Allen-Bradley 1747-KE Communication Interface Module
The Allen-Bradley 1747-KE serves as the primary 1747-KE Communication Interface Module utilized to execute protocol translation and remote data exchange across SLC 500 platforms. It bridges isolated RS-232 serial links running DF1 protocol directly onto DH-485 multi-drop networks, permitting seamless programming, data monitoring, and peer-to-peer processor communications.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-KE |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.93 lbs (0.42 kg) |
| Dimensions | Single-slot SLC 500 rack form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 5 to 24 VDC external / 0.04 to 0.15 A backplane current |
| Communication Protocols | DH-485, DF1 (Full-Duplex / Half-Duplex) |
| Interface Ports | 3 Ports (1x DH-485, 1x DF1 serial, 1x configuration port) |
| Product Family | SLC 500 |
| Mounting Style | SLC 500 Chassis Backplane Mount |
Backplane Bus Velocity & Deterministic Network Execution
The 1747-KE module provides hardware-level buffering and packet serialization to optimize backplane bus communication velocity when passing data between serial field devices and the main processor. Operating across deterministic networks, the module handles full-duplex and half-duplex DF1 conversions without placing computational overhead on the CPU scan cycle. Onboard firmware features adjustable baud rates, node addressing, and error-checking algorithms (CRC/LRC) to preserve message integrity in electrically noisy industrial environments.
Frequently Asked Questions
Q: Can the 1747-KE module be used to connect a modem for remote dial-up monitoring of an SLC 500 processor?
A: Yes, the 1747-KE module supports DF1 half-duplex modem master/slave configurations, allowing remote supervisory software to dial into the SLC 500 network.
Q: What is the purpose of the third dedicated configuration port on the module?
A: The configuration port allows engineers to connect a terminal or PC running terminal emulation software to set operating parameters, communication speeds, and protocol modes independently of the active runtime serial channels.
Field Installation Guidelines
- Chassis Slot Insertion: Insert the 1747-KE module into any available local I/O slot in an SLC 500 chassis (excluding slot 0). Slide the module firmly along the slot guides until top and bottom chassis latches snap securely into place.
- Serial Cable Shielding & Routing: Use shielded twisted-pair cables for DH-485 and DF1 RS-232 serial connections. Route signal wiring in dedicated grounded wireways isolated from high-voltage motor conductors and AC power lines to avoid EMI cross-talk.
- Grounding & Surge Suppression: Ensure the SLC 500 chassis frame is connected to the master enclosure earth ground bar via a low-impedance copper strap. Terminate serial cable shields at a single ground reference point to prevent ground loop currents across communication nodes.
Allen-Bradley 1747-KE Communication Interface Module
Allen-Bradley 1747-KE Communication Interface Module
The Allen-Bradley 1747-KE serves as the primary 1747-KE Communication Interface Module utilized to execute protocol translation and remote data exchange across SLC 500 platforms. It bridges isolated RS-232 serial links running DF1 protocol directly onto DH-485 multi-drop networks, permitting seamless programming, data monitoring, and peer-to-peer processor communications.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-KE |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.93 lbs (0.42 kg) |
| Dimensions | Single-slot SLC 500 rack form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 5 to 24 VDC external / 0.04 to 0.15 A backplane current |
| Communication Protocols | DH-485, DF1 (Full-Duplex / Half-Duplex) |
| Interface Ports | 3 Ports (1x DH-485, 1x DF1 serial, 1x configuration port) |
| Product Family | SLC 500 |
| Mounting Style | SLC 500 Chassis Backplane Mount |
Backplane Bus Velocity & Deterministic Network Execution
The 1747-KE module provides hardware-level buffering and packet serialization to optimize backplane bus communication velocity when passing data between serial field devices and the main processor. Operating across deterministic networks, the module handles full-duplex and half-duplex DF1 conversions without placing computational overhead on the CPU scan cycle. Onboard firmware features adjustable baud rates, node addressing, and error-checking algorithms (CRC/LRC) to preserve message integrity in electrically noisy industrial environments.
Frequently Asked Questions
Q: Can the 1747-KE module be used to connect a modem for remote dial-up monitoring of an SLC 500 processor?
A: Yes, the 1747-KE module supports DF1 half-duplex modem master/slave configurations, allowing remote supervisory software to dial into the SLC 500 network.
Q: What is the purpose of the third dedicated configuration port on the module?
A: The configuration port allows engineers to connect a terminal or PC running terminal emulation software to set operating parameters, communication speeds, and protocol modes independently of the active runtime serial channels.
Field Installation Guidelines
- Chassis Slot Insertion: Insert the 1747-KE module into any available local I/O slot in an SLC 500 chassis (excluding slot 0). Slide the module firmly along the slot guides until top and bottom chassis latches snap securely into place.
- Serial Cable Shielding & Routing: Use shielded twisted-pair cables for DH-485 and DF1 RS-232 serial connections. Route signal wiring in dedicated grounded wireways isolated from high-voltage motor conductors and AC power lines to avoid EMI cross-talk.
- Grounding & Surge Suppression: Ensure the SLC 500 chassis frame is connected to the master enclosure earth ground bar via a low-impedance copper strap. Terminate serial cable shields at a single ground reference point to prevent ground loop currents across communication nodes.
