The 45C-344, also referred to as 45C344, is an 8-channel analog input module for Reliance AutoMate 30/40 series PLC systems. It receives ±10 VDC bipolar analog 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 legacy system maintenance.

45C: Unified prefix for Reliance AutoMate 45C-series control components.344: Designates the 8-channel ±10 VDC bipolar analog input module.No suffix: Represents the original hardware version. There are no mainstream revised versions marked with A/B/C/D.Hyphen: Standard writing format for industrial part numbers. Both 45C-344 and 45C344 refer to the same product with identical functions and compatibility.

Input Channels: 8 single-ended channels, configurable for differential connection.Input Range: ±10 VDC bipolar.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 ±10 VDC bipolar analog signals from temperature, pressure, flow and other field devices into 12-bit digital signals.Adopts isolated design for all channels to improve anti-interference performance in industrial environments.Transmits converted digital data to the CPU through the backplane for subsequent logic processing.Supports signal scaling and digital filtering configured by PLC programs.Detects faults such as open circuit, short circuit and overvoltage, and feeds fault information back 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 acquisition for field instruments with standard ±10 VDC output.High-density analog signal collection scenarios 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.