Product Overview
The Yokogawa ASR133 measures temperature and resistance signals from RTD and potentiometer sensors. This module provides 8 isolated input channels for precise resistance-based measurements. It converts resistance values into digital data for the control system. The unit integrates seamlessly into Yokogawa CENTUM and ProSafe-RS platforms.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | ASR133 |
| Product Type | RTD/POT Input Module |
| Number of Inputs | 8 isolated channels |
| RTD Types | Pt100, Pt50, Ni100, Ni120 |
| Potentiometer Range | 0–100 Ω, 0–500 Ω, 0–2000 Ω |
| Connection Type | 3-wire or 4-wire RTD, 3-wire potentiometer |
| Resolution | 16 bits |
| Accuracy | ±0.05% of span at 25°C |
| Temperature Drift | ±25 ppm/°C |
| Excitation Current | 1 mA constant current source |
| Input Protection | Overvoltage up to 30 VDC |
| Power Dissipation | 3.5 W typical |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | –40°C to 85°C |
| Humidity Range | 5% to 95% non-condensing |
Physical Dimensions and Mounting
This module measures 130 mm in height, 30 mm in width, and 100 mm in depth. The unit weighs approximately 0.30 kg. It mounts directly onto a DIN rail within the system cabinet. The front panel includes 8 LED indicators for channel status. These LEDs show active measurements and fault conditions clearly.
Electrical Interface and Sensor Wiring
A 37-pin D-sub connector provides the primary interface for all sensor wiring connections. The module supports 3-wire and 4-wire RTD configurations for lead compensation. It also accepts 3-wire potentiometer connections for position or level sensing. Each channel includes a 1 mA constant current excitation source. The excitation current minimizes self-heating errors in temperature measurements. RTD sensors like Pt100 and Ni120 connect directly to these terminals.
Performance and Measurement Precision
The ASR133 delivers 16-bit resolution for accurate resistance-to-digital conversion. It compensates for lead wire resistance automatically in 4-wire configurations. The module samples each channel at 10 times per second for responsive monitoring. It rejects 50 Hz and 60 Hz noise effectively. Furthermore, the module performs continuous diagnostics for open-circuit and short-circuit detection. It reports any sensor faults to the main controller immediately.
Installation and System Integration
You can install this module in any available slot within the Yokogawa CENTUM chassis. The backplane automatically handles address assignment and power distribution. Always configure the sensor type using the system engineering software. For critical temperature loops, implement redundant modules for failover protection. Verify the wiring configuration matches your sensor specifications.
Environmental Compliance and Certification
This module carries CE marking and UL recognition for industrial applications. It also complies with RoHS and WEEE environmental directives. The conformal coating protects the PCB against moisture and dust ingress. This coating ensures long-term reliability in demanding plant conditions.
Details
| Weight | 0.4 kg |
|---|---|
| Dimensions | 130 × 40 × 120 mm |
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