YASKAWA JZNC-MRK12-1E Machine interface unit

The YASKAWA JZNC-MRK12-1E is a specialized Safety Signal Interface Board (often referred to as a Machine Interface Unit)

 specifically designed for the Yaskawa Motoman DX100 and DX200 robot controllers.

 It serves as the primary gateway for hardware-level safety signals between the robot and the surrounding work cell.

Introduction

The JZNC-MRK12-1E is responsible for managing critical safety functions such as Emergency Stops (E-Stops), Safeguard Interlocks, and deadman switch signals. 

It acts as the bridge between the robot's internal logic and external safety hardware (like light curtains, safety gates, and PLC safety relays). 

Unlike standard I/O boards, this board is built with redundancy to comply with international robotic safety standards (ISO 10218).

Technical Parameter Table

Product Advantages and Features

Dual-Channel Redundancy: Designed with dual circuits for all critical safety inputs to ensure that a single component failure does not lead to a loss of safety function.

Integrated Relay Control: Directly manages the hardware handshake required to drop power to the servo amplifiers when a safety violation occurs.

Plug-and-Play for DX Series: Fits directly into the dedicated interface slots of the DX100/DX200 cabinet, simplifying installation.

High Noise Immunity: Features optical isolation to prevent electrical interference from welding power sources or heavy motors from triggering false safety alarms.

Standardized Connectors: Uses industrial-grade connectors that allow for quick disconnection and maintenance without individual wire handling.

Application Cases

Integrated Welding Cells: Connecting the robot's safety loop to the welding curtains and the operator's "deadman" pedal.

Multi-Robot Coordination: Linking the E-Stop circuits of multiple robots so that if one robot is manually stopped, the others in the shared space also halt.

Automated Assembly Lines: Interfacing with Safety PLCs to manage entry/exit protocols for human operators into the robot's working envelope.

CNC Tending: Synchronizing safety signals between the CNC machine door interlocks and the robot's motion state.

Related Models & Other Models in the Same Series

The JZNC-MRK series contains various revisions and specialized versions depending on the region (e.g., Japan vs. Europe/USA) and specific controller options:

Need help with wiring or "Safety Logic" errors?

The JZNC-MRK12-1E is the most common cause of "External Emergency Stop" alarms or "Safety Signal Discordance" errors. 

If you are experiencing these, it often points to a loose jumper on the board or a failed external safety relay.