OVERVIEW

Official designation: Allen-Bradley 1797-ACNR15 (FLEX Ex I/O, ControlNet Communication Adapter)

Role/Application: Provides redundant ControlNet connectivity at 5 Mbps for up to eight intrinsically safe FLEX Ex I/O modules in hazardous Zone 1/Division 1 areas.

KEY SPECS SUMMARY

Power: 9.5 Volts DC input, 8.5 Watts consumption

Interfaces / Ports: Two ControlNet BNC coax ports

Indicators: Comm A, Comm B, Module Status, Power LEDs

Operating Temp: Minus 20 to 70 degrees C

Platform / Compatibility: FLEX Ex system, ControlNet Protocol V 1.5

Limit: Supports 8 I/O modules, 5 Mbps rate

Lifecycle: Active

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the power output provided by the 1797-ACNR15 adapter to the I/O backplane?

A: The adapter provides an intrinsically safe output power of 5.4 Volts DC to the backplane.

Wiring & Installation:

Q: What is the maximum recommended wire size for field wiring connections to the terminal base?

A: The maximum stranded conductor wire size permitted is 3.31 mm2 or 12 AWG.

Troubleshooting & Compatibility:

Q: What is the meaning of the red/green status indicators for the Comm A and Comm B ports?

A: Red/green LEDs indicate the communication link status and activity for each redundant port.

Replacement & Upgrades:

Q: What is the intrinsically safe module type classification for the 1797-ACNR15?

A: The module type is certified as Ex ib IIB/IIC T4 or AEx ib IIC T4.