Reliance 45C-315
May 28, 2026

Reliance 45C-315

The 45C-315 (also written as 45C315) is a 16-slot card rack (backplane enclosure) for the Reliance Electric AutoMate 30/40 series PLC (also branded Baldor Reliance/ABB). It provides mechanical housing, power distribution, and high-speed data backplane for CPU, I/O, communication, and power supply modules in legacy AutoMate systems. This model is discontinued; only refurbished, surplus, or NOS units are available for legacy system maintenance and expansion.

Description

Product Description

The 45C-315 (also written as 45C315) is a 16-slot card rack (backplane enclosure) for the Reliance Electric AutoMate 30/40 series PLC (also branded Baldor Reliance/ABB). It provides mechanical housing, power distribution, and high-speed data backplane for CPU, I/O, communication, and power supply modules in legacy AutoMate systems. This model is discontinued; only refurbished, surplus, or NOS units are available for legacy system maintenance and expansion.

Model Number Interpretation

  • 45C: Unified prefix for Reliance AutoMate 45C-series control components.

  • 315: Designates the 16-slot standard rack (the largest in the 45C31x series: 45C310=6-slot, 45C312=10-slot, 45C313=13-slot, 45C314=14-slot).

  • No suffix: Original hardware revision; variants like 45C315A/B/C/D denote updated revisions with structural or connectivity improvements.

  • Hyphen: Standard industrial part number formatting (often omitted in practice as 45C315).

Technical Specifications

  • Slot Count: 16 total slots (mix of long slots for CPU/power supply and short slots for I/O/communication modules).

  • Backplane: Proprietary AutoMate 30/40 series backplane for 24 VDC power distribution and high-speed data exchange.

  • Material: Rugged metal housing (side panels, vented top/bottom, rear backplane).

  • Mounting: Panel-mount via top/bottom brackets; rear mounting points for secure installation.

  • Ventilation: Top/bottom vents for airflow and heat dissipation.

  • Operating Environment: -10°C to +50°C, 5%–95% non-condensing humidity.

  • Weight: Approximately 2.5 kg.

  • Power Supply Compatibility: Supports 2-slot or 3-slot power supplies (occupies 2–3 slots, reducing available module slots accordingly).

Interface and Configuration

  • Module Installation: Side-loading design for easy insertion/removal of modules; secured with screws.

  • Backplane Connector: Internal edge connectors for module-to-backplane power and data communication.

  • System Configurations:

    • Standalone controller (with CPU + I/O + power supply).

    • Networked system (R-NET communication with other AutoMate PLCs/HMIs).

    • Remote I/O subsystem (for distributed field I/O).

Core Functions

  • Acts as the structural support and housing for AutoMate 30/40 series PLC modules (CPU, I/O, communication, power supply).

  • Distributes 24 VDC power from the backplane to all installed modules.

  • Facilitates high-speed data exchange between modules via the proprietary backplane.

  • Provides mechanical protection and EMI shielding for internal components in harsh industrial environments.

  • Enables system scalability: supports up to 16 modules for large automation systems.

Application Scenarios

  • Replacement/expansion of 16-slot racks in legacy AutoMate 30/40 series PLC systems.

  • Large-scale industrial automation: manufacturing lines, process control, water treatment, power, metallurgy, and petrochemical industry.

  • Legacy equipment retrofitting: maintains compatibility with original AutoMate 30/40 module architecture, reducing upgrade costs.

  • Systems requiring maximum I/O capacity, multi-device networking, and flexible module configuration.

Usage and Maintenance Instructions

  • Installation: Mount the rack securely to the control panel using top/bottom brackets; ensure proper ventilation around vents.

  • Module Insertion: Cut system power before inserting modules into designated slots; push modules firmly until seated and secure with screws.

  • Power-On Check: Verify all modules are properly seated and backplane connections are secure before applying power.

  • Routine Maintenance: Quarterly cleaning of dust from vents and connectors; inspect mounting brackets for tightness; avoid moisture/contaminant exposure.

  • Safety: Disconnect all power and wait for full discharge before disassembly/maintenance to prevent electric shock.


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