Product Details

The XYCOM 121470-001 is a discontinued optically isolated digital input module built for legacy VME industrial control systems. It is equipped with 8 isolated digital input channels, designed to read discrete on-off signals from proximity switches, limit sensors, relay contacts and field detectors, then transmit status data to the VME host CPU for logic judgment and process monitoring. The opto-coupler isolation design separates the field side and bus side electrically, effectively blocking common mode interference and transient surge voltage, which protects the main controller from damage caused by field noise and voltage spikes. Each channel supports 24VDC signal input, and can recognize level signals and pulse signals for equipment status detection, event counting and alarm trigger tasks. The module adopts standard 6U Eurocard form factor, compatible with XYCOM VME chassis and backplane, and it can work together with analog modules, CPU boards and communication cards to build a complete distributed I/O control system. Onboard LED indicators correspond to each channel, showing real-time input status and fault information for quick inspection and troubleshooting. Engineers can set base address and interrupt assignment via onboard jumpers to match the bus layout of the existing control system. This legacy digital input module is mainly supplied as spare replacement parts for old automation systems. Users need to confirm signal polarity, wiring definition and VME bus configuration before installation. A conformal coated version is optional for high humidity, dusty industrial sites. This model is widely used in packaging machinery, material handling equipment, chemical process monitoring and old production line renovation projects.

This digital input module adopts standard 6U Eurocard form factor. It draws power from VME backplane, each channel with independent optical isolation. LED indicators display power status, channel input and fault status for convenient on-site inspection. The operating temperature range is 0°C to 50°C, storage temperature ranges from -40°C to 85°C, relative humidity 5% to 95% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports jumper configuration backup for fast recovery after hardware replacement.

This XYCOM 121470-001 digital input module is widely applied in VME control cabinets, field discrete signal acquisition stations and legacy DCS retrofit projects. It provides stable isolated digital signal collection between field sensors and the VME host controller. As a reliable discontinued digital I/O spare part, the XYCOM 121470-001 retains original signal wiring and channel configuration logic, and effectively reduces the renovation cost of legacy industrial control system maintenance.