The Siemens 15738-119 digital single-loop controller provides high-precision PID regulation for industrial processes. This panel-mount device manages one control loop with exceptional accuracy and stability. The controller combines universal inputs, flexible outputs, and an intuitive user interface.
Technical Specifications
| Parameter | Specification |
|---|---|
| Control Type | Digital PID (single loop) |
| Panel Cutout | 96 x 96 mm (square) |
| Dimensions (W x H x D) | 96 x 96 x 120 mm |
| Weight | 0.5 kg |
| Input Types | Thermocouple (J/K/T), RTD (Pt100), 0-20mA, 0-10V |
| Output Types | 4-20mA, 0-10V, relay (2A/250V AC) |
| Analog Inputs | 1 x universal (configurable) |
| Analog Outputs | 1 x 4-20mA (control signal) |
| Digital Inputs | 2 x 24V DC (for external setpoint switching) |
| Relay Outputs | 2 x form C (alarm/control) |
| Accuracy | ±0.1% of span |
| Sampling Rate | 10 Hz (100 ms cycle) |
| PID Parameters | P: 0-999.9%, I: 0-999.9s, D: 0-999.9s |
| Autotune Function | Yes (built-in) |
| Display | 2 x 4-digit LED (red/green) |
| Memory | 2 KB EEPROM (parameter storage) |
| Internal Component Count | 1 x 16-bit ADC, 1 x microprocessor, 3 x optocouplers |
| Power Supply | 90-264V AC (47-63 Hz) or 24V DC |
| Operating Temperature | 0°C to +55°C |
| Protection Class | IP66 (front panel), IP20 (rear) |
Universal Input and Flexible Output Configuration
The Siemens 15738-119 accepts thermocouple, RTD, or analog signals through its universal input. Users can select J, K, or T thermocouple types or Pt100 RTDs for temperature measurement. The controller also handles 0-20mA and 0-10V signals from pressure and flow transmitters. One 4-20mA output provides the primary control signal to actuators and valves.
Advanced PID Tuning and Autotune Capability
Built-in autotune identifies optimal PID parameters through a simple startup procedure. The controller then applies P, I, and D values across ranges up to 999.9% for proportional gain. Integral action from 0 to 999.9 seconds eliminates steady-state errors. Derivative action between 0 and 999.9 seconds anticipates process changes and reduces overshoot.
Reliable Alarm and Digital I/O Management
Two form C relay outputs function as high/low alarms or secondary control contacts. Each relay switches loads up to 2A at 250V AC for direct actuator control. Two 24V DC inputs enable external setpoint switching or remote start/stop functions. Optocouplers isolate these digital inputs from the main control circuitry.
Intuitive Dual Display and Parameter Storage
A dual LED display shows process value in red and setpoint in green simultaneously. This configuration allows operators to monitor both variables without switching screens. Internal 2 KB EEPROM retains all parameters even during prolonged power outages. Users can store up to 16 complete parameter sets for different product recipes.
Compact Panel Mount and Robust Enclosure
The 96x96mm front panel fits standard DIN cutouts with a depth of 120mm behind the panel. This controller weighs only 0.5 kg and mounts securely with two spring clips. The IP66-rated front withstands washdowns, dust, and typical industrial spills. Rear terminals accept wires from 0.5mm² to 2.5mm² for reliable field connections.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 50 × 290 × 217 mm |
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