Name: Omron CJ1W-PH41U CJ-Series Process Analog I/O Unit - INOSAKI
SKU: Omron-CJ1W-PH41U
Price: 632.62 USD
Availability: InStock

Technical Overview

The Omron CJ1W-PH41U is an isolated-type universal process analog input module designed for SYSMAC CJ1-series programmable logic controllers. It features four independent, highly-isolated channels capable of accepting a versatile mix of inputs, including platinum resistance thermometers (RTD), thermocouples, and standard DC voltage or current signals. With high-speed conversion and a high-resolution ADC (up to 1/256,000), it delivers precise scaled values to the CPU in a compact DIN-rail mountable footprint. Galvanic isolation prevents unwanted ground loops and cross-channel interference, making it ideal for robust industrial process control.

Key Features

4fullyisolatedanaloginputchannelswithindividualchannelconfiguration[1.1].
Universal signal compatibility: RTD, Thermocouple, DC Voltage, and DC Current.
High-resolution Analog-to-Digital Conversion (up to 1/256,000).
High-speed conversion (down to 10 ms for 2 inputs or 60 ms/ch) for critical telemetry.
Built-in process value alarms (LL, L, H, HH) and rate-of-change alerts.
Channel-to-channel isolation (500 VAC) prevents unwanted current paths and ground loops.
Programmable process value clamping (maximum/minimum) when sensor input errors are detected.

Technical Specification Matrix

Parameter	Value
Input Channels	4 (Isolated Universal Inputs)
Supported RTD Types	Pt100, JPt100, Pt1000 (3-wire/4-wire)
Supported Thermocouple Types	K, J, T, E, L, U, N, R, S, B, WRe5-26, PLII
Supported DC Current	4-20 mA, 0-20 mA
Supported DC Voltage	1-5 V, 0-5 V, 0-10 V, 0-1.25 V, ±100 mV, ±1.25 V, ±5 V, ±10 V
Conversion Speed	10 ms to 250 ms (Depending on channel count and resolution)
Maximum Resolution	Up to 1/256,000
Measurement Accuracy	±0.05% to ±0.3% of F.S. (Depends on input type)
Isolation	500 VAC for 1 min (Between all input channels)
Current Consumption	320 mA max at 5 VDC
Operating Temperature	0°C to 55°C
Dimensions	90 mm x 31 mm x 65 mm
Weight	150 g max
Ingress Protection	IP20
Mounting Type	DIN Rail via CJ Series Backplane

Industrial Applications

1. Chemical Reactor Temperature Profiling

Monitoring highly sensitive exothermic chemical reactions requires precision temperature tracking across multiple points using different sensor types simultaneously to ensure process stability.

Problem Solved

The CJ1W-PH41U provides four fully isolated inputs, allowing simultaneous connection of high-accuracy RTDs (Pt100) and multi-range thermocouples without ground loop interference, resolving common mode voltage errors often found in complex, heavily instrumented reactor tanks.

Exothermic Reaction MonitoringIsolated Analog InputsGround Loop PreventionRTD Pt100Thermocouple Multiplexing

2. Multi-Zone Heat Treatment Furnace Control

Industrial furnaces used for metallurgy demand tight regulation of heat across varying thermal gradients and extreme temperature ranges to guarantee proper material tempering.

Problem Solved

By accommodating high-temperature Type R, S, and B thermocouples alongside standard instrumentation signals, this unit's 500 VAC channel isolation and high-resolution (1/256,000) ADC feed ultra-precise thermal data directly to the PLC's PID loops, preventing over-curing or thermal stress.

Heat Treatment FurnaceType B/R/S Thermocouples1/256000 Resolution ADCPID Control LoopThermal Gradient Regulation

3. Hydraulic System Pressure & Flow Transients Tracking

Large-scale hydraulic test stands and automated pressing machines require the exact reading of hydraulic pressure transients and fluid flow variations to protect mechanical components and ensure quality.

Problem Solved

Capable of high-speed conversion (down to 10 ms for 2 inputs) and handling diverse inputs, the module cleanly tracks high-speed pressure peaks via 4-20mA or ±10V transducers (±0.05% F.S. accuracy), immediately alerting the CJ-series CPU for critical safety interlocks and dynamic force control.

Hydraulic Test StandHigh-Speed Conversion (10ms)4-20mA Transducers±10V TransmittersPressure Transients Tracking