Yokogawa YS1700-120A02 Program Controller — Multi‑segment Ramp/Soak Control for Demanding Process Lines

The Yokogawa YS1700-120A02 is a panel‑mount program controller built for accurate ramp/soak profiling and stable PID control in thermal, chemical, and general industrial processes. From my experience, plants pick the YS1700 when they want repeatable temperature or pressure cycles, clean operator visualization, and long lifecycle support without constantly reworking panel cutouts. It typically suits ovens, kilns, curing lines, and batch reactors where profile accuracy and restart behavior really matter.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery time: 1 week for in‑stock; no more than one month at the latest
• Payment: 50% advance payment; full payment for delivery
• Express delivery methods: FedEx, UPS, DHL

Key Features

• Ramp/Soak Program Control — Create multi‑segment temperature or pressure profiles for batch processes; supports hold, repeat, and power‑fail resume in most configurations.
• Stable PID with Autotuning — Helps dial in loops quickly; typically reduces overshoot and shortens settling time on heat‑only and heat/cool systems.
• Universal Sensor Input — TC, RTD, and DC mV/mA input support so you can standardize on one controller across varied skids.
• Event and Alarm Handling — Drive relays or SSR for end‑of‑segment, deviation alarms, or interlocks; you can map events to program steps.
• Clear Operator Interface — Large, easy‑to‑read front display for PV/SP/MV; operators can start/hold programs and view step status at a glance.
• Panel‑Mount, 1/4 DIN Form Factor — Fits a 92 × 92 mm cutout; you might notice how this simplifies retrofits from older Yokogawa units.
• Optional Communications — RS‑485 (Modbus RTU) is commonly available; useful for data logging and remote profile selection.
• Profile Integrity — Nonvolatile memory retains configuration and stored programs; power‑cycle behavior is predictable in most cases.

Technical Specifications

Brand / Model	(YS1000 series program controller)
HS Code	9032.89 (Automatic regulating or controlling instruments and apparatus)
Power Requirements	Typically 100–240 VAC, 50/60 Hz for YS1700 variants; verify rating on the unit label for -120A02 before energizing
Dimensions & Weight	Front panel 96 × 96 mm (1/4 DIN); panel cutout 92 × 92 mm; depth approx. 150 mm; approx. 1.0 kg
Operating Temperature	0 to 50°C, non‑condensing (typical for YS1000 series)
Signal Input / Output Types	Universal analog input (TC/RTD/DC mV/mA); analog output (e.g., 4–20 mA) and relay/SSR drive outputs depend on option code; -120A02 is commonly supplied with a universal AI and relay outputs
Communication Interfaces	Optional RS‑485 (Modbus RTU) depending on suffix; confirm presence on the nameplate for -120A02
Installation Method	Panel mount with rear screw terminals; includes bezel and gasket for front sealing

Where it typically fits

• Batch ovens and furnaces needing multi‑step temperature profiling (ramp/soak)
• Curing and drying lines where repeat accuracy and event timing are critical
• Reactors requiring staged heating/cooling with interlocked valves or agitators
• Retrofit projects replacing legacy YS series with minimal panel rework

One thing I appreciate is the power‑fail resume behavior: in many cases the YS1700 can pick up the program gracefully after an outage, which is a practical safeguard for 24/7 sites. A maintenance lead at a food processor told us their curing oven cycles stayed within ±0.5°C after switching to YS1700, and operator steps were simpler thanks to clearer event indication.

Related or Supporting Products

• Yokogawa YS1500 — Single‑loop controller (no program function). Ideal if you only need steady PID without ramp/soak.
• Yokogawa UT55A (UTAdvanced series) — Compact universal controller with advanced comms; different form factor but a common upgrade path when panel space is tight.
• Yokogawa UP55A — High‑capacity program controller; more profile flexibility vs. YS1700, but requires different panel cutout and engineering.
• Optional RS‑485/Modbus interface for YS1700 — Enables SCADA/HMI integration and data logging; availability depends on the option code installed.

Installation & Maintenance

• Panel & Environment: Use a 92 × 92 mm cutout with the supplied gasket; keep 50–80 mm clearance behind for wiring and airflow. Avoid high vibration and corrosive gas exposure.
• Wiring: Use shielded twisted pair for low‑level analog signals; earth the shield at one end only. Separate AC power and relay wiring from sensor I/O to minimize noise.
• Ventilation: Provide cabinet ventilation if ambient exceeds 40°C; derating may apply closer to 50°C.
• Programming: Create and store profiles at the unit; where fitted, communications can be used to back up configuration to a PC.
• Safety: Verify power rating on the unit label for -120A02 before energizing. Use proper fusing and an external disconnect. Confirm control action (direct/reverse) and interlocks during commissioning.
• Routine Care: Every 6–12 months, check terminal tightness, clean dust from the bezel, verify sensor calibration, and confirm alarm/event operation. Update documentation when profiles are revised.

Quality & Certifications

• CE marking (EMC and LVD) — typical for Yokogawa YS1000 series
• UL/cUL recognition — model/option dependent
• RoHS compliance
• Manufactured under ISO 9001 quality systems
• Warranty: 365 days (our supply)

If you’d like, share your required I/O mix and whether RS‑485 is needed. We’ll confirm the exact -120A02 build, match it to your sensor/actuator set, and ship within the stated lead time.