Siemens 6ES7134-7SD51-0AB0 SIMATIC ET 200iSP 4AI RTD PT100/NI100 Ex ib Remote I/O Module

The Siemens 6ES7134-7SD51-0AB0 is a SIMATIC ET200iSP intrinsically safe electronic module with 4 analog inputs for resistance thermometers, PT100 and NI100, plus direct resistance measurement up to 600 ohms. It offers 16-bit resolution, 0.1 percent basic error limit, and ATEX/IECEx Ex ib [ia Ga] IIC T4 Gb certification for Zone 1 gas and Zone 21 dust areas, with IP30 screw/spring-type terminal connections.

Technical Specifications

Certifications & Standards

• GL
• ABS
• BV
• DNV

Selection Notes

Supports 2-, 3-, and 4-wire RTD connections on the same channel, so lead-resistance compensation can be matched to the sensor cable run without swapping modules; a 4-wire connection cancels lead resistance entirely for the tightest accuracy, while 2-wire is adequate for short runs. Basic error limit is 0.1% at 25 degC but widens to 0.15% across the full operating temperature range, worth checking against the process tolerance before specifying. The 320 ms max cycle time across all 4 channels is a real-time budget item if the RTD readings feed a fast control loop rather than slow trend monitoring.

Applications

Sized for temperature measurement circuits in ATEX/IECEx Zone 1 gas or Zone 21 dust areas and marine/offshore hazardous locations, such as process vessel or pipeline RTD monitoring on ET200iSP stations, where the sensor wiring itself must remain intrinsically safe.