Description
Product Overview
Reliable digital input monitoring is essential for PLC-controlled machinery, where a single missing signal can prevent a sequence from advancing or trigger an unexpected interlock. The Eaton XIOC-16DI is a 16-channel digital input module for the XC100 and XC200 modular PLC families. It collects discrete signals from field devices and transfers their states to the controller for use in machine logic, status monitoring, and sequence control. Typical applications include reading limit switches, push buttons, auxiliary contacts, and compatible 24 VDC sensors.
The module operates with a nominal 24 VDC input and a permitted input range of 20.4–28.8 VDC. Published technical data specifies a typical input current of 4.0 mA and typical input impedance of 5.9 kΩ. The documented IEC 61131-2 Type 1 signal thresholds are 15 VDC or less for an ON signal and 5 VDC or less for an OFF signal; signals between those limits should not be treated as a guaranteed valid state without considering the applicable input specification. Input debounce is specified at up to 5 ms, typically 4 ms, helping reject brief signal fluctuations. The module has IP20 protection, a typical operating temperature range of 0°C to +55°C, and a maximum power loss of 1.6 W.
When replacing an Eaton XIOC-16DI, verify the complete model code and catalog number, the installed XC100/XC200 expansion arrangement, and the terminal configuration. Confirm whether field devices provide compatible DC signals and check the common-reference wiring before reconnecting the module. If an input remains inactive, investigate sensor supply, polarity, common potential, terminal contact, and the PLC input mapping rather than assuming the module itself has failed.
Eaton lists the XIOC-16DI as a product to be discontinued. For legacy installations, request photographs of the actual module and its identification label, confirm its condition, and obtain functional test information where available. A matching catalog number is an important first check, but the unit must also suit the electrical and configuration requirements of the installed controller.
Product Introduction
Intermittent field signals can interrupt machine sequences and create unnecessary troubleshooting time. The Eaton XIOC-16DI provides 16 discrete 24 VDC inputs for XC100/XC200 PLC systems, with typical 4 mA input current and defined ON/OFF thresholds.
For replacement work, check the input voltage range, common-reference wiring, and terminal arrangement. Confirm the existing PLC configuration and input mapping before restoring the equipment to service.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | |
| Manufacturer | Eaton / Moeller |
| Catalog Number | 257892 |
| EAN | 4015082578923 |
| Product Type | Digital input module |
| Compatible PLC Families | XC100 / XC200 |
| Number of Input Channels | 16 |
| Input Type | DC digital input |
| Rated Input Voltage | 24 VDC |
| Permitted Input Voltage | 20.4–28.8 VDC |
| Typical Input Current | 4.0 mA |
| Typical Input Impedance | 5.9 kΩ |
| ON Threshold | 15 VDC or less, per listed Type 1 limit-value specification |
| OFF Threshold | 5 VDC or less, per listed Type 1 limit-value specification |
| Input Debounce | Up to 5 ms; typically 4 ms |
| Maximum Power Loss | 1.6 W |
| Internal Supply Consumption | Approximately 51 mA, with fitted modules, per product listing |
| Electrical Standard | IEC/EN 61131-2 |
| Connection | Plug-in terminal block; screw or spring-clamp options |
| Dimensions | Approximately 100 × 95 × 30 mm (depth × height × width) |
| Weight | Approximately 0.135–0.16 kg, depending on published reference |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | −25°C to +70°C |
| Protection Rating | IP20 |
| Lifecycle Status | Listed as to be discontinued |
XIOC-16DI
Related Products
These Eaton XI/OC modules provide alternative input counts or complementary I/O functions. They serve different purposes and should not be considered direct replacements without checking the controller configuration.
- XIOC-8DI — Eight-channel, 24 VDC digital input module for systems requiring fewer input points.
- XIOC-32DI — Thirty-two-channel, 24 VDC digital input module for higher-density signal collection.
- XIOC-16DO — Sixteen-channel, 24 VDC transistor output module for switching suitable field loads.
- XIOC-8DO — Eight-channel digital output module for applications with fewer output points.
- XIOC-12DO-R — Twelve-channel relay output module for applications that require relay contacts.
- XIOC-16DX — Configurable digital I/O module with a combination of input and output functions.
- XIOC-4T-PT — Temperature input module for compatible Pt100/Pt1000 measurement applications.
- XIOC-BP-2 — Two-slot expansion backplane reference for supported XC100/XI/OC arrangements; confirm the exact system configuration.
Frequently Asked Questions
What is the Eaton used for?
It reads 16 discrete DC signals and makes their states available to a compatible XC100/XC200 PLC. Typical uses include switch feedback, machine-position detection, operator push buttons, and interlock monitoring.
Can I hot-swap the ?
Do not assume live replacement is supported in your installation. Follow Eaton’s maintenance instructions and the machine’s isolation procedure, and verify whether the controller and expansion configuration permit module replacement while powered.
Does the support 24 VDC sensors?
Yes, its specified input voltage is 24 VDC, with a permitted range of 20.4–28.8 VDC. Confirm the sensor output type, polarity, common-reference arrangement, and input current requirements before wiring it.
Can I replace the with an XIOC-32DI?
Not as a simple like-for-like exchange. The XIOC-32DI has twice as many input channels and uses a different module specification. Check the available expansion position, wiring layout, controller configuration, and I/O mapping before considering a change.
How do I verify a replacement module’s authenticity and condition?
Check the Eaton identification label, model code , catalog number 257892, terminal block, and housing. Request photographs of the actual unit and available functional test records. Confirm whether the unit is unused, used, or refurbished; packaging and labeling alone do not establish electrical condition.
Will replacing the erase the PLC program?
The is an input module, not the main PLC program-storage device. However, replacing it may affect signal availability or the I/O configuration. Back up the PLC project, record the existing channel assignments, and verify all connected input states after installation.
What should I check before ordering this discontinued module?
Verify the exact model and catalog number, /XC200 compatibility, 24 VDC field wiring, terminal configuration, condition, test evidence, and warranty terms. If the existing module is intermittent, also check the sensor supply, common wiring, and terminal contacts to avoid replacing a healthy module unnecessarily.
