Product Core Brief
- Model: 997D-11CC-JURG
- Brand: WATLOW (Anafaze 997D dual-loop controller series)
- Series: 997D compact dual-channel industrial PID temperature controller family
- Core Function: Run two fully isolated independent PID thermal control loops with TRU-TUNE+ auto-tuning, process multi-type temperature sensor signals, drive heater SSR/relay outputs, and exchange thermal setpoint/alarm data via RS485 Modbus RTU to PLC and SCADA systems.
- Product Type: 1/4 DIN panel mount dual-loop temperature controller, NEMA4X front membrane keypad, rear screw terminal I/O, JURG suffix = OEM custom thermal profile firmware for semiconductor bake processing
- Key Specs: Two galvanically isolated PID loops | Universal thermocouple/RTD/4–20 mA analog input | TRU-TUNE+ adaptive auto-tune | RS485 Modbus RTU | 24 V AC/DC universal auxiliary supply | Condition: Refurbished Load-Tested Surplus
- Suffix breakdown: 11 = dual relay + dual SSR output mix; CC = channel-channel galvanic isolation; JURG = factory custom baked wafer thermal ramp/soak firmware variant
Product Introduction
The WATLOW 997D-11CC-JURG consolidates two single-loop thermal controllers into a single 1/4 DIN panel cutout, delivering independent heating/cooling regulation for dual-zone vacuum bake chambers, gas line trace heating, and semiconductor pedestal wafer temperature control. It eliminates redundant panel wiring and cabinet space versus discrete single-loop controllers.This unit differentiates from standard 997D base variants by carrying JURG custom preloaded firmware optimized for low-gradient wafer thermal ramp profiles, plus full channel-to-channel galvanic isolation to suppress high-frequency plasma equipment electrical noise. OEM field logging records its rated MTBF at 47,000 operating hours under continuous 24/7 cleanroom runtime at 40 °C ambient.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Panel Mount Form Factor | Standard 1/4 DIN cutout, NEMA4X splash/dust resistant front panel |
| Number of Control Loops | 2 fully independent, galvanically isolated PID loops |
| Loop Scan Update Rate | 0.5 seconds per channel simultaneous sampling |
| Supported Sensor Inputs | J/K/T/E/R/S/N thermocouples; 2/3-wire Pt100 RTD; 4–20 mA / 0–10 V linear analog |
| Control Algorithms | TRU-TUNE+ adaptive auto-tune PID, manual P/I/D gain adjustment, ramp/soak sequencing |
| Output Configuration (11CC) | 2 mechanical relay alarm outputs; 2 DC SSR drive heating outputs per unit |
| Serial Communication Interface | RS485 multi-drop Modbus RTU, 9600–38400 baud rate adjustable |
| Front User Interface | Dual 4-digit red LED process/setpoint displays, 4 tactile membrane navigation keys |
| Auxiliary Operating Supply | 24 V AC / DC universal input ±10 %, 28 VA steady-state power draw |
| Continuous Operating Ambient Temp | 0 °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 Circuits | Open/short sensor break detection, loop deviation high/low alarm, heater load failure monitoring |
| Isolation Rating | 500 V AC channel-to-channel and input-to-output galvanic isolation |
| Compliance Certifications | UL, C-UL, CE, RoHS, EN61000 Class A industrial EMC filtering, SEMI S2 cleanroom qualified |
| Net Unit Weight | 560 g; rear panel mounting depth 65 mm |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial number against Watlow Anafaze OEM 997D series databases; inspect front LED displays for dead digit segments, membrane keys for sticking, rear screw terminal blocks for corrosion. Photograph rear I/O terminal pinout for field panel wiring reference.
- Live Functional Test: Mount controller to test panel paired with dual-channel thermocouple simulator and SSR heater load banks; run 24 hour cyclic ramp/soak thermal profiles across both isolated loops simultaneously. Use a Fluke 115 signal logger to track loop temperature stability and Modbus RTU data transfer latency consistency.
- Electrical Parameter Test: 500 V Megger insulation test between each sensor input circuit and chassis ground (pass threshold >10 MΩ); verify relay output short-circuit protection triggers at 110 % rated contact load without PCB trace burnout.
- Firmware & Comms Verification: Confirm preloaded JURG custom thermal profile firmware via Modbus read registers; upload and store dedicated wafer batch ramp recipes to non-volatile memory, retain full loop configuration tables over a 12 hour 24 V supply power-off cycle to validate flash memory retention.
- Final QC & Packaging: Clean rear screw terminal contact surfaces during refurbishment cycles to remove oxidation; fit plastic protective dust cap over front LED/keypad assembly, seal unit in anti-static PE foam bag, apply dated QC Pass label listing loop linearity, isolation resistance, Modbus throughput, and custom firmware integrity test metrics before rigid anti-shock carton shipping.
Replacement Pitfall Guide
❗ Standard / JURG Custom Firmware Mismatch Risk: Generic unmodified 997D-11CC controllers lack the JURG wafer bake low-gradient ramp profile logic. Direct substitution creates fast thermal overshoot that damages silicon wafers and triggers production batch scrap. Match full 997D-11CC-JURG part number for semiconductor thermal processing equipment only. Photograph original ramp/soak recipe parameter values before controller power-down and extraction from the panel cutout.❗ RS485 Modbus 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.❗ Unshielded Sensor Cable Cross-Talk Hazard: Unshielded thermocouple/RTD wiring run parallel to high-current SSR heater power cabling introduces temperature measurement noise and unstable PID output cycling. Separate low-level sensor harnesses from heater power looms by a minimum 50 mm inside cabinet cable trays.❗ Panel Enclosure Condensation Short-Circuit Risk: Cold-stored controllers moved into warm humid cleanroom enclosures form PCB trace condensation within two hours. Allow minimum four-hour temperature acclimation before applying 24 V AC/DC auxiliary supply to prevent LED 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 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
- Standard 997D-11CC generic dual-loop controller → WATLOW 997D-11CC-JURG : Needs Adaptation — reconfigure motion PLC thermal interlock logic to match JURG custom slow ramp profile alarm thresholds
- VM310 multi-channel cabinet auxiliary power supply → WATLOW 997D-11CC-JURG : Direct — regulated 24 V DC auxiliary rail matches controller universal supply input requirements without voltage conditioning
- CML40.2-SP-330-NA-NNNN-NW Rexroth SERCOS motion PLC → WATLOW 997D-11CC-JURG : Direct — RS485 Modbus RTU bus enables bidirectional thermal setpoint and wafer bake fault data exchange between motion CPU and dual-loop thermal controller
- SE311 Rexroth tightening control Eurocard → WATLOW 997D-11CC-JURG : Direct — controller digital alarm relay dry contacts wire directly to SE311 24 V digital input channels for thermal fault production interlock logic
