YOKOGAWA YS1700-121/A06
Product Introduction:
The YS1700-121/A06 is a single-loop programmable controller from Yokogawa’s YS1700 series. It features a universal input that accepts thermocouple, RTD, voltage, current, and frequency signals. The /A06 suffix denotes a specific faceplate configuration and output type. The YS1700 is designed for compact 1/4 DIN panel mounting and provides PID control with advanced algorithms.
Detailed content
Technical Specifications:
- Controller Type: Single-loop PID controller
- Input Type: Universal (TC Type J, K, T, E, B, R, S, L, N, W / RTD Pt100, JPt100, Cu50 / DC Voltage 0–5V, 1–5V, 0–10V / DC Current 4–20mA, 0–20mA / Frequency 0–1kHz)
- Control Output: Relay output (2 SPDT relays) + 4–20mA DC output (optional)
- Alarm Output: 2 alarm outputs (HIGH, LOW, DEVIATION, BAND)
- Display: 5-digit, 7-segment red LED (main value) + 4-digit green LED (setpoint)
- Control Modes: PID, ON/OFF, 2-Position, Heating/Cooling PID
- Scan Rate: 250 ms (0.25 second)
- Power Supply: 100–240 VAC, 50/60 Hz / 24 VDC (dual supply capable)
- Power Consumption: Maximum 5 VA
- Operating Temperature: -10 to +55 °C (14 to 131 °F)
- Protection Rating: Front panel IP66 / NEMA4X
- Dimensions: 48 mm (W) × 96 mm (H) × 106 mm (D) (1/4 DIN: 45 × 90 mm cutout)
- Weight: Approximately 0.35 kg
Functional Features:
- Auto-tuning function (relay method + PID method) for rapid commissioning
- Built-in 32 segment program pattern for ramp/soak control
- SV ramp function (soft start/stop for setpoint changes)
- Manual/Auto/Cascade control modes
- Heating/Cooling control with differential gap
- Remote setpoint input (analog or digital)
- Communication: RS-485 (Modbus RTU) — optional module
Performance Parameters:
- Control Accuracy (PID): ±0.2% of full scale (F.S.) or ±1 digit (whichever is greater)
- Repeatability: ±0.1% of F.S.
- Alarm Accuracy: ±0.5% of F.S.
- Output Accuracy (4–20mA): ±0.2% of span
Structural Features:
- Housing: Flame-retardant polycarbonate front, ABS rear housing (UL94 V-0)
- Terminal Block: Screw terminal, wire size 0.5–2.5 mm² (AWG 20–14)
- Mounting: 1/4 DIN panel clip or DIN rail (35 mm)
- Front Panel: Snap-on, gasket-sealed for IP66 protection
Applicable Industries:
- HVAC — Temperature control in air handling units
- Food Processing — Oven and fryer temperature control
- Plastics & Rubber — Extruder and mold temperature control
- Water Treatment — Tank level and temperature control
- General Manufacturing — OEM machine integration
Installation Requirements:
- Panel cutout: 45 mm (W) × 90 mm (H) for 1/4 DIN mounting
- Use shielded cable for all input signals
- Ground the shield at one end only (controller end recommended)
- For TC inputs, use correct thermocouple extension wire type matching the TC type
- For RTD inputs, use 3-wire configuration for best accuracy
Precautions:
- Do not apply voltage exceeding 30 VDC or 250 VAC between terminals
- Ensure input signal does not exceed rated input range (overrange will cause inaccurate reading)
- Do not disassemble the front panel — IP66 seal will be voided
- Allow 30 minutes warm-up after power-on for stable readings












