Product Core Brief

• Model: 8106-TI-RT
• Brand: Emerson (PAC8000 I/O)
• Series: PAC8000 Modular I/O Platform
• Core Function: 4-channel RTD/resistance input module for precision temperature measurement and process monitoring.
• Product Type: Analog RTD Input Module
• Input Channels: 4 channels, 2/3/4-wire RTD or resistance
• Condition: New Original / New Surplus (subject to available stock)

Key Technical Specifications

• Part Number: 8106-TI-RT
• Platform: Emerson PAC8000 Modular I/O
• Input Type: RTD (Resistance Temperature Detector) or resistance
• Channel Count: 4 analog input channels
• Wiring Configuration: 2-wire, 3-wire, or 4-wire RTD
• Resolution: 15-bit plus sign
• Scan Speed: 840 ms max per channel
• Current Consumption: 200 mA max
• Supported RTD Types:
  • Pt100 to BS1904 / DIN 43760 / IEC 75
  • Ni120
  • jPt100 to JIS C1604:1989
• Mounting: PAC8000 carrier with Railbus interconnect
• Field Terminals: Snap-on terminal block, replaceable in the field
• Application: General purpose and hazardous area installations
• Communication: Via PAC8000 Bus Interface Module (BIM) or controller

 

Product Introduction (No Fluff)

The Emerson 8106-TI-RT is a 4-channel RTD input module for the PAC8000 modular I/O platform. It accepts 2-, 3-, or 4-wire RTD or resistance sensors, converting temperature signals into digital data for

process control and monitoring systems.

Each module provides four independent analog input channels with 15-bit plus sign resolution and up to 840 ms scan speed. It supports industry-standard RTD types including Pt100 (BS1904/DIN 43760/IEC 75), Ni120, and jPt100 (JIS C1604:1989), making it compatible with a wide range of temperature sensors across different regional standards.

The module draws a maximum of 200 mA from the PAC8000 Railbus backplane. Field wiring connects through a snap-on terminal block that mounts directly to the carrier, allowing quick replacement without rewiring if damaged. The PAC8000 platform supports both general purpose and hazardous area applications, with communication handled through a selectable Bus Interface Module or controller.

 

QA & Testing SOP (Dynamic & Transparent)

RTD input modules are critical for accurate temperature monitoring. Each surplus unit undergoes:

1. Part Number Verification: Confirm the module label reads 8106-TI-RT exactly. Check for PAC8000 platform markings.
2. Visual Inspection: Inspect the module housing, connector pins, and snap-on terminal block for corrosion, bent pins, or physical damage.
3. Railbus Connection Check: Verify the module seats properly in a PAC8000 carrier. Confirm Railbus contacts are clean and free of oxidation.
4. Channel Resistance Test: Apply known resistance values to each of the four channels. Verify the module reads within the expected range for each input.
5. RTD Type Verification: Confirm the module correctly identifies and scales Pt100, Ni120, and jPt100 sensor inputs per configuration.
6. Wiring Mode Test: Test each channel in 2-wire, 3-wire, and 4-wire configurations to verify proper lead compensation.
7. Current Draw Check: Measure module current consumption under load. Confirm it does not exceed 200 mA.
8. Packaging: Pack in anti-static bags with foam cushioning. Protect connector pins and terminal block during transit.

Installation Pitfalls & Guide (Engineer to Engineer)

Verify RTD type matches your sensor. The module supports Pt100, Ni120, and jPt100 standards. Mixing RTD types without reconfiguring the channel will produce incorrect temperature readings.

Select the correct wiring mode. 2-wire connections have no lead compensation and introduce more error. Use 3-wire or 4-wire mode when possible for better accuracy, especially over long cable runs.

Confirm carrier compatibility. The 8106-TI-RT requires a PAC8000 carrier with Railbus. Ensure the carrier has sufficient power budget for the 200 mA draw.

Check hazardous area certification. If installing in a classified area, verify the module and carrier combination carries the required certification for your zone/division.

Replace terminal blocks carefully. The snap-on terminal block is field-replaceable. If damaged, swap it with an identical PAC8000 terminal block to maintain the mechanical keying system.

Document channel assignments. Record which RTD type and wiring mode each channel is configured for before commissioning. This simplifies troubleshooting and future replacements.

Installation Steps:

1. Pre-install: Confirm part number 8106-TI-RT. Verify the PAC8000 carrier is powered down. Check the Railbus power budget.
2. Mount: Snap the module onto the PAC8000 carrier. Verify it seats fully and the Railbus connector engages.
3. Wire: Attach the snap-on terminal block. Connect RTD sensors per the configured wiring mode (2/3/4-wire).
4. Commission: Power up the carrier. Configure each channel for the correct RTD type and wiring mode via the BIM/controller. Verify temperature readings against a known reference.

Technical FAQ

1. What RTD types does the 8106-TI-RT support? It supports Pt100 (BS1904/DIN 43760/IEC 75), Ni120, and jPt100 (JIS C1604:1989). Each channel can be configured independently.

2. Can I use this module with thermocouples? No. The 8106-TI-RT is an RTD/resistance input module. Thermocouple inputs require a different PAC8000 module type.

3. What is the maximum scan speed? 840 ms maximum per channel, with 15-bit plus sign resolution.

4. Is this module rated for hazardous areas? The PAC8000 platform supports hazardous area applications, but certification depends on the specific module/carrier/BIM combination. Verify the certification label for your installation requirements.

5. How much current does the module draw? 200 mA maximum from the PAC8000 Railbus backplane.

6. Can the terminal block be replaced in the field? Yes. The snap-on terminal block is field-replaceable without rewiring if damaged.

7. What warranty do you offer on surplus stock? Terms vary by condition and availability. For surplus industrial modules, we typically provide a short functional guarantee. Confirm details at time of order.

Note: The 8106-TI-RT is an Emerson PAC8000 module, not a GE Multilin protection relay. PAC8000 is Emerson’s modular I/O platform, and this module is commonly found in Emerson process control and SCADA systems.