sourcing network spans certified MRO distributors, factory-surplus channels, and tested-refurbished stock — enabling same-week dispatch for critical plant maintenance scenarios.

For plant operators running DeviceNet-based XWT nodes in facilities with 10+ year maintenance cycles (common in petrochemical and power generation sectors), DriveKNMS provides: verified-functional replacement units with full test documentation, cross-reference support for identifying equivalent models when original SKUs are discontinued, and long-term reservation agreements for facilities requiring guaranteed stock availability over multi-year maintenance windows.

All XWT modules sourced through DriveKNMS are individually tested against OMRON's published electrical specifications prior to dispatch. Certificates of conformance are available on request for regulated industries.

Quality Control for the XWT Series Range

The XWT Series presents specific test requirements due to its DeviceNet bus interface and modular backplane architecture. DriveKNMS applies the following test protocol to all XWT units processed through our facility:

• DeviceNet Node Enumeration Test: Each unit is connected to a live DeviceNet segment and verified to enumerate correctly at its configured node address using OMRON CX-Integrator or equivalent network configuration tool.
• I/O Point Functional Test: All discrete input and output points are individually exercised at 24 VDC nominal. Input threshold voltage and output saturation voltage are measured and logged.
• Bus Termination Integrity Check: Internal bus termination resistors (where applicable) are verified for correct impedance (121 Ω ±1%) to ensure signal integrity on the DeviceNet segment.
• Power Consumption Verification: Supply current draw is measured at 24 VDC and compared against OMRON's published specification (typically 80–150 mA depending on model) to detect degraded internal regulators.
• Thermal Cycling Inspection: Units are inspected post-thermal-cycle for connector integrity, PCB solder joint condition, and housing deformation — common failure modes in modules recovered from high-ambient-temperature installations.

For sourcing inquiries, technical cross-reference requests, or bulk procurement of OMRON XWT Series modules:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com