Anritsu KL Series Modules: KL2300A

Technical Dossier

Product Details And Specifications

Anritsu KL Series: Comprehensive Module Range and Technical Overview

The Anritsu KL Series represents a purpose-engineered line of sensor processing and signal conditioning modules deployed across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, and continuous-process chemical plants. The KL Series occupies a critical position in temperature measurement infrastructure, providing the signal chain between thermocouple/RTD field sensors and supervisory control systems (DCS/SCADA). Its modular architecture, DIN-rail mounting compatibility, and multi-sensor input flexibility have made it a standard specification in long-cycle industrial installations where replacement continuity is a primary procurement concern.

The Evolution of KL Series Architecture

The Anritsu KL Series was developed to address the signal integrity and multi-point temperature monitoring requirements of industrial process environments. Early-generation KL modules operated as standalone signal conditioners with analog 4–20 mA output, designed for direct integration with chart recorders and early PLC analog input cards. As industrial automation matured through the 1990s and 2000s, the KL Series evolved to support higher-density sensor arrays, improved cold junction compensation accuracy, and compatibility with RS-485 serial communication buses used in distributed monitoring networks.

The KL2300A represents the sensor processing unit tier of this series — a module responsible for acquiring thermocouple or RTD signals, performing linearization and cold junction compensation, and outputting a conditioned analog or digital signal to the host system. Compatibility considerations for KL Series modules include power supply rail voltage (typically 24 VDC), terminal block pitch, and the communication protocol of the host controller. Older KL modules may require signal isolators when integrated into modern DCS backplanes due to ground loop sensitivity. As the broader KL product line has entered its mature/end-of-life phase, long-term maintenance support and verified spare stock have become the primary procurement drivers for plant engineers.

KL Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Anritsu KL Series and associated sensor processing product range. Each entry reflects a distinct functional role within temperature measurement and signal conditioning systems:

KL2300A: Multi-channel sensor processing unit; thermocouple/RTD input, analog output
KL2100: Single-channel temperature transmitter; 4–20 mA loop-powered output
KL2200: Dual-channel signal conditioner; isolated analog output, DIN rail mount
KL2400: High-accuracy RTD processing unit; Pt100/Pt1000 input, ±0.1°C accuracy
KL2500: Multi-input scanner module; supports up to 8 thermocouple channels
KL2600: Digital output sensor processor; RS-485 Modbus RTU communication
KL2700: Isolated signal converter; thermocouple to 0–10 V DC output
KL3100: Temperature alarm module; dual setpoint relay output, SPDT contacts
KL3200: Multi-point temperature monitor; 16-channel input, panel-mount display
KL3300: Portable calibration reference unit; field verification of KL transmitters
KL4100: Power supply module; 24 VDC regulated, 2A, for KL series backplane
KL4200: Communication gateway; KL serial bus to Ethernet TCP/IP bridge
KL4300: Analog input expansion card; 8-channel, compatible with KL2500 scanner
KL5100: Cold junction compensation reference module; external CJC for precision apps
KL5200: Redundant sensor input module; automatic failover between primary/backup sensors
KL6100: Intrinsically safe barrier module; ATEX/IECEx rated, Zone 1/Zone 2 use
KL6200: High-temperature range processor; supports Type B/R/S thermocouples to 1800°C

Sourcing Hard-to-Find & Obsolete KL Series Parts

A significant portion of KL Series modules currently in service are no longer in active production. Anritsu has transitioned its temperature measurement product portfolio, leaving many KL Series SKUs in end-of-life status without direct OEM replacement paths. DriveKNMS maintains a dedicated inventory of verified KL Series spare modules sourced through authorized secondary market channels, decommissioned plant equipment, and long-term storage stock.

For plant operators running KL Series infrastructure in facilities with 10–30 year operational horizons — including nuclear, refinery, and continuous chemical process environments — DriveKNMS provides lifecycle extension support including: verified functional testing of pulled stock, cross-reference matching for discontinued part numbers, and supply of equivalent-specification replacement modules where direct SKU matches are unavailable. All sourced KL Series units are documented with traceability records to support plant maintenance audit requirements.

Quality Control for the KL Series Range

KL Series sensor processing modules involve precision analog signal chains where component degradation directly affects measurement accuracy and process safety. DriveKNMS applies a structured test protocol to all KL Series units prior to dispatch:

Input Signal Verification: Each unit is tested against calibrated thermocouple and RTD signal sources across the full specified input range. Output linearity is verified against the published accuracy specification.
Cold Junction Compensation Check: CJC circuit performance is validated at ambient temperatures of 15°C, 25°C, and 40°C to confirm compensation accuracy across operating conditions.
Analog Output Calibration: 4–20 mA and 0–10 V outputs are measured at 0%, 25%, 50%, 75%, and 100% of span using calibrated reference instruments.
Communication Interface Test: For RS-485 equipped models (e.g., KL2600, KL4200), Modbus RTU register read/write cycles are executed to confirm protocol integrity.
Isolation Resistance Test: Input-to-output and input-to-power isolation is verified per IEC 61010 requirements.
Burn-In Cycle: Units are powered continuously for a minimum of 24 hours under load prior to final inspection and packaging.