Description
The GE Fanuc IC660TSA020A is a high-precision, 6-channel Thermocouple Input Block belonging to the Genius I/O distributed system family. It is specifically designed to interface temperature sensors directly with a GE Series 90-70, Series 90-30, or PACSystems RX3i controller across a Genius bus network, providing digitized temperature data with high resolution and robust electrical isolation.
Product Introduction
The IC660TSA020A acts as a specialized analog-to-digital converter for temperature measurement. It supports a wide variety of thermocouple types (J, K, T, E, R, S, B, and N) as well as millivolt (±100mV) signals. The “A” version denotes a specific revision that includes the electronic assembly and the required terminal block.
Each of the six channels is individually configurable, allowing for mixed sensor types on a single block. The module features integrated Cold Junction Compensation (CJC) and sophisticated diagnostics, such as open-wire detection and over-range/under-range reporting. Its distributed nature allows it to be mounted close to the process, significantly reducing the cost of expensive thermocouple extension wire runs back to a central control room.
Product Parameters (Datasheet)
The following specifications detail the technical and operational profile of the IC660TSA020A:
| Parameter | Specification |
| Model Number | IC660TSA020A |
| Input Channels | 6 Differential Channels |
| Input Types | Thermocouples (J, K, T, E, R, S, B, N) and ±100mV |
| Resolution | 15-bit plus sign (0.1° resolution for most types) |
| Accuracy | ±1°C (typical, varies by TC type and range) |
| Cold Junction Comp. | Internal thermistor or external remote CJC |
| Common Mode Rejection | 100dB at 50/60Hz |
| Isolation | 1500V (I/O to logic), 250V (Channel-to-Channel) |
| Power Supply | 115V AC / 125V DC (Nominal) |
| Power Range | 93−132V AC or 105−145V DC |
| Diagnostics | Open wire, Over/Under range, Internal failure |
| Operating Temp | 0°C to 60°C (32°F to 140°F) |
Country of Origin
- Origin: United States (USA)
The Genius I/O product line was primarily developed and manufactured at GE Fanuc’s industrial automation headquarters in Charlottesville, Virginia, USA.
Technical Description & Key Features
The IC660TSA020A utilizes “Smart” technology to ensure measurement integrity in noisy industrial environments:
- Configurable Scaling: Users can choose between Celsius and Fahrenheit scales directly within the block configuration, removing the need for conversion math in the PLC logic.
- Digital Filtering: The module provides selectable input filtering (50Hz or 60Hz rejection) to minimize the impact of ambient electrical noise on temperature readings.
- High-Level Diagnostics: The block reports “Faults” to the controller if a thermocouple breaks or if the internal reference voltage drifts, ensuring that the control system does not act on invalid temperature data.
- Flexible Powering: The module can be powered by either AC or DC sources, making it versatile for different plant power standards.
Product Usage Instructions
1. Mounting and Addressing
- Mount the terminal base on a DIN rail or panel.
- Use a Hand-Held Monitor (IC660HHM501) to set the Block Address (0-31) and configure the baud rate to match the Genius Bus Controller (GBC).
- Set the “Input Type” (e.g., Type K) for each channel individually via software or the HHM.
2. Wiring
- Connect the thermocouple leads to the specified terminals. Ensure correct polarity (negative leads are usually red in ANSI color codes).
- CJC Consideration: For maximum accuracy, ensure the block is mounted away from heat-generating components (like power supplies) that could create a thermal gradient across the terminal strip.
3. Commissioning
- Verify the “Unit OK” LED is solid green.
- Observe the temperature values in the PLC’s %AI (Analog Input) table. If a channel shows a maximum value (e.g., +32767), check for an open-wire condition or incorrect sensor polarity.
Recommended Related GE Models
- GE IC660HHM501: Hand-Held Monitor for local block configuration and troubleshooting.
- GE IC697BEM731: Genius Bus Controller (GBC) for Series 90-70 racks.
- GE IC693BEM331: Genius Bus Controller (GBC) for Series 90-30 racks.
- GE IC660BBA020: Standard Analog Input block for 4−20mA or 0−10V signals.
- GE IC660TBA100: Replacement Terminal Assembly for Thermocouple blocks.
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