Product Core Brief
- Model: CLS208 (typical full part: 208-C10000AA)
- Brand: WATLOW ANAFAZE
- Series: CLS200 Compact Loop System multi-loop thermal controller family
- Core Function: Run 8 fully independent PID heating/cooling regulation loops, store ramp/soak batch recipes, exchange thermal setpoint and fault data via RS232 local setup and RS485 Modbus RTU multi-drop networks for mid-size furnaces, multi-cavity molds and semiconductor thermal process equipment.
- Product Type: 1/8 DIN panel mount multi-loop controller with 32-character vacuum fluorescent display, 8 tactile membrane navigation keys; rear TB18 screw terminal block or 50-pin SCSI expansion terminal board options
- Key Specs: 8 independent PID control loops | 0.334 s loop scan rate | 8 non-volatile batch recipes | Universal thermocouple/RTD/4–20 mA analog input | Dual serial communications | Condition: Refurbished Load-Tested Surplus; ⚠️ EOL — manufacturer discontinued production
- Series positioning breakdown: CLS204 (4-loop fast scan), (8-loop mid-density balance), CLS216 (16-loop high density) — identical 1/8 DIN panel cutout footprint across all variants.
Product Introduction
The WATLOW ANAFAZE integrates eight separate single-loop thermal regulators into one compact 1/8 DIN panel cutout, accepting universal temperature sensor signals to drive SSR or relay outputs for mid-volume multi-zone thermal processing lines. It reduces cabinet wiring clutter and panel space requirements compared to mounting eight discrete single-loop controllers side-by-side.This unit sits between CLS204 (4 fast loops) and CLS216 (16 high-density loops), balancing zone count and system cost for 6–8 zone production equipment. OEM field logging places its rated MTBF at 46,000 operating hours under continuous 24/7 thermal cycling at 40 °C cabinet ambient.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Panel Form Factor | Standard 1/8 DIN panel cutout (96 mm × 48 mm front face) |
| Independent Control Loops | 8 heating/cooling PID loops with auto-tune algorithm |
| Loop Scan Update Rate | 0.334 seconds (3 samples per second) |
| Internal Measurement Resolution | 14-bit analog-to-digital conversion, ±0.1 % full span accuracy |
| Supported Sensor Inputs | J/K/T/E/R/S/N thermocouples; 2/3-wire Pt100 RTD; 4–20 mA / 0–10 V linear analog signals |
| Configurable Output Types | DC SSR drive, mechanical relay alarm/control, 4–20 mA analog retransmit; up to 10 outputs with TB18 terminal board, expandable to 34 via 50-pin SCSI board |
| Non-Volatile Recipe Memory | 8 unique ramp/soak batch profiles stored in EPROM, 10+ year data retention |
| Serial Communication Ports | RS232 (local PC commissioning); RS485 multi-drop Modbus RTU (SCADA/PLC remote access) |
| Front User Interface | Dual-line 32-character vacuum fluorescent display + 8 membrane navigation keys |
| Auxiliary Operating Supply | 100–240 V AC universal mains input, 35 VA steady-state power draw |
| Continuous Operating Ambient Temp | -20 °C to +70 °C full rated control accuracy; linear performance derate above +70 °C |
| Storage / Transport Temperature | -40 °C to +85 °C, non-condensing 5–95 % RH humidity range |
| Built-In Diagnostic Logic | Open/short sensor fault detection, high/low loop deviation alarms, heater load failure monitoring |
| Compliance Certifications | UL, C-UL, CE, RoHS, EN61000 Class A industrial EMC filtering, SEMI S2 cleanroom qualified |
| Net Unit Weight | 490 g; rear mounting depth behind panel cutout 92 mm |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial number against Watlow Anafaze OEM CLS200 part databases; inspect front VFD display for dead segments, membrane keys for sticking, rear TB18 screw terminals or 50-pin SCSI connector pins for oxidation. Photograph rear terminal wiring pinout for field panel installation reference.
- Live Functional Test: Mount controller to test panel paired with 8-channel thermocouple simulator and SSR load banks; run 24 hour cyclic ramp/soak recipe profiles across all eight loops simultaneously. Use a Fluke 115 signal logger to track loop temperature stability and Modbus data transfer consistency.
- Electrical Parameter Test: 500 V Megger insulation test between sensor input circuits and chassis ground (pass threshold >10 MΩ); verify relay output short-circuit protection triggers at 120 % rated contact load without PCB trace burnout.
- Recipe & Communications Verification: Write and read back all 8 batch recipe profiles to validate EPROM memory retention; establish multi-drop Modbus RS485 handshake with industrial SCADA PC, retain full 8-loop configuration tables over a 12 hour mains power-off cycle.
- Final QC & Packaging: Clean rear terminal contact surfaces during refurbishment cycles to remove surface oxidation; fit plastic protective dust cap over front keypad/display, seal unit in anti-static PE foam bag, apply dated QC Pass label listing loop linearity, recipe memory retention, and Modbus throughput test metrics before rigid shock-resistant carton shipping.
Replacement Pitfall Guide
❗ Photograph original recipe ramp/soak parameter values before controller power-down and extraction from the panel cutout.❗ ❗ Modbus RS485 Bus Termination Misconfiguration Risk: Missing or duplicate 120 Ω termination resistors on multi-drop Modbus networks create signal reflection noise that drops remote recipe uploads and causes intermittent loop fault reporting. Only enable termination at the two physical end points of the RS485 trunk cable.❗ Panel Enclosure Condensation Short-Circuit Risk: Cold-stored controllers moved into warm humid production enclosures form PCB trace condensation within two hours. Allow minimum four-hour temperature acclimation before applying 100–240 V AC mains supply to prevent VFD display driver chip corrosion and intermittent loop dropout.❗ ESD Analog Sensor Circuit Damage: Onboard thermocouple/RTD signal op-amp circuits carry low electrostatic discharge tolerance. Always rest the unit on a grounded anti-static mat during rear terminal wiring or cable disconnection, especially in low-humidity dry cleanroom manufacturing environments.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- CLS204 4-loop compact thermal controller → WATLOW ANAFAZE : Needs Adaptation — add four extra sensor input channels to machine wiring harness, expand SCADA Modbus tag mapping to cover eight loop data registers
- CLS216 16-loop high-density thermal controller → WATLOW ANAFAZE : Needs Adaptation — disable eight unused internal loop logic channels inside controller firmware, shrink SCADA tag list to only eight active thermal zones
- VM310 24 V cabinet auxiliary power supply → WATLOW ANAFAZE : Direct — 24 V DC auxiliary rail can power controller via optional external DC supply jumper setting
- CML40.2-SP-330-NA-NNNN-NW Rexroth SERCOS motion PLC → WATLOW ANAFAZE : Direct — Modbus RTU RS485 bus enables bidirectional thermal setpoint and fault data exchange between motion CPU and 8-loop thermal controller
- SE311 Rexroth tightening control Eurocard → WATLOW ANAFAZE : Direct — controller digital alarm relay dry contacts wire directly to SE311 24 V digital input channels for thermal fault production interlock logic
