Allen-Bradley 1761-NET-AIC Advanced Interface Converter
The Allen-Bradley 1761-NET-AIC, also cataloged as the 1761-NET-AIC AIC+ Advanced Interface Converter, operates as a dedicated hardware component for protocol-compliant serial signal isolation and media conversion within DH-485 communication networks. The module provides physical interface translation across two RS-232 ports and one DH-485 port, enabling point-to-point and multi-drop network integration for MicroLogix and SLC 500 controllers. It operates on an input voltage range of 20.4 to 28.8 VDC with a nominal current draw of 120 mA at 24 VDC and maintains galvanic isolation tested at 500 VDC for 60 seconds.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1761-NET-AIC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 3.00 kg (6.61 lbs) |
| Dimensions | 5.60 in x 4.10 in x 2.40 in (14.2 cm x 10.4 cm x 6.1 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 2.88 W (120 mA @ 24 VDC; Max Inrush: 200 mA @ 24 VDC) |
| Power Supply DC Range | 20.4 to 28.8 VDC |
| Communication Ports | 2 RS-232 ports (Port 1: 9-pin D-shell; Port 2: 8-pin mini-DIN), 1 DH-485 port (6-pin Phoenix) |
| Network Protocol | DH-485 protocol across all serial interfaces |
| Isolation Voltage | Tested at 500 VDC for 60 seconds |
| Hazardous Location Rating | UL Listed Class 1, Division 2, Groups A, B, C, D |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1761-NET-AIC manages serial bus communication velocity across DH-485 network segments by executing hardware-level RS-232 to RS-485 signal conversions without introducing processor-level latency. Firmware flash compatibility across MicroLogix 1000/1200/1500 and SLC 500 host platforms ensures deterministic token-passing schedules over the DH-485 trunkline. The unit scales communication node connectivity while isolating low-level serial transceivers from common-mode ground potential shifts, preserving message packet integrity across multi-drop device layouts.
Frequently Asked Questions
Q: How is external 24 VDC power supplied to the 1761-NET-AIC converter?
A: Power can be supplied via the external 24 VDC screw terminal block (20.4 to 28.8 VDC) or drawn directly through the 8-pin mini-DIN RS-232 connection when connected to a host MicroLogix controller capable of providing 24 VDC bus power on Port 2.
Q: What is the purpose of the 500 VDC isolation rating on the 1761-NET-AIC?
A: The 500 VDC isolation barrier separates the DH-485 network channel from the RS-232 serial ports and primary power supply leads, preventing ground loop currents and transient high-voltage surges from damaging connected controllers.
Field Installation Guidelines
- Power & Network Disconnection: Turn off all external 24 VDC power supplies and disconnect active serial network cables before mounting or wiring the 1761-NET-AIC converter.
- DIN Rail / Panel Mounting: Mount the module onto a 35 mm DIN rail or attach it to an enclosure backplate using mounting screws. Ensure the metal grounding spring contacts the grounded DIN rail or panel surface properly.
- Port & Cable Routing: Connect RS-232 communication cables to Port 1 (9-pin D-shell) or Port 2 (8-pin mini-DIN). Connect the DH-485 network trunkline cable (Belden 3105A or equivalent) to the 6-pin removable Phoenix connector on Port 3. Route network cables away from AC power wiring and high-frequency variable frequency drive output leads.
- Hazardous Location Compliance: When installing in Class 1, Division 2 hazardous locations, verify that all external wiring meets National Electrical Code (NEC) Division 2 wiring standards and that pluggable connectors are firmly screwed into place.
Allen-Bradley 1761-NET-AIC Advanced Interface Converter
Allen-Bradley 1761-NET-AIC Advanced Interface Converter
The Allen-Bradley 1761-NET-AIC, also cataloged as the 1761-NET-AIC AIC+ Advanced Interface Converter, operates as a dedicated hardware component for protocol-compliant serial signal isolation and media conversion within DH-485 communication networks. The module provides physical interface translation across two RS-232 ports and one DH-485 port, enabling point-to-point and multi-drop network integration for MicroLogix and SLC 500 controllers. It operates on an input voltage range of 20.4 to 28.8 VDC with a nominal current draw of 120 mA at 24 VDC and maintains galvanic isolation tested at 500 VDC for 60 seconds.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1761-NET-AIC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 3.00 kg (6.61 lbs) |
| Dimensions | 5.60 in x 4.10 in x 2.40 in (14.2 cm x 10.4 cm x 6.1 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 2.88 W (120 mA @ 24 VDC; Max Inrush: 200 mA @ 24 VDC) |
| Power Supply DC Range | 20.4 to 28.8 VDC |
| Communication Ports | 2 RS-232 ports (Port 1: 9-pin D-shell; Port 2: 8-pin mini-DIN), 1 DH-485 port (6-pin Phoenix) |
| Network Protocol | DH-485 protocol across all serial interfaces |
| Isolation Voltage | Tested at 500 VDC for 60 seconds |
| Hazardous Location Rating | UL Listed Class 1, Division 2, Groups A, B, C, D |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1761-NET-AIC manages serial bus communication velocity across DH-485 network segments by executing hardware-level RS-232 to RS-485 signal conversions without introducing processor-level latency. Firmware flash compatibility across MicroLogix 1000/1200/1500 and SLC 500 host platforms ensures deterministic token-passing schedules over the DH-485 trunkline. The unit scales communication node connectivity while isolating low-level serial transceivers from common-mode ground potential shifts, preserving message packet integrity across multi-drop device layouts.
Frequently Asked Questions
Q: How is external 24 VDC power supplied to the 1761-NET-AIC converter?
A: Power can be supplied via the external 24 VDC screw terminal block (20.4 to 28.8 VDC) or drawn directly through the 8-pin mini-DIN RS-232 connection when connected to a host MicroLogix controller capable of providing 24 VDC bus power on Port 2.
Q: What is the purpose of the 500 VDC isolation rating on the 1761-NET-AIC?
A: The 500 VDC isolation barrier separates the DH-485 network channel from the RS-232 serial ports and primary power supply leads, preventing ground loop currents and transient high-voltage surges from damaging connected controllers.
Field Installation Guidelines
- Power & Network Disconnection: Turn off all external 24 VDC power supplies and disconnect active serial network cables before mounting or wiring the 1761-NET-AIC converter.
- DIN Rail / Panel Mounting: Mount the module onto a 35 mm DIN rail or attach it to an enclosure backplate using mounting screws. Ensure the metal grounding spring contacts the grounded DIN rail or panel surface properly.
- Port & Cable Routing: Connect RS-232 communication cables to Port 1 (9-pin D-shell) or Port 2 (8-pin mini-DIN). Connect the DH-485 network trunkline cable (Belden 3105A or equivalent) to the 6-pin removable Phoenix connector on Port 3. Route network cables away from AC power wiring and high-frequency variable frequency drive output leads.
- Hazardous Location Compliance: When installing in Class 1, Division 2 hazardous locations, verify that all external wiring meets National Electrical Code (NEC) Division 2 wiring standards and that pluggable connectors are firmly screwed into place.
