Description
For highly precise thermal monitoring within automated industrial environments, the AJ65BT-64RD3 serves as an industrial-grade platinum resistance temperature detector (RTD) input module. This remote device station interfaces directly with CC-Link networks, allowing seamless integration of temperature sensor telemetry into central PLC and DCS systems.
The module supports four independent 3-wire RTD input channels compatible with standard Pt100 and JPt100 sensors. It translates raw analog sensor signals into either 16-bit or high-resolution 32-bit signed binary values, ensuring precise digital conversion. Electrical isolation via internal photocouplers isolates the sensor input circuitry from the CC-Link communication line, safeguarding the network from common-mode voltage spikes and electromagnetic noise.
Features
- Supports up to 4 independent 3-wire RTD channels (Pt100 and JPt100 compatibility).
- Fast conversion speed of 40 ms per channel for real-time monitoring.
- Flexible digital output configuration with 16-bit or 32-bit signed binary modes.
- High-integrity photocoupler isolation between the sensor inputs and the CC-Link transmission system.
- Removable 2-piece terminal block interfaces (7-point and 27-point M3.5 screw terminals) to simplify field wiring and module replacement.
Applications
- Thermal monitoring of industrial furnaces and ovens.
- Chemical and petrochemical process temperature tracking.
- HVAC, refrigeration, and cooling system management.
- Power generation plant turbine and bearing temperature diagnostics.
Technical Specifications
| Manufacturer |
Mitsubishi Electric |
| Part Number / Model |
AJ65BT-64RD3 |
| Module Type |
CC-Link RTD Temperature Input Unit |
| Number of Channels |
4 |
| Compatible Sensors |
Pt100, JPt100 (3-wire type) |
| Measurement Range |
-180 to 600 degC (both Pt100 and JPt100) |
| Resolution |
0.025 degC |
| Sensor Output Current |
1 mA |
| Accuracy (25 degC +/- 5 degC) |
+/- 0.1% of full scale |
| Accuracy (0 to 55 degC) |
+/- 0.25% of full scale |
| Conversion Speed |
40 ms / channel |
| CC-Link Station Type |
Remote Device Station (Ver.1, occupies 4 stations) |
| Isolation Method |
Photocoupler isolation (between inputs and CC-Link line; non-isolated between channels) |
| Withstand Voltage |
500 VAC for 1 minute (between power, communication, input, and ground terminals) |
| Insulation Resistance |
10 MOhm or more (at 500 VDC) |
| Power Requirements |
24 VDC (18 to 30 VDC allowable), 0.17 A |
| Terminal Connection Type |
7-point terminal block (M3.5 screws) for power and CC-Link; 27-point terminal block (M3.5 screws) for sensor I/O |
| Operating Temperature |
0 to 55 degC |
| Storage Temperature |
-20 to 75 degC |
| Ambient Humidity |
10 to 90% RH (non-condensing) |
| Dimensions (H x W x D) |
65 mm x 151.9 mm x 63 mm |
| Weight |
0.38 kg (Shipping Weight: 1.4 kg) |
Installation Guidelines
- Install the module inside a clean, dust-free industrial control cabinet rated for IP54 or higher.
- Ensure the system is completely powered down before connecting or disconnecting the CC-Link cable and RTD wiring.
- Utilize CC-Link dedicated cabling to ensure signal integrity across the fieldbus network.
- Ground the shielded wire of the CC-Link cable and connect the module's ground terminal to a low-impedance ground point.
- Maintain a minimum clearance around the module to allow proper heat dissipation.