Fuji Controller PXR4 Manual

The Fuji Controller PXR4 is a high-precision temperature controller designed for industrial applications, featuring PID control, multiple input types (thermocouple, RTD, voltage, current), relay/SSR outputs, dual display with process value and setpoint, auto-tuning function, communication capabilities (RS-485), alarm functions, and power supply of 100-240V AC. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Modes 8. Advanced Functions 9. Maintenance & Care 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Dual LED display, front panel keys, terminal blocks for input/output, communication port, power supply connector.

Feature	Description
Dual display	Shows process value and setpoint simultaneously
PID control	Proportional-Integral-Derivative control algorithm
Input types	Thermocouple (K, J, T, etc.), RTD, voltage, current
Output types	Relay, SSR drive, voltage, current
Auto-tuning	Automatically calculates optimal PID parameters
Communication	RS-485 Modbus RTU protocol
Alarm functions	Up to 4 alarm outputs with various modes
Power supply	100-240V AC, 50/60Hz
Front keys	SET, UP, DOWN, MODE, ALM RESET
Protection rating	IP66 front panel protection

Installation

Unpack and inspect contents. Mount in control panel.

Panel cutout: Prepare 92×92mm cutout in panel.
Mounting: Insert controller from front, secure with mounting brackets.
Wiring: Connect power supply, sensor input, control output, and alarms.
Grounding: Ensure proper grounding for electrical safety.

WARNING! Disconnect power before wiring. Use proper wire gauges and follow local electrical codes.

First-Time Setup

Apply power; configure basic parameters.

Input type setting: Press MODE to access input configuration, select sensor type.
Setpoint adjustment: Use UP/DOWN keys to set desired temperature.
Control parameters: Use auto-tuning or manually set PID values.
Alarm settings: Configure alarm types and setpoints as needed.

CAUTION! Ensure proper sensor connection before power on. Verify wiring before operation.

Specifications

Display: Dual 4-digit LED, red and green
Control accuracy: ±0.3% of span or better
Input types: Thermocouple K, J, T, E, R, S, B; RTD Pt100; DC voltage/current
Control output: Relay (250V AC, 3A), SSR drive (12V DC, 40mA), analog output
Alarm outputs: 4 programmable alarms with relay contacts
Power consumption: 10VA max
Operating temperature: 0 to 50°C (32 to 122°F)
Storage temperature: -20 to 60°C (-4 to 140°F)
Weight: Approx. 400g

Controls and Settings

Front panel keys: SET (parameter setting), UP/DOWN (value adjustment), MODE (mode selection), ALM RESET (alarm reset).

Display: Upper display shows process value (PV), lower display shows setpoint (SV).

Basic settings: Input type, setpoint, control action (heating/cooling), PID parameters. Advanced settings: Alarm types (high, low, deviation), communication address, baud rate, display filter, output limits.

Connecting Devices

Terminal connections: Power supply, sensor input, control output, alarm outputs, communication.

Power supply: Connect L (live) and N (neutral) to appropriate terminals.
Sensor input: Connect thermocouple or RTD wires to input terminals.
Control output: Connect to relay or SSR output terminals.
Communication: Connect RS-485 wires to communication terminals.

Tip: Use shielded cables for sensor inputs and keep away from power lines to prevent noise.

Operation Modes

Supports manual and automatic control modes.

Manual mode: Output level manually adjustable (0-100%).
Automatic mode: PID control maintains setpoint automatically.
Setting mode: Press SET key to enter parameter setting mode.
Normal operation: Upper display shows measured value, lower shows setpoint.
Alarm indication: ALM indicator lights when alarm condition detected.
Output indication: OUT indicator shows control output status.

WARNING! Do not touch live terminals during operation. Allow controller to stabilize after parameter changes.

Advanced Functions

Auto-tuning: Automatically calculates optimal PID parameters. Communication: RS-485 Modbus RTU for remote monitoring/control. Alarm functions: High/low limit, deviation, band alarms.

Maintenance & Care

Disconnect power before maintenance. Clean with dry cloth only; no solvents or abrasives.

CAUTION! Do not use water or chemicals for cleaning. Check terminal tightness periodically.

Regulatory Information

CE compliant: Meets European EMC and LVD directives. UL/cUL approved: Suitable for industrial control applications. Manufactured under ISO 9001 quality system. For technical support, contact Fuji Electric Co., Ltd. or authorized distributors.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Power supply	Check power connection and voltage; verify fuse.
Incorrect reading	Sensor/wiring	Check sensor type setting; verify wiring connections.
No control output	Output configuration	Verify output type setting; check load connection.
Controller oscillates	PID parameters	Run auto-tuning; adjust PID values manually.
Communication failure	Wiring/settings	Check RS-485 wiring; verify address and baud rate.

Reset: Power cycle or use initialization function in advanced settings.

Service: Contact authorized Fuji Electric service center for repairs.