Yokogawa K9634DA-01 TCD Card Modules

Technical Dossier

Product Details And Specifications

Yokogawa K9634DA Series Technical Notes

The Yokogawa K9634DA series TCD (Thermocouple/mV Input) cards are field-proven I/O modules deployed across global heavy industry installations, including petrochemical complexes, nuclear power facilities, oil refineries, and large-scale chemical processing plants. Operating within the Yokogawa CENTUM CS 3000 and CENTUM VP distributed control system (DCS) architectures, the K9634DA series provides high-density thermocouple and millivolt analog input capability with cold junction compensation and hardware-level signal conditioning. These modules are integral to process temperature measurement loops where accuracy, redundancy, and long-term stability are non-negotiable operational requirements. The K9634DA-01 variant specifically supports 16-channel thermocouple input with isolated signal processing, making it one of the most widely installed analog input cards across CENTUM-based facilities commissioned between the late 1990s and 2010s.

The Evolution of K9634DA Architecture

The K9634DA series was introduced as part of Yokogawa's CENTUM CS 3000 platform, which succeeded the earlier CENTUM-XL and CENTUM CS systems. The architectural transition from CENTUM-XL to CS 3000 brought a shift from proprietary backplane bus protocols to a more modular, Vnet/IP-compatible field control station (FCS) design. The K9634DA cards were engineered to slot into the CS 3000 node unit (NU) and field control unit (FCU) chassis, communicating over the internal ESB (Expanded Signal Bus) backplane.

Compatibility note: K9634DA modules require correct ESB slot addressing and are not hot-swappable without FCS configuration backup. Firmware compatibility must be verified against the FCS CPU revision before installation.

K9634DA Full Catalog & Functionalities (SKU List)

Thermocouple / mV Analog Input Modules

• K9634DA-01: 16-ch thermocouple/mV input card, cold junction compensation, ESB bus interface
• K9634DA-02: 16-ch thermocouple input, extended temperature range variant, enhanced CJC accuracy
• K9634DA-11: 8-ch isolated thermocouple input, individual channel isolation, high-noise environment rated
• K9634DA-12: 8-ch isolated mV input, precision low-level signal acquisition, galvanic isolation per channel
• K9634DA-21: 16-ch thermocouple input with HART-compatible signal path, CS 3000 R3 and above
• K9634DA-31: Redundant 16-ch thermocouple input module, dual-path signal processing for SIL-rated loops

RTD / Resistance Analog Input Modules (K9634 Family)

• K9634RA-01: 16-ch RTD/resistance input card, 2/3/4-wire configuration, Pt100/Pt1000 compatible
• K9634RA-11: 8-ch isolated RTD input, per-channel isolation, suitable for high-potential difference environments

Analog Output Modules (K9634 Family)

• K9634AO-01: 8-ch 4–20 mA analog output, ESB bus, loop-powered field device drive
• K9634AO-11: 8-ch isolated analog output, individual channel isolation, HART-capable variant

Digital Input Modules (K9634 Family)

• K9634DI-01: 32-ch 24 VDC digital input, ESB bus, contact/transistor input compatible
• K9634DI-11: 16-ch isolated digital input, 110/220 VAC input rated, high-voltage field interface

Digital Output Modules (K9634 Family)

• K9634DO-01: 16-ch 24 VDC digital output, transistor sink type, ESB bus interface
• K9634DO-11: 16-ch relay output, SPDT contacts, 250 VAC rated, mechanical relay type

Communication & CPU Modules (K9634 / CS 3000 FCS Family)

• K9634CP-01: FCS CPU module, CS 3000 field control station processor, Vnet interface
• K9634PS-01: FCS power supply module, 24 VDC output, redundant pair capable
• K9634PS-11: Redundant power supply module, hot-swap capable, FCS chassis compatible

Quality Control for the K9634DA Range

The K9634DA series presents specific quality verification challenges due to its multi-layer PCB construction, ESB backplane connector wear patterns, and analog front-end sensitivity to electrostatic discharge during handling. DriveKNMS applies a structured test protocol to all K9634DA units prior to dispatch.