Technical Specifications

• Brand: RELIANCE (Reliance Electric, Baldor, Rockwell Automation)

• Part Number: 0-58820-B (also O-58820-B / 058820B)

• Type: Multibus ControlNet Module (MBCN)

• Series: AutoMax PLC (Multibus rack)

• Revision: B (Rev 03) (higher than 0-58820‑1/‑2; component/firmware upgrade)

• Protocol: ControlNet v1.5 (scanner/adapter)

• Network Ports: 2 × BNC (COM A / COM B, redundant)

• Configuration Port: RS‑232 (CONFIG, 9‑pin)

• Node Address: 2 × rotary switches (MAC ID 10 / 1)

• Indicators: 7‑segment LED (fault codes), OK (green), PWR, RUN, FAULT, COM

• Backplane: Multibus, +5 VDC power

• I/O Data: Up to 16 KB total (input/output)

• Scheduled Connections: 127 max (480 words each)

• Operating Temp: 0°C to +60°C

• Storage Temp: -40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Dimensions: Standard AutoMax card

• Weight: ~0.75 kg

• Compatibility: All AutoMax racks; ControlNet‑compliant drives (FlexPak 3000), I/O, HMIs

• Certifications: CE, UL

Core Functions

• ControlNet Communication: High‑speed, deterministic scanner/adapter for AutoMax systems.

• Redundant Networking: Dual BNC ports for fault‑tolerant ControlNet cabling.

• AutoMax Integration: Connects PLCs to FlexPak 3000 DC drives, I/O, and HMIs.

• Advanced Diagnostics: RS‑232 for setup/monitoring; 7‑segment LED for detailed fault codes.

• Rev B Enhancements: Improved component reliability, firmware bug fixes, better noise immunity vs. Rev 0/1/2.

• Real‑Time Data Exchange: Drive status, setpoints, and I/O data for coordinated motion control.

Application Scenarios

• AutoMax‑based systems (metallurgy, mining, paper, steel) needing ControlNet connectivity.

• FlexPak 3000 DC drive integration for conveyors, winders, extruders.

• Distributed control systems (DCS) with redundant networking and multi‑device coordination.

• Legacy system upgrades replacing older 0-58820/‑1/‑2 modules with Rev B for better reliability.

Differences from 0-58820/‑1/‑2

• Suffix B = Hardware Variant + Rev 03: Higher revision than standard 0-58820 (Rev 0), 0-58820‑1 (Rev 1), 0-58820‑2 (Rev 2).

• Full Pin‑Compatibility: Direct drop‑in replacement for all earlier 0-58820 series modules.

• Upgraded Components/Firmware: Rev 03 fixes bugs, improves thermal performance, and enhances EMI shielding.

• Discontinued: Obsolete by Rockwell; available only as refurbished/used units.