Watlow 997D-11CC-JURG

Model Series: EZ-ZONE PM 997D Series

Product Introduction:
The Watlow 997D-11CC-JURG is a DIN-rail-mountable PID temperature controller with dual relay outputs and universal input capability. It is designed for industrial oven, furnace, and process heating applications requiring precise temperature control with alarms and event logging.

Category:
Description

Technical Specifications:

  • Part Number: 997D-11CC-JURG
  • Input Type: Universal — Thermocouple (J, K, T, E, N, R, S, B) / RTD (Pt100, Pt1000, Cu10, Cu100) / mV / Ω / 4–20 mA / 0–10 V
  • Control Output: Dual relay — 5 A @ 250 VAC resistive (SPDT each)
  • Alarm Output: 1 additional relay — 5 A @ 250 VAC (SPDT)
  • Power Supply: 85–264 VAC / 90–300 VDC / 24 VDC (auto-ranging)
  • Accuracy: ±0.1% of reading + 1°C (thermocouple) / ±0.05% + 0.5°C (RTD)
  • Resolution: 0.1°C / 0.1°F
  • Control Mode: PID with auto-tune
  • Sampling Rate: 250 ms
  • Operating Temperature: 0°C to +55°C (32°F to +131°F)
  • Enclosure Rating: NEMA 1 / IP20 (front panel)
  • Dimensions: 96 mm × 96 mm × 110 mm (DIN rail mount)
  • Communication: RS-485 Modbus RTU (optional module)

Functional Features:

  • Auto-tune PID with manual override
  • Event logging: up to 100 events with timestamps
  • Programmable alarm setpoints (high, low, deviation, rate-of-change)
  • Dual setpoint with ramp/soak profile capability
  • 6-digit LED display (red, 14 mm)

Performance Parameters:

  • Control Cycle: 250 ms
  • Alarm Accuracy: ±1°C or ±1% of setpoint
  • Relay Life: 100,000 operations (mechanical) / 1,000,000 operations (solid-state option)
  • Isolation: 1,500 VAC between input, output, and power

Structural Features:

  • 96 × 96 mm DIN rail clip-on enclosure
  • Screw-terminal blocks for all connections (pluggable)
  • Front panel: 4 push buttons + LED display
  • IP20 front panel rating (panel-mount use)

Working Principle:
The universal input module digitizes the sensor signal and applies a PID algorithm to compute the required control output. The dual relays switch heating elements on/off or modulate via time-proportioning. The alarm relay activates when temperature exceeds programmable thresholds.

Key Advantages:

  • Universal input eliminates need for separate transmitter
  • Auto-tune simplifies commissioning
  • Event logging aids troubleshooting
  • Dual relay output allows primary + backup heating control
  • DIN rail mount saves panel space

Applicable Industries: Oven and furnace control, plastic injection molding, food processing, pharmaceutical, packaging, laboratory equipment

Installation Requirements:

  • DIN rail: 35 mm top-hat rail, EN 50022
  • Wire gauge: 18–12 AWG for relay outputs, 24–18 AWG for input
  • Sensor wire must be shielded and grounded at controller end only
  • Mount in enclosure with adequate ventilation (min. 50 mm clearance above)

Usage Notes:

  • Run auto-tune with actual load connected for best results
  • Verify input type matches sensor before powering on
  • Do not exceed 5 A per relay contact
  • Update firmware via Watlow WCT software for latest features
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