Watlow 997D-11CC-JURG

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