Configured for high-performance process regulation, the Yokogawa YS1700 S2 (YS1700 Programmable Single-Loop Controller) provides direct physical/electrical execution of PID-based control strategies and complex sequence logic within industrial process environments.

Suffix Breakdown & Model Matrix

• YS1700: Base model series for programmable single-loop controllers.
• S2: Revision identifier denoting upgraded CPU processing capacity and enhanced terminal interface compatibility.

Hardware Specifications

Process Control and Signal Isolation Integrity

The YS1700 S2 architecture integrates seamlessly into DCS instrumentation layers, supporting the 4-20 mA HART loop protocol for precision transmitter interfacing. To ensure process stability, the unit features channel-to-channel isolation on analog interfaces, preventing ground-loop interference from compromising control variable accuracy. When interfacing with thermocouple or resistance temperature detectors, the controller utilizes cold junction compensation (CJC) within the I/O processing stage, ensuring that temperature-dependent signals remain accurate across the full range of ambient operating conditions. The dual-CPU configuration provides redundant computational paths, supporting fail-safe state execution during internal processor interrupts or bus communication failures.

Frequently Asked Questions

Q: Does the YS1700 S2 support hot-swapping during active operation?

A: No. The controller is designed for fixed panel mounting. Power must be isolated at the rear terminal block before withdrawing the module from the housing to prevent damage to the backplane communication pins.

Q: Is the YS1700 S2 compatible with existing YS100 series programming tools?

A: Yes, but specific software updates may be required to utilize the expanded function block library (400 modules) and the increased text-based programming steps (1000 steps) unique to the S2 revision.

Field Installation Guidelines

• Mounting: Ensure the panel cutout is precisely 92 mm x 92 mm. Use the provided mounting brackets to ensure a watertight seal for the IP54-rated front panel.
• Wiring: Maintain strict separation between analog signal wiring and high-current AC power cables. Use shielded, twisted-pair cabling for all AI and AO connections to mitigate electromagnetic interference.
• Grounding: Connect the designated ground terminal to a low-impedance cabinet ground bus. This is mandatory for maintaining the noise immunity levels required for sensitive PID control loops.
• Environmental: Avoid installation in areas with extreme vibration or direct solar exposure. While the display is sunlight-readable, excessive heat can reduce the service life of the TFT LCD backlight.