Fuji Electric Temperature Controller PXR4 Manual

The Fuji Electric PXR4 is a high-performance digital temperature controller featuring advanced PID control, universal input compatibility, dual digital displays, relay/SSR outputs, communication capabilities, and user-friendly operation. Designed for precise temperature regulation in industrial applications with robust construction and comprehensive functionality. 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. Wiring Connections 7. Operation Modes 8. Advanced Functions 9. Maintenance & Care 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Dual digital displays, front panel controls, universal input terminals, output relays, communication ports, and mounting hardware.

Feature	Description
Dual displays	PV (process value) and SV (set value) simultaneous display
Universal input	Compatible with thermocouples, RTDs, and voltage/current inputs
PID control	Advanced PID algorithm with auto-tuning capability
Output types	Relay, SSR drive, voltage pulse, and current outputs
Communication	RS-485 Modbus RTU communication support
Alarm functions	Multiple alarm outputs with adjustable hysteresis
Power supply	100-240V AC, 50/60Hz universal input
Front panel	IP66 rated for dust and water protection
Mounting	DIN rail or panel mounting options
Memory backup	Non-volatile memory for parameter storage

Installation

Unpack and inspect contents. Ensure proper mounting location.

Mounting: Install on DIN rail or panel using provided hardware.
Power connection: Connect AC power to L and N terminals.
Sensor connection: Wire temperature sensor to input terminals according to type.
Output connection: Connect control output to heater/load device.
Alarm connection: Wire alarm outputs to external indicators or controls.

WARNING! Disconnect power before wiring. Ensure proper grounding for safety.

First-Time Setup

Apply power; configure basic parameters.

Input type selection: Set input type matching your temperature sensor.
Setpoint adjustment: Use front panel keys to set desired temperature.
PID tuning: Enable auto-tuning for optimal control performance.
Alarm settings: Configure alarm types and setpoints as required.
Communication setup: Configure address and parameters if using Modbus.

CAUTION! Verify sensor type before power on to prevent damage.

Specifications

Display: Dual 4-digit LED displays
Input types: Thermocouples (K, J, R, S, B, E, N, T), RTD (Pt100), DC voltage/current
Control accuracy: ±0.3% of span ±1 digit
Control output: Relay, SSR, voltage pulse, current (4-20mA)
Alarm outputs: 2 points (relay or transistor)
Power supply: 100-240V AC, 50/60Hz
Ambient temperature: 0 to 55°C operating
Protection rating: IP66 front panel
Communication: RS-485 Modbus RTU
Dimensions: 48x48mm panel cutout

Controls and Settings

Front panel: PV/SV displays, SET key, UP/DOWN keys, MODE key.

Parameter access: Press MODE key to enter parameter setting mode.

Basic parameters: Input type (IN-T), control action (P, I, D values), alarm types (AL1, AL2), setpoint (SV). Advanced parameters: Communication address (Addr), baud rate (bAud), control period (CtL), input shift (InS), output limit (oUL).

Wiring Connections

Terminal assignments: Power (L, N), input (+, -), control output (OUT, COM), alarm outputs (AL1, AL2, COM), communication (S+, S-).

Disconnect power before wiring.
Use proper wire gauge for current requirements.
Follow terminal designations precisely.
Ensure secure connections and proper strain relief.
Verify sensor polarity for thermocouples and RTDs.

Tip: Use shielded cables for sensor inputs in noisy environments.

Operation Modes

Supports automatic control, manual mode, and standby operation.

Automatic control: Normal PID control operation.
Manual mode: Manual output percentage control.
Standby: Output disabled while maintaining settings.
Setpoint ramp: Programmable ramp to setpoint.
Soak control: Maintain setpoint for specified time.
Communication control: Remote operation via Modbus.

WARNING! Do not change modes during critical processes.

Advanced Functions

PID auto-tuning: Automatically calculates optimal P, I, D parameters. Communication: Modbus RTU protocol for remote monitoring/control. Program control: Multi-segment profile operation. Password protection: Parameter access restriction.

Maintenance & Care

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

CAUTION! Do not use compressed air for cleaning; may damage internal components.

Regulatory Information

CE compliant: Meets European EMC and low voltage directives. UL/cUL recognized: Component recognition for North America. RoHS compliant: Meets restriction of hazardous substances. Copyright © Fuji Electric Co., Ltd. For technical support, contact local Fuji Electric distributor or visit www.fujielectric.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Power supply	Check power connection and voltage; verify fuse.
Incorrect temperature	Sensor/wiring	Verify sensor type setting; check wiring and connections.
No control output	Settings/wiring	Check output configuration; verify load connections.
Unstable control	PID tuning	Perform auto-tuning; adjust PID parameters manually.
Communication failure	Wiring/settings	Verify cable connections; check address and baud rate.

Reset: Initialize parameters if configuration errors occur.

Service: Contact authorized Fuji Electric service center for repairs.