The Allen-Bradley 1775-S5, also cataloged as the 1775-S5 Communication Module, operates as a dedicated hardware component for high-speed Data Highway Plus (DH+) data transmission and inter-node packet handling within Allen-Bradley PLC-5 control systems.

Hardware Identification & Subsystem Architecture

The 1775-S5 module functions as a local communication interface designed for insertion into PLC-5 chassis slots. The module provides multi-node routing capability supporting up to 64 addressable network nodes at a fixed transmission speed of 230.4 kbps over trunk line cabling. Internal power management rails generate galvanic isolation across the communications interface to mitigate ground loop noise in distributed control configurations.

Electrical and Environmental Specifications

Deterministic Network Performance & Processing

The interface card manages high-density data packets using optimized backplane bus communication velocity across the chassis backplane. System diagnostics continuously track packet transmission errors, maintaining strict firmware flash compatibility across local and remote chassis drops. Predictable frame processing speeds allow reliable scaling for high-density I/O configurations across local PLC-5 automation loops.

Package Component Checklist

• 1 x Allen-Bradley 1775-S5 Communication Module Unit

• 1 x Anti-Static Shield Protective Enclosure

• 1 x System Terminal Installation Leaflet

Chassis Mounting & Field Wiring Directives

• Chassis Insertion Rules: Power down the local rack assembly prior to inserting the 1775-S5 module into the chassis backplane to prevent physical connector damage.

• Network Line Termination: Install external 75 ohm termination resistors across the physical end nodes of the DH+ differential communications trunk line.

• Shield Grounding Protocols: Connect cable shielding braid continuously across all node taps, earthing the shield wire at a single reference point on the panel earth bus.

• Power Supply Wiring: Verify supply voltage jumpers match incoming 115 VAC or 230 VAC field utility connections before applying power.

Frequently Asked Questions

• What is the maximum data rate supported by the 1775-S5 module?

  The module operates on standard Data Highway Plus (DH+) networks at a dedicated data transmission rate of 230.4 kbps.

• How many nodes can be addressed on a single network segment?

  The 1775-S5 interface architecture supports a maximum capacity of up to 64 individual network nodes.

• Does the 1775-S5 support hot-swapping under live chassis power?

  No, system power to the rack backplane must be completely isolated before inserting or removing the module.

• What termination resistance is required for the communications line?

  External 75 ohm termination resistors must be installed across the physical ends of the communication trunk cable.

• What isolation voltage rating is featured on the communication circuit?

  The communications logic provides galvanic isolation rated up to 1500 VAC to protect backplane circuits from field transients.

• What power rails are drawn from the system logic board?

  The module logic circuits utilize internal power rails rated at 5 VDC at 6 A, 20 mA, and +/-15 VDC.

• What input voltage levels are accepted by the module power supply section?

  The integrated power supply accepts single-phase AC inputs of 115 VAC or 230 VAC (+/-15%).

• What is the maximum peak power consumption during full network operation?

  The module draws a maximum peak power rating of 55 W under full load and network traffic conditions.