PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-BTM is a Barrel Temperature Control Module for the SLC 500 system. This intelligent I/O module accommodates four zones of autotuned heat and cool PID loops. Each of the four isolated analog inputs functions as the controlled variable for a loop. The module accepts Type J and Type K thermocouple inputs directly.
A tuning-assisted process algorithm and a PID algorithm run directly on the module. Manipulated variable outputs transmit to the SLC processor table as numeric values or time-proportioned signals. Ladder logic directs these signals to digital or analog output modules to close the loop. The unit provides self-calibration, self-diagnostics, and detection of input open circuits.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Analog Filter | analog filter with low pass digital filter |
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| Analog Inputs | Thermocouple |
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| Backplane Current | (5 Volts) 110 milliamps; (24 Volts)85 milliamps |
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| Backplane Current (24 Volts) | 85 milliamps |
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| Backplane Current (5 Volts) | 110 milliamps |
|---|
| Calibration | once every six months |
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| Category | PLCs |
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| Chassis Location | Any slot except Channel 0 |
|---|
| Compatible Processors | SLC 5/02, -5/03, -5/04 and 5/05 |
|---|
| Connection Hardware | 1746-RT32 |
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| Conversion Type | sigma-delta modulation |
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| Inputs | 4 |
|---|
| Module Type | Barrel Temperature Control Module |
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| No. of Inputs | Four (4) |
|---|
| Sensor Type | Thermocouple Type J; Type K |
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| Slots | 1 |
|---|
| UPC | 612598172696 |
|---|
| Weight | 1.50 lbs (0.68 kg) |
|---|
TECHNICAL INFORMATION
Features
- Four backplane and channel-to-channel isolated thermocouple inputs supporting Type J and Type K sensors.
- Integrated autotuning functions optimized for tuning barrel temperature control loops.
- Selectable barrel and non-barrel control modes for heat-only or heating and cooling operations.
- Sigma-Delta modulation conversion providing 16-bit resolution and an 8 Hertz channel bandwidth.
- Configurable broken thermocouple detection with selectable fail-safe output responses.
- Controlled variable clamping to prevent PID outputs from reaching zero or one hundred percent.
TECHNICAL INFORMATION
Applications
- Closed-loop barrel temperature control requiring multi-zone thermal regulation.
- Heating-only and alternating heating and cooling processes within SLC 500 systems.
- Temperature monitoring systems requiring isolated Type J or Type K thermocouple inputs.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring connects using the 1746-RT32 connection hardware.
- The module provides four backplane and channel-to-channel isolated analog inputs.
- Input voltage ranges cover -50 to 50 millivolts and -100 to 100 millivolts.
TECHNICAL INFORMATION
Installation Guidelines
- Install the single-slot module into any available chassis slot except slot 0.
- The module draws 110 milliamps at 5 Volts and 85 milliamps at 24 Volts.
TECHNICAL INFORMATION
Configuration Guidelines
- Select barrel control mode for heat-only or alternating heating and cooling operations.
- Use non-barrel control mode for heat-only, cool-only, or heat and cool control actions.
- Configure sensor break responses to disable loops or force controlled variables to preset values.
- Enable the appropriate alarm words and bits to monitor loop status.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 processors.
- Incompatible with the SLC 5/01 processor.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 processors. Incompatible with the SLC 5/01 processor.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
Which processors are compatible with the 1746-BTM module?
The module is compatible with SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 processors, but not SLC 5/01.
What thermocouple sensors does the 1746-BTM support?
The module accepts Type J and Type K thermocouples across four isolated channels.
What wiring hardware connects field sensors to the module?
Field wiring connects to the 1746-BTM using the 1746-RT32 connection hardware.
How does the module respond to a broken thermocouple?
Responses can disable the loop, force a break control value, or force a manual percentage output.
What chassis slots can accommodate the 1746-BTM module?
The module installs into any chassis slot except slot 0.
