Product Description

Model Number Interpretation

• 45C: Prefix for Reliance AutoMate 45 series PLC modules.

• 202: Designates an R‑NET communication processor (vs. 200 = local I/O processor, 204 = failsafe processor).

• No suffix: Indicates the original hardware revision.

Technical Specifications

• Power Supply: 24VDC via system backplane.

• Network: R‑NET peer‑to‑peer coaxial network (BNC connector).

• Status LEDs: 8 indicators: READY, XMIT, RECV, COM OK, 4×COM ER.

• Node Address: Set via two alphanumeric dials (HI/LO: A, C, E, 0, 2, 4, 6, 8).

• Operating Temperature: 0°C to 55°C.

• Mounting: DIN rail or panel mount; rugged metal enclosure.

• Weight: Approx. 1.0 kg.

• Alternate Part Number: 802820‑118RB.

Interface & Communication

• Backplane: Connects to AutoMate 45C series CPU via proprietary backplane bus.

• R‑NET Port: BNC connector for coaxial cable; supports multi‑drop network topology.

• No Local I/O Ports: Designed exclusively for network communication, not direct I/O control.

• Programming: Configured via the main CPU; no independent programming port.

Core Functions

• Manages R‑NET network communication for up to 32 nodes.

• Handles data framing, error checking, and retransmission for reliable communication.

• Provides real‑time status monitoring via front‑panel LEDs.

• Enables distributed I/O expansion across multiple stations.

• Offloads communication tasks from the main CPU to improve system performance.

Application Scenarios

• R‑NET Network Master/Slave in AutoMate 45C PLC systems.

• Distributed control systems for manufacturing, process control, and material handling.

• Legacy system upgrades replacing older 45C202 units in production lines.

• High‑reliability environments requiring robust industrial communication.

Usage & Maintenance

• Install securely in a single backplane slot; ensure BNC cable is properly terminated.

• Set node address via HI/LO dials before powering on.

• Inspect LEDs regularly: READY (on = operational), COM OK (on = no errors).

• Keep enclosure clean and free of dust to prevent overheating.

• Use only with AutoMate 45C series backplanes and CPUs; not compatible with AutoMate 20/30/40 series.