NX3204 — 4-ch RTD Input

The NX3204 measures temperature using resistance sensors (PT100, PT1000, Ni100, Ni1000) over 4 independent 2-wire or 3-wire channels. A microprocessor linearizes the resistance values and converts them to temperature with ±0.1 °C resolution at 16-bit output.

Hardware

Connection

n°	Item	Description
1	RUN LED	Green — EtherCAT state
2	ERROR LED	Red — EtherCAT error
3	I/O LEDs	Yellow — 4 RTD input state
4	I/O connectors	Removable terminals
5	Internal Bus	Power supply and EtherCAT bus

Internal Bus

RTD Sensor Connection

LED States

LED	State	Meaning
On/Run	Off fixed	Initialization
On/Run	Slow blinking	Pre-Operational
On/Run	Single blink + pause	Safe Operational
On/Run	On fixed	Operational
On/Run	Off or fast blinking	Boot
Error	On fixed	No connection

Software

EtherCAT I/O Mapping — TxPDO

Channel	Value
RTD Input 1–4	INT16 each (temperature × 10, °C)

SDO Configuration — SDO 8000h

Sensor type selection per channel (default: PT1000):

Index	SubIndex	Description
8000h	1–4	Sensor type for channels 1–4

Technical Data

Parameter	Value
Channels	4
Sensor types	PT100, PT1000 (default), Ni100, Ni1000
Temperature resolution	±0.1 °C
Update time	60 ms
Module accuracy	0.5 °C full scale @ 25 °C ambient
Resolution	16 bit
Temperature range PT100	−200 °C … 850 °C
Temperature range PT1000	−200 °C … 350 °C
Temperature range Ni100	−60 °C … 250 °C
Temperature range Ni1000	−60 °C … 180 °C
Current absorbed	30 mA

Module Installation

Mount on DIN rail (DIN EN 60715). Connect to the left via the T-bus connector. Always power off before inserting.