ABB HENF Series Modules: HENF331270R0001 O4LCA

Technical Dossier

Product Details And Specifications

ABB HENF Series Technical Notes

The ABB HENF series represents a core family of I/O and communication modules deployed within ABB's Advant OCS / Master distributed control system (DCS) architecture. These modules have accumulated significant installed base across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, and large-scale chemical processing plants. The HENF series interfaces directly with the Advant Controller AC 450 and AC 410 platforms, providing deterministic process I/O, fieldbus communication, and supervisory data exchange. Due to the long operational lifecycles typical of DCS infrastructure — often 20 to 30 years — HENF modules remain in active service at facilities where full system migration is not economically viable. DriveKNMS maintains a dedicated inventory of HENF series modules to support these long-term operational requirements.

The Evolution of HENF Architecture

The HENF module family was introduced as part of ABB's Advant OCS platform in the late 1980s and expanded through the 1990s to address increasing demands for analog precision, digital I/O density, and fieldbus integration. Early HENF variants operated on the Advant Fieldbus 100 (AF 100) and RCOM serial communication backplane, providing deterministic scan cycles compatible with AC 450 controller racks. As industrial automation standards evolved, ABB introduced enhanced HENF variants with improved noise immunity, extended temperature ratings, and PROFIBUS-DP gateway capability. The series reached its production peak in the mid-1990s and entered the mature/end-of-life phase following ABB's transition to the System 800xA platform and the AC 800M controller family. Compatibility between HENF modules and newer ABB platforms is not native; migration requires dedicated gateway hardware or full I/O subsystem replacement. For facilities maintaining Advant OCS infrastructure, HENF modules are now exclusively sourced through the secondary market and specialist distributors. Long-term maintenance support — including functional testing, repair, and certified refurbishment — is the primary procurement model for this series.

HENF Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly traded HENF series modules. Each entry includes a concise functional description. Modules are classified by I/O type and communication function.

Analog Input Modules (AI)

• HENF331270R0001 O4LCA: Analog input module, 4-channel, 4–20 mA, 12-bit resolution, AF 100 backplane.
• HENF331270R0002: Analog input module, 4-channel, 0–10 V DC, high-impedance input, AF 100.
• HENF331270R0003: Analog input module, 8-channel, thermocouple/RTD, cold junction compensation.
• HENF331270R0004: Analog input module, 4-channel, HART-compatible, 4–20 mA loop-powered.
• HENF331270R0005: Analog input module, 4-channel, millivolt range, high-resolution 14-bit ADC.

Analog Output Modules (AO)

• HENF331280R0001: Analog output module, 4-channel, 4–20 mA, 12-bit DAC, short-circuit protected.
• HENF331280R0002: Analog output module, 4-channel, 0–10 V DC, buffered output, AF 100 bus.
• HENF331280R0003: Analog output module, 2-channel, high-current 0–20 mA, isolated outputs.

Digital Input Modules (DI)

• HENF331290R0001: Digital input module, 16-channel, 24 V DC, sink/source configurable, AF 100.
• HENF331290R0002: Digital input module, 32-channel, 24 V DC, high-density, grouped commons.
• HENF331290R0003: Digital input module, 16-channel, 120 V AC, optically isolated, DIN rail mount.

Digital Output Modules (DO)

• HENF331300R0001: Digital output module, 16-channel, 24 V DC, 0.5 A per channel, short-circuit protection.
• HENF331300R0002: Digital output module, 8-channel, relay contact, 2 A/250 V AC, SPDT configuration.
• HENF331300R0003: Digital output module, 32-channel, 24 V DC, transistor output, grouped commons.

Communication & CPU Modules

• HENF331310R0001: PROFIBUS-DP master communication module, AF 100 to PROFIBUS gateway, 12 Mbit/s.
• HENF331320R0001: Advant Fieldbus 100 (AF 100) bus interface module, redundant media support.
• HENF331330R0001: RCOM serial communication module, RS-232/RS-485, Modbus RTU protocol support.