Product Description

Model Number Interpretation

• 45C: Unified prefix for all modules in the Reliance AutoMate PLC series.

• 17: Designates an AutoMate 15 CPU with R‑net communication capability (networked variant of the non‑networked 45C15 CPU).

• C: Indicates the third hardware revision, featuring upgraded components, enhanced noise immunity, and optimized firmware for greater stability in industrial settings.

• The hyphen in 45C‑17C is a common formatting variant; the official part number is 45C17C.

Technical Specifications

• Power Supply: 115/230 VAC switchable, 50/60 Hz; rated current 0.5 A (115 VAC) / 0.25 A (230 VAC); internal 3AG 1 A fuse for circuit protection.

• Memory: 1K × 16‑bit non‑volatile memory, retaining user programs and data without battery backup.

• Execution Speed: 4 milliseconds per ladder logic instruction.

• I/O Capacity: Maximum 64 digital I/O points via expansion modules.

• Internal Resources: 56 data registers, 64 internal control coils.

• Front Panel LEDs: POWER, RUN, CPU READY, COM DATA, FORCING, RAIL FAULT for real‑time status and fault diagnostics.

• Operating Temperature: 0°C to +55°C; enhanced thermal stability over B revision.

• Environmental: Improved EMI/RFI shielding for resistance to electrical noise and interference.

• Certification: FCC Class A (industrial use).

• Mounting: DIN rail or panel mount; weight approx. 1.2 kg.

Interface and Communication Configuration

• Backplane Interface: Dedicated connector for AutoMate 15 I/O rails (e.g., 45C1/45C1A) via proprietary backplane bus.

• R‑net Port: BNC connector for peer‑to‑peer network; supports up to 32 nodes on one coaxial cable, enabling data sharing and coordinated control.

• Programming Port: Female port for handheld programmer or 45C115 CRT terminal (program upload, download, editing, online monitoring).

• Expansion Ports: Four male ports for digital I/O module expansion, supporting the full 64‑point I/O configuration.

• Programming Language: Ladder Diagram (LD) only.

• Protocols: Proprietary R‑net (network) and backplane bus; no native Ethernet or Modbus support.

Core Functions

• Executes user‑defined ladder logic programs for discrete automation control.

• Real‑time scanning and control of up to 64 digital I/O points (sensors, switches, relays, actuators).

• R‑net Networking: Peer‑to‑peer communication between 32 PLC nodes; enables distributed control and data exchange across production lines.

• Built‑in LED diagnostics for rapid identification of power faults, CPU errors, communication issues, rail connection problems, and forced I/O states.

• Non‑volatile memory preserves programs and operational data during power outages without battery backup.

• Supports online program monitoring, I/O forcing, and program upload/download for system maintenance.

• Enhanced EMI/RFI immunity in C revision ensures stable operation in high‑interference industrial environments.

• Plug‑and‑play compatibility with all AutoMate 15 series I/O modules; direct replacement of 45C17/45C17B without program modifications.

Application Scenarios

• Legacy AutoMate 15 PLC systems requiring networked peer‑to‑peer control (e.g., interconnected conveyor lines, packaging systems).

• Small‑to‑medium discrete manufacturing: assembly lines, material handling, pump/valve control with distributed I/O.

• Harsh industrial environments: paper mills, textile plants, metalworking factories (high temperature, electrical noise, vibration).

• Retrofit and maintenance projects replacing failed 45C17/45C17B CPUs in aging facilities.

• Systems needing multi‑PLC coordination without Ethernet infrastructure (R‑net coaxial network).

Usage and Maintenance Instructions

• Installation: Secure the module firmly to a DIN rail or panel; ensure the backplane connector is fully locked to avoid loose connections.

• Pre‑Power Check: Verify the 115/230 VAC voltage setting, tighten all wiring terminals, and confirm no short circuits before applying power.

• Routine Maintenance: Conduct quarterly inspections of LED status, cable tightness, and module cleanliness; remove dust regularly to prevent overheating.

• Power Safety: Always disconnect the main power supply and allow sufficient discharge time before removing or servicing the module to prevent electric shock.

• Replacement Guidelines: 45C17C is backward compatible with 45C17/45C17B; direct swap without reprogramming. It can also be replaced by 45C17D (later revision) if needed.

• Accessory Compatibility: Use only original Reliance AutoMate 15 series I/O modules, programming devices, and R‑net coaxial cables to ensure proper functionality and avoid compatibility issues.