The Yokogawa ATK4A-00, also cataloged as the ATK4A KS Cable Interface Adapter, operates as a dedicated hardware component for high-density signal termination and cable interface conversion within Yokogawa CENTUM VP and CS 3000 DCS platforms. Mounting directly onto compatible analog I/O modules (such as AAI143, AAI135, AAI835, and AAP135 series), the unit converts internal module connectors into standardized KS multi-core cable interfaces for direct connection to AEA4D or AET4D terminal boards. This physical coupling eliminates point-to-point manual cabinet wiring while preserving channel assignment for 8-point and 16-point analog configurations.
| Suffix Code | Specification | Functional Description |
|---|---|---|
| ATK4A | Base Model | KS Cable Interface Adapter for Analog I/O Modules |
| -00 | Standard Option | Standard configuration for KS1/KS2 cable termination |
| Parameter | Specification |
|---|---|
| Model | ATK4A-00 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.20 kg net (1.20 kg shipping package) |
| Dimensions | 30 mm W x 100 mm H x 130 mm D |
| Operating Temp | 0 to +55 deg C |
| Power Consumption | Passive pass-through adapter (no internal power draw) |
| Connecting Points | 8-point or 16-point analog interface channels |
| Cable Compatibility | KS1 and KS2 multi-core interface cables |
| Module Compatibility | AAI143, AAI135, AAI835, AAP135 series |
| Terminal Board Compatibility | AEA4D, AET4D, and KS series terminal units |
| Ingress Protection | IP54 enclosure protection rating |
The ATK4A-00 adapter transfers 4-20 mA HART loop protocol carrier frequencies and high-frequency pulse inputs from field transmitters through dedicated multi-pin KS connectors without signal degradation. Internal pin traces maintain low loop resistance and high dielectric separation between adjacent channel lines, relying on the host I/O module and terminal boards for channel-to-channel isolation and galvanic protection. The unit incorporates grounding shield planes that route cable screen drains directly to functional chassis ground, suppressing external EMI and common-mode voltage noise across sensitive process loops.
Q: Does the ATK4A-00 cable interface adapter require independent DC auxiliary power connections?
A: No. The adapter operates strictly as a passive electrical interface and pass-through termination assembly, drawing no current from the backplane or external field supplies.
Q: Can the ATK4A-00 adapter be attached or detached while the host analog I/O module remains powered?
A: Hot-plugging the adapter is not recommended during active process operations. Field loops should be de-energized or switched to manual control prior to mating or unseating multi-core KS cable assemblies to prevent transient open-circuit trips.
Q: What prevents wiring inversion or incorrect pin alignment during KS cable insertion?
A: The integrated KS cable connector housing features keyed physical guide slots that enforce correct alignment and prevent inverted cable mating.
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