Emerson KJ3243X1-BB2 Profibus DP Interface Card

The KJ3243X1-BB2 Profibus DP interface card connects DeltaV controllers to Profibus DP field networks. Emerson engineers this card for plants that mix DeltaV control with third-party Profibus devices. It handles master communication and passes device data to the controller over the backplane.

Network Ports and Communication Capacity

Two Profibus DP ports support master operation at speeds from 9.6 kbps to 12 Mbps. Each port addresses up to 126 Profibus stations on a single network segment. An onboard processor manages the DP protocol cycle without loading the controller CPU. Additionally, per-port LEDs show bus activity and fault states during diagnostics.

Physical Dimensions and Power Details

The card measures 210 mm in length, 90 mm in width, and 45 mm in depth. It weighs roughly 0.45 kg, and it seats in a standard DeltaV carrier slot. The backplane supplies 24 VDC at a maximum draw of 0.9 A. Internal capacitors hold enough charge to complete a clean shutdown during brief supply loss.

Parameter	Specification
Model	KJ3243X1-BB2
Profibus Ports	2 × DP
Max Speed	12 Mbps
Stations per Port	Up to 126
Supply Voltage	24 VDC
Current Draw	0.9 A max
Length	210 mm
Width	90 mm
Depth	45 mm
Weight	0.45 kg
Indicators	Per-port bus activity and fault LEDs

Installation and Configuration Notes

Technicians seat the KJ3243X1-BB2 in its carrier slot and secure the rear backplane connector. Field wiring lands on the terminal block through shielded Profibus cable with proper termination. Engineers set the station address and baud rate through the DeltaV configuration tool. Consequently, the card begins exchanging data as soon as the controller loads its database.

Why This Card Fits Mixed-Protocol Plants

Plant teams select the KJ3243X1-BB2 for its dual-port capacity and 12 Mbps line speed. Native Profibus DP support removes the need for external gateways and extra wiring. The diagnostic LEDs shorten troubleshooting during bus faults. This card suits refineries, chemical plants, and manufacturing lines that run mixed control networks.