Name: KJ3241X1-BK1 DeltaV S‑Series Dual‑Port Isolated Serial Interface Module, Emerson DCS Serial Communication Gateway for Modbus RTU, Serial Printers & Third‑Party Serial Field Devices - MASSIVE
Brand: EMERSON

Description

KJ3241X1-BK1 DeltaV S‑Series Dual‑Port Isolated Serial Interface Module, Emerson DCS Serial Communication Gateway for Modbus RTU, Serial Printers & Third‑Party Serial Field Devices

Product Application

KJ3241X1-BK1 is an S‑Series serial communication interface module for Emerson DeltaV DCS. It provides two isolated serial ports to connect DeltaV control system to legacy serial equipment, supporting RS‑232, RS‑422, half‑duplex and full‑duplex RS‑485 physical layers. It is widely used to realize Modbus RTU communication with third‑party PLCs, weighing controllers, vibration monitoring systems, serial printers, remote terminal units and other serial‑based industrial instruments. Common deployment in petrochemical, oil & gas, power, pulp & paper and pharmaceutical plants. The serial module maps external serial device registers into DeltaV DST tags, making third‑party device real‑time data visible on operator workstations. It supports bidirectional data exchange: DeltaV can read field device status and send setpoint commands back to serial equipment. Certified for Zone 2 / Class I Division 2 hazardous cabinet installation.

KJ3241X1-BK1

Product Specifications

Part Number: KJ3241X1-BK1
Product Family: DeltaV S‑Series I/O & Communication Modules
Port Quantity: 2 independent electrically isolated serial ports
Supported Physical Interfaces: RS232, RS422, RS485 (Half‑Duplex / Full‑Duplex)
Max DST Data Points: 32 total points, up to 16 data points per serial channel
Hot‑Swap: Hot‑swappable module
Mounting: Plug‑in module installed onto matching S‑Series terminal base
Communication Protocols: Mainly Modbus RTU, generic serial driver support
Port Isolation: Each serial port is galvanically isolated from DeltaV LocalBus and between ports
Certification: FM Class I Div 2, ATEX II 3G Ex ec IIC T4 Gc, IECEx
Protection: IP20 for cabinet installation
Power Source: Powered by DeltaV rack LocalBus 12 VDC, 300 mA

Core Technical Parameters

Baud Rate Range: 300 / 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 / 115200 bps
Serial Frame: 7 or 8 data bits; 1 / 2 stop bits; odd / even / no parity
Operating Temperature: -40 ℃ ~ +70 ℃
Storage Temperature: -40 ℃ ~ +85 ℃
Relative Humidity: 5%–95%, non‑condensing
Airborne Contaminant Rating: ISA‑S71.04 Class G3 (conformal coated PCB)
Vibration Resistance: 1 mm pp (2–13.2 Hz); 0.7 g (13.2–150 Hz)
Shock Resistance: 10 g half‑sine, 11 ms duration
Status Indication: Front panel LED for module run, fault and port communication activity
Diagnostics: Serial port timeout, communication failure, wiring fault alarm

Recommended Matching Models (8 Models)

Supporting hardware for complete DeltaV serial communication rack setup:

VE3008 KJ2005X1-MQ DeltaV MQ Controller
S‑Series Terminal Base for KJ3241X1-BK1
KJ1501X1-BC2 Redundant Rack Power Supply
12P2532X062 DeltaV I/O Rack Backplane
Modbus RTU Third‑Party PLC
Shielded RS485 twisted‑pair communication cable
Serial isolation repeater (for long‑distance RS485 bus)
DeltaV Engineering Workstation for serial driver configuration

KJ3241X1-BK1

Product Features

✅ Dual Independent Galvanically Isolated Serial Ports Two fully isolated channels prevent ground loop interference between DeltaV system and different third‑party serial devices. Fault on one serial bus will not crash the second communication channel.

✅ Multi‑Mode Serial Physical Layer Support One module supports RS232, RS422 and RS485 half/full duplex, flexible wiring selection to match different serial instrument interface types without adding extra converters.

✅ Modbus RTU Master / Slave Communication Built‑in Modbus RTU driver. DeltaV can act as Modbus master to poll remote slave devices, or work as Modbus slave for upper host system to read DeltaV tags.

✅ Hot‑Swap Online Replacement Faulty serial interface module can be replaced while I/O rack remains powered on, minimising plant communication downtime.

✅ Hazardous Area Cabinet Approval Suitable for installation in Zone 2 / Division 2 explosion‑proof control cabinets close to process units, shortening long serial field cable runs.

✅ Seamless DeltaV Tag Mapping Serial device register data is directly converted to DeltaV DST tags. The process data can be used for PID control, alarming, trend recording and historian without custom programming.

✅ Rich Port‑Level Communication Diagnostics Real‑time serial timeout, frame error and offline alarm are reported to DeltaV operator station. Maintenance personnel can quickly locate broken serial bus or device failure.

Installation Guidelines

Power off the I/O rack for non‑redundant installation. Hot‑swap replacement can be performed following DeltaV operation procedure.
Mount the dedicated S‑Series terminal base to I/O rack slot first, then insert KJ3241X1-BK1 module and lock front fastener.
Terminate RS232 / RS485 / RS422 shielded twisted pair cable to corresponding terminals on the base. Use single‑point shield grounding for serial bus.
For multi‑drop RS485 network, install terminal resistor at both ends of the bus as required.
Separate serial communication cables from high‑voltage power cables in cable tray to avoid EMI interference.
Power on the rack, verify module RUN LED steady on, no hardware fault alarm.
Open DeltaV engineering station, select serial driver, configure baud rate, parity, Modbus address and register mapping for each port.
Download configuration to serial module, check port communication LED blinking, verify serial device data correctly displayed on operator graphic before putting online.

Maintenance Instructions

Daily Maintenance Check front panel module status and port activity LEDs. Monitor DeltaV alarm list for serial communication timeout fault. Inspect communication terminals for looseness.

Periodic Maintenance Every 6–12 months: Back up serial driver configuration. Inspect dust accumulation on module PCB. Check bus terminal resistor and cable insulation. Record serial communication error counters.

Fault Maintenance

Port communication timeout: Check serial cable breakage, wrong baud rate / parity setting, power supply of remote serial device.
Ground loop noise: Verify serial port isolation and cable shield grounding.
Module offline: Re‑seat module onto terminal base; inspect rack LocalBus power. Replace spare KJ3241X1-BK1 and restore saved serial configuration.
ESD protection required when handling the module. Do not open module housing.

Long‑Term Operation Tips Avoid excessively long bus without signal repeater. Install surge protection for field serial cables running outdoors. Keep control cabinet dry and dust‑free.