The 45C342 is an 8-channel analog input module designed for Reliance AutoMate 30/40 series PLC systems. It receives 0–10 VDC signals from field sensors and transmitters, and converts analog signals into digital data for the PLC CPU. This model is discontinued. Only refurbished, surplus or NOS units are available for maintenance of legacy systems.

45C: Unified prefix for Reliance AutoMate 45C-series control components.342: Designates the 8-channel 0–10 VDC analog input module.No suffix: Represents the original hardware version. There are no mainstream revised versions marked with A/B/C/D.

Input Channels: 8 single-ended channels, configurable for differential connection.Input Range: 0–10 VDC.Resolution: 12-bit ADC.Conversion Rate: Approximately 10 ms per channel.Accuracy: ±0.1% of full scale at 25°C.Input Impedance: Greater than 1 MΩ.Backplane Power Requirement: 5 VDC, 200 mA.Slot Occupation: Occupies 1 standard slot.Operating Temperature: 0°C to +55°C.Dimensions: About 96.5 × 70.5 × 56.5 mm.Weight: Approximately 0.45 kg.Isolation Rating: 500 Vrms between channels and backplane.

Module Installation: Side-loading design for 45C31x series racks, fixed with screws.Backplane Connection: Built-in edge connector for power supply, data transmission and status signal exchange.Front Panel: Equipped with ACTIVE and READY status indicators.Terminal Block: 16-pin detachable screw terminal for field wiring of signal lines and shielding lines.Configuration: The input range is fixed. Signal scaling and filtering functions are set via PLC software.

Converts 0–10 VDC analog signals from field devices such as temperature, pressure and flow sensors into 12-bit digital signals.Features isolated design for all channels to enhance anti-interference capability in industrial environments.Transmits converted digital data to the CPU through the backplane for logic processing.Supports signal scaling and digital filtering configured by PLC programs.Detects circuit faults including open circuit, short circuit and overvoltage, and sends fault information to the CPU.

Analog input expansion for AutoMate 30/40 series PLC racks.Operation and maintenance of legacy industrial equipment in manufacturing, process control, water treatment and HVAC industries.Signal collection for field instruments with standard 0–10 VDC output.High-density analog signal acquisition occasions with 8 channels per slot.

Installation: Cut off the power supply of the rack before inserting the module and tighten the fixing screws.Wiring: Use shielded cables for signal connection, and ground the shield at one end only.Configuration: Complete signal parameter setting and scaling in the PLC programming software.Routine Check: Inspect the status indicators every month and clean the terminal block regularly every quarter.Safety: Disconnect all power sources before disassembling the module to avoid electric shock.