Xnx Universal Transmitter Quick Start Guide _top_ Jun 2026

| Terminal | Label | Function | Connection | | :--- | :--- | :--- | :--- | | 1 | V+ | 24 VDC Power | +24V from PS | | 2 | V- | 0 VDC Power | Common/RTN | | 3 | S (4-20) | Analog Signal Out | PLC Analog Input | | 4 | T+ (RS-485) | Modbus A / Data + | D+ / TX+ | | 5 | T- (RS-485) | Modbus B / Data - | D- / TX- | | 6 | SHLD | Cable Shield Drain | Earth Ground | | 7 | ALARM NC | Normally Closed Relay | External Siren/Light | | 8 | ALARM COM | Relay Common | Power source for alarm | | 9 | ALARM NO | Normally Open | Default wiring |

: Basic troubleshooting steps to help users resolve common issues that might arise during initial setup or use.

Always isolate and lock out power sources before opening the transmitter enclosure in a hazardous area. Xnx Universal Transmitter Quick Start Guide

Immediately following the zero calibration, the screen will prompt you for . Select Yes .

Bolt the XNX firmly to the mounting surface or pipe clamp assembly using M10 or 3/8-inch steel fasteners. | Terminal | Label | Function | Connection

Ensure the calibration gas concentration matches the expected configuration range of your specific sensor cartridge.

The you are deploying (Electrochemical, Catalytic Bead, or Infrared). The target gas and full-scale range configuration. Select Yes

Warnings about power disconnection, electrostatic discharge (ESD), and hazardous gas exposure are placed prominently, not hidden in fine print. A compliance note (CE, UKCA, FCC) is included where relevant.

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: Select the target gas from the configured sensor menu.

Attach the calibration adapter and open the gas regulator to apply the gas at 0.5 L/min.

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