Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | KJ3241X1-BK1 |
| Manufacturer | Emerson |
| Product Family | DeltaV S-Series |
| Product Type | Simplex Serial Interface Card |
| Catalog Reference | 12P4710X062 |
| Number of Serial Ports | 2 |
| Supported Electrical Interfaces | RS232, RS422, RS485 |
| Serial Modes | Half-duplex and full-duplex RS422/485 |
| Data Sets | 32 total; 16 per port |
| Local Bus Power | 12 VDC at 300 mA |
| Terminal Block | KJ4006X1-BD1 |
| Terminal Block Key | D4 |
| Port Isolation | Ports isolated from the system and from each other |
| Data Configuration | 7 or 8 data bits; 1 or 2 stop bits |
| Protection Rating | IP20 |
| Operating Temperature | -40°C to +70°C |
| Relative Humidity | 5–95%, non-condensing |
| Shock Resistance | 10 g, half-sine wave, 11 ms |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 |
Specifications are compiled from product documentation and technical listings. Confirm the exact terminal-block pairing and card revision against the installed hardware.
Product Introduction
Emerson KJ3241X1-BK1 DeltaV S-Series Serial Interface Card
The Emerson KJ3241X1-BK1 is a simplex serial interface card for the DeltaV S-Series control platform. It provides two configurable serial ports supporting RS232, RS422, and RS485 connections, allowing the control system to exchange data with compatible external equipment. Each port supports up to 16 datasets, for 32 datasets per card.
The card is suited to installations that need serial connectivity for legacy instruments, controllers, and other industrial devices. Its isolated serial ports help separate communication circuits from the system and from each other. The correct terminal block, serial wiring, and driver configuration must be established before commissioning.
KJ3241X1-BK1
Application Scenarios & Field Pitfalls (Engineer’s Perspective)
A serial communication failure can interrupt data exchange with a weighing instrument, package controller, or legacy PLC even when the DeltaV controller and field equipment remain operational. Replacing the interface card without checking port configuration, wiring mode, and driver settings can leave the original communication fault unresolved.
Typical application scenarios:
- Modbus device integration: Connecting compatible instruments and controllers to DeltaV through serial Modbus communication.
- Legacy PLC communication: Supporting equipment that uses RS232 or RS422/485 serial connections.
- Weighing and measurement systems: Exchanging configured datasets with compatible industrial weighing equipment.
- Plant equipment interfaces: Connecting external devices that require serial data exchange with a DeltaV control system.
The actual application depends on the installed driver and device protocol configuration. The card is documented for serial communication, but not every serial device or protocol is automatically supported.
Field pitfalls to check before installation:
1. Simplex versus redundant configuration: KJ3241X1-BK1 is identified as a simplex interface card. Do not confuse it with KJ3241X1-BA1, which is identified as a redundant serial interface card. A redundant installation requires the correct card and terminal-block architecture.
2. Terminal-block keying: Confirm the KJ4006X1-BD1 terminal block and D4 key position before installation. A mismatch in mechanical keying or terminal-block assignment can prevent correct installation.
3. Serial wiring and grounding: Verify RS232 versus RS422/485 selection, transmit/receive polarity, half- or full-duplex wiring, baud rate, parity, and external grounding. Incorrect RS485 polarity or termination can cause intermittent communication or complete loss of data.
Procurement and inspection: Check the complete model number, catalog reference, hardware revision, and terminal-block compatibility. Ask the supplier to distinguish unused stock from previously installed or repaired equipment. For a used card, request functional test evidence for both serial ports where suitable test equipment is available.
Related Products
- KJ4006X1-BD1 — Associated simplex terminal block for the KJ3241X1-BK1. Verify the D4 key position and terminal-block condition before installation.
- KJ3241X1-BA1 — Redundant Serial Interface Card. It has a different configuration from the simplex BK1 version and should not be treated as a direct substitute.
- KJ3241X1-BA2 — Related DeltaV serial interface model referenced in Emerson documentation for compatibility with earlier DeltaV versions. Confirm the applicable system release before selecting it.
- VE4206P2 — Emerson M-Series Serial Interface Card, two-port simplex configuration. It belongs to the M-Series rather than the S-Series, so it is not a drop-in replacement for the BK1.
- VE4236P2 — Emerson M-Series redundant two-port Serial Interface Card. Consider only when reviewing a broader M-Series system design, not as a direct BK1 replacement.
Replacement guidance: For an existing DeltaV S-Series installation, match KJ3241X1-BK1 and its terminal-block arrangement first. Before approving another model, verify the DeltaV version, simplex or redundant architecture, serial driver, port configuration, and field wiring.
