Product Details

The XYCOM 81862-003R1806 is a discontinued rack-mounted 1806 series CNC I/O control board, compatible with XYCOM 8000 series CNC control chassis. This revision is the updated version of 81862-003L1806, 81862-003N1806 and 81862-003P1806, with identical mechanical dimension and backplane pin definition for direct drop-in replacement. It serves as the signal bridge between the CNC main CPU board and field discrete devices including limit switches, proximity sensors, safety interlock switches and relay loads, responsible for digital input acquisition and digital output driving for auxiliary machine functions. The board integrates signal debounce circuits, surge protection and noise filtering components, which suppress contact bounce and electromagnetic interference generated by spindle motors and inverters inside machining workshops to guarantee stable discrete signal transmission. It communicates with the master processor via the dedicated backplane bus, uploading real-time switch status and receiving control commands to manage lubrication pumps, cooling fans, door locks and other auxiliary equipment. Technicians can set input polarity, output mode and station address through on-board DIP switches and jumpers to match different I/O allocation schemes of machine tools. The front panel is equipped with LED indicators for power supply, input signal status, output action and fault alarm, which helps users quickly check signal states, locate wiring faults and verify logic actions during commissioning and daily maintenance. The PCB adopts industrial-grade electronic components and complete EMC suppression design, which can withstand vibration, dust and electromagnetic noise in harsh machining environments to support long-time continuous operation of CNC equipment. This legacy I/O control board is mainly supplied as spare replacement parts for existing XYCOM CNC machine tools. Users need to confirm backplane pin definition, I/O address mapping and host firmware compatibility before installation. A conformal coated version is optional for high humidity, dusty industrial machining sites. This model is widely used in CNC lathes, milling machines, machining centers and old CNC control system retrofit projects.

This CNC I/O control board adopts standard single-slot rack board structure. It draws power from the control system backplane. LED indicators display power status, signal activity and fault alarm 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 I/O address and signal configuration backup for fast recovery after hardware replacement.

This XYCOM 81862-003R1806 I/O control board is widely applied in legacy CNC control racks and machining equipment upgrade projects. It provides reliable digital signal interaction between the CNC master controller and field discrete devices. As a reliable discontinued spare part, the XYCOM 81862-003R1806 retains original bus timing and signal compatibility, and effectively reduces the renovation cost of legacy CNC control system maintenance.