1. 

2. Main Features

• 8 fully isolated RTD input channels

• Supports standard RTD types: PT100, PT200, PT500, PT1000, Cu50, Cu100

• Compatible with 2-wire, 3-wire and 4-wire connection modes

• 16-bit high resolution conversion, low temperature drift and good linearity

• Automatic lead resistance compensation for 3-wire and 4-wire mode

• 1500 VDC isolation between field side and internal circuit

• Software configurable sensor type, measuring range, filter and alarm parameters

• Built-in diagnosis: open circuit, short circuit and over-limit fault detection

• Wide industrial temperature range, stable continuous operation

• Standard 35 mm DIN rail mounting, compact structure and easy wiring

• Compliant with industrial EMC anti-interference standards

3. Technical Specifications

3.1 General Parameters

3.2 RTD Input Parameters

3.3 Communication & Diagnosis

4. Safety Precautions

1. Installation, wiring and maintenance must be performed by qualified professional technicians.

2. Disconnect all power supply before wiring, disassembly or module replacement to avoid electric shock and equipment damage.

3. Do not install the module in flammable, explosive, dusty or strong corrosive environment without explosion-proof certification.

4. Use shielded twisted-pair cables for RTD signal wiring; separate signal cables from high voltage power cables.

5. The cable shield shall be grounded at single end only to avoid circulating current interference.

6. Strictly follow 2-wire / 3-wire / 4-wire standard wiring; wrong connection will cause large measurement error.

7. Do not input resistance or voltage beyond the rated range of each channel.

8. It is forbidden to disassemble, modify or refit the internal circuit without official authorization.

5. Installation and Terminal Definition

5.1 DIN Rail Installation

1. Fix the 35 mm standard DIN rail firmly on the installation panel.

2. Hook the upper buckle of the module onto the DIN rail edge.

3. Press the module downward until the bottom lock snaps tightly.

4. Shake the module slightly to confirm firm installation without loosening.

5.2 Terminal Pin Assignment

5.3 Wiring Instructions

1. Strip about 6 mm insulation layer at wire ends, insert into corresponding terminals and tighten screws moderately.

2. 2-wire RTD wiring: Connect two sensor wires to terminal A and B, leave terminal C empty.

3. 3-wire RTD wiring: Connect three sensor wires to terminal A, B and C respectively.

4. 4-wire RTD wiring: Follow standard 4-wire distribution to match A, B, C terminals.

5. For long-distance signal transmission, use shielded twisted-pair cable with single-end shielding grounding.

6. Avoid laying signal cables in parallel with high-power AC lines to reduce electromagnetic interference.

6. Parameter Configuration

1. Add 12P1732X062 module in DCS or PLC configuration software.

2. Set module station address, rack and slot number according to actual installation position.

3. Configure each channel parameters one by one:

   • Select RTD sensor type

   • Choose 2-wire / 3-wire / 4-wire connection mode

   • Set temperature engineering range and unit (℃ / ℉)

   • Adjust digital filter time constant

   • Enable open circuit, short circuit and over-range alarm function

4. Download configuration to controller and module.

5. Check real-time temperature value to confirm normal acquisition accuracy.

7. Operation Description

7.1 Power-on Self-test

7.2 Main Functions

• Collect resistance signal from field RTD temperature sensors.

• Complete lead resistance compensation, linear conversion and digital filtering internally.

• Convert resistance value into accurate temperature value and upload to DCS/PLC in real time.

• Realize channel fault diagnosis and upload alarm information when open circuit, short circuit or over-limit occurs.

• Accept remote configuration parameters to adapt to different sensor types and wiring modes.

7.3 Indicator Status Description

8. Daily Maintenance

1. Regularly check terminal wiring tightness to prevent oxidation, corrosion and loose contact.

2. Clean module surface dust with dry soft cloth only; do not use liquid or chemical solvents.

3. Keep working ambient temperature and humidity within specified range.

4. Periodically inspect signal cables for aging, damage and poor contact, replace in time if abnormal.

5. Regularly calibrate with standard resistance box to ensure long-term measurement accuracy.

9. Troubleshooting

1. Power indicator not lit

   Cause: No 24VDC input, power polarity reversed or power wire broken

   Solution: Check power supply circuit and correct wiring polarity
2. System cannot recognize the module

   Cause: Wrong module address, loose backplane contact or communication failure

   Solution: Confirm address setting, re-seat module and check bus connection
3. Temperature value unstable or jumping

   Cause: Loose terminal wiring, no shielding measures or strong electromagnetic interference

   Solution: Fasten wiring, use shielded cable and single-end grounding, stay away from interference sources
4. Large temperature measurement deviation

   Cause: Wrong RTD type or mismatched 2/3/4-wire configuration

   Solution: Re-select sensor type and match correct connection mode
5. Channel open circuit alarm

   Cause: RTD sensor damaged, signal wire broken or poor contact

   Solution: Check field sensor and wiring connection status

10. Warranty Statement