Description
The Watlow Anafaze 16CLSCAS (part of the Watlow Anafaze CAS / CLS200 Series) is a high-density, multi-loop temperature and process controller designed for precise multi-zone thermal applications. Originally developed by Anafaze (later integrated into Watlow Electric Manufacturing Company), the 16CLSCAS provides up to 16 independent channels of PID control, sensor monitoring, and alarm monitoring in a single compact package. It is widely used in plastics extrusion, thermoforming, multi-zone industrial ovens, composite curing, and semiconductor manufacturing equipment.
Key Specifications & Identification
| Attribute | Details |
| Manufacturer | Watlow Electric Manufacturing Company (Watlow Anafaze) |
| Model / Series | 16CLSCAS / CAS Series (CLS Compact System Platform) |
| Control Channels | 16 Independent Loops (PID or On/Off Control) |
| Input Sensor Types | Thermocouples (J, K, T, E, R, S, B, N), RTD (100\Omega Platinum), linear DC mV/mA/V |
| Output Types | Switched DC (SSR drive), electromechanical relays, linear analog (4–20 mA / 0–10 V DC) |
| Serial Communication | RS-232 / RS-485 (Supports Modbus RTU & Anafaze protocol) |
| Display / User Interface | Backlit LCD readout with membrane keypad for parameter setup and zone monitoring |
| Operating Power | 100–240 V AC (50/60 Hz) or 24 V DC power options |
Primary System Functions
- High-Density Multi-Zone Control: Consolidates 16 individual single-loop controllers into a single compact housing, reducing control panel footprint and wiring complexity across multi-zone thermal systems.
- Auto-Tuning PID Control: Features independent auto-tuning algorithms per channel to automatically calculate optimum Proportional, Integral, and Derivative values for heating/cooling processes.
- Flexible Alarm Monitoring: Includes high/low process alarms, deviation alarms, and heater-break diagnostic alarms per loop, with configurable relay outputs for interlock signaling.
- Serial Network Integration: Enables remote monitoring, data logging, and setpoint adjustment from plant SCADA systems, PLCs, or operator panels via RS-485 Modbus RTU communications.
Servicing & Installation Guidelines
- Sensor Wiring & Polarity Integrity: Ensure thermocouple lead wires match the specific calibration type (e.g., Type K) and maintain correct polarity across all 16 input terminal blocks to prevent inverted temperature readings.
- Noise Suppression & Shielding: Run low-voltage sensor input wiring in dedicated grounded conduit away from high-voltage AC motor drives, heating element cables, and heavy inductors to minimize signal jitter.
- Power Supply Disconnect Safety: Isolate main control cabinet power before landing field connections or servicing internal output modules to avoid shock hazards or short-circuiting output transistors.
- Configuration & Parameter Backup: Document or upload setting profiles (setpoints, tuning constants, alarm thresholds) using Watlow configuration software prior to swapping units or upgrading firmware.
