Description
Product Overview
Reliable discrete output control is essential for PLC systems that operate valves, contactors, pilot relays, and machine-status indicators. The Eaton XIOC-16DO is a 16-channel digital output module designed for the XC100 and XC200 modular PLC families. It uses transistor outputs of the source type, switching 24 VDC signals to external loads. This configuration suits machine-control applications that require multiple discrete commands from a compact I/O assembly.
The Eaton XIOC-16DO provides 16 output channels, each with a rated operational current of 0.3 A. The documented maximum current per common potential terminal is 8 A, so engineers must consider both individual channel loading and the aggregate load on each common connection. The module uses optocouplers for electrical isolation between the outputs and the I/O bus, diode-based overvoltage protection, and green LED status indication. Its plug-in terminal block supports field wiring, while the module’s compact 30 mm width helps conserve cabinet space. Short-circuit protection is not listed as a feature of the standard XIOC-16DO; the separate XIOC-16DO-S variant is specified as short-circuit protected.
For replacement planning, match the full model code and catalog number rather than selecting a module based only on its channel count. The XIOC-16DO is intended for Eaton XC100/XC200 systems and requires the correct expansion arrangement and compatible terminal accessories. Before commissioning, confirm the external 24 VDC output supply, polarity, common-terminal current, field wiring, and load characteristics. Inductive loads may require appropriate suppression according to the equipment design.
Eaton lists the XIOC-16DO as a product to be discontinued. When sourcing a spare, check the actual module label, connector condition, output-channel operation, and available test evidence. The -S may be worth evaluating when short-circuit protection is required, but it should not be treated as a direct substitute until the protection behavior, current ratings, and application requirements have been checked.
Product Introduction
A failed digital output can prevent a PLC from energizing a valve, relay, or machine indicator even when the controller continues running. The Eaton provides 16 source-type transistor outputs at 24 VDC, with a rated 0.3 A per channel for discrete machine-control tasks.
Designed for XC100/XC200 systems, this compact module fits a modular I/O expansion arrangement. Verify total output loading, wiring, and the exact model suffix before replacement.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | |
| Manufacturer | Eaton / Moeller |
| Catalog Number | 257896 |
| EAN | 4015082578961 |
| Product Type | Digital output module |
| Compatible PLC Families | XC100 / XC200 |
| Number of Outputs | 16 |
| Output Type | Transistor, source type |
| Output Voltage | 24 VDC nominal |
| Permitted Output Voltage | 20.4–28.8 VDC, per published technical data |
| Rated Current per Channel | 0.3 A |
| Maximum Current per Common Terminal | 8 A |
| Minimum Switching Current | 1 mA |
| Residual Current at Logic 0 | 0.1 mA |
| Output Switching Delay | Less than 0.3 ms ON; less than 1 ms OFF, per published technical data |
| Electrical Isolation | Optocouplers between outputs and I/O bus |
| Overvoltage Protection | Diode |
| Short-Circuit Protection | Not specified for standard |
| Status Indication | Green LED |
| Connection | Plug-in terminal block |
| Internal 5 VDC Current Consumption | Approximately 50 mA |
| Dimensions | 100 × 95 × 30 mm (depth × height × width) |
| Weight | Approximately 0.135 kg |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | −25°C to +70°C |
| Protection Rating | IP20, as listed in technical references |
| Lifecycle Status | Listed as to be discontinued |
XIOC-16DO
Related Products
These Eaton XI/OC modules provide alternative output types, channel counts, or complementary I/O functions. Check the PLC configuration and electrical requirements before selecting a substitute.
- XIOC-8DO — Eight-channel, 24 VDC transistor output module for applications requiring fewer output points.
- XIOC-32DO — Thirty-two-channel transistor output module for higher-density output applications; its per-channel current rating differs from the .
- XIOC-12DO-R — Twelve-channel relay output module for applications requiring relay switching rather than standard transistor outputs.
- XIOC-16DI — Sixteen-channel, 24 VDC digital input module for receiving discrete field signals.
- XIOC-8DI — Eight-channel, 24 VDC digital input module for smaller input configurations.
- XIOC-16DX — Configurable digital I/O module for applications needing a mix of input and output points.
- XIOC-BP-2 — Two-slot expansion backplane used in supported XI/OC expansion arrangements.
- XIOC-TERM-18S — Screw-terminal accessory for compatible XI/OC modules; verify terminal compatibility with the installed hardware.
Frequently Asked Questions
What is the Eaton used for?
It provides 16 discrete 24 VDC transistor outputs for Eaton XC100/XC200 PLC systems. Typical applications include switching interface relays, indicator lamps, and suitable control loads within the module’s electrical ratings.
Can I hot-swap the ?
Do not assume that live replacement is supported. Follow the PLC manufacturer’s isolation and maintenance procedure, remove field power as required, and verify the system’s rules for changing I/O modules before removing the unit.
Does the have built-in short-circuit protection?
The standard documentation does not specify short-circuit protection as a feature. The separate -S variant is listed as short-circuit protected. Confirm the exact model and its electrical ratings before choosing between them.
Can I replace the with the -S?
Possibly, but do not assume direct interchangeability. Both have 16 transistor output channels, yet protection behavior and current ratings differ. Check the wiring, load characteristics, common-terminal loading, and PLC documentation before making the change.
How do I verify a replacement module’s authenticity and condition?
Check the Eaton nameplate, catalog number 257896, terminal block, housing, and status LEDs. Request photographs of the actual unit and available functional test records. Confirm whether it is unused, used, or refurbished; packaging alone does not establish operational condition.
Will replacing the erase the PLC program?
The module is a discrete output module, not the PLC’s main program-storage device. However, changing an I/O module can affect the system configuration or output behavior. Back up the PLC project, document the existing I/O mapping, and verify output operation after replacement.
What should I check before ordering this discontinued module?
Confirm the complete designation, catalog number 257896, XC100/XC200 compatibility, terminal arrangement, and field-load requirements. Ask about the unit’s condition, test procedure, warranty, and return terms. Check the required output current per channel and per common terminal before reconnecting loads.
