Product Details
The Yokogawa PAC*A, also cataloged as the PAC Programmable Automation Controller, operates as a dedicated hardware component for real-time logic execution and multi-channel signal processing within Yokogawa industrial automation platforms. The controller executes control routines across 16 digital inputs, 16 digital outputs, 8 analog inputs, and 8 analog outputs. Physical I/O channels accept digital 24 VDC logic levels and analog current or voltage ranges (0-10 V, 4-20 mA). Operating on a 24 VDC power supply drawing 500 mA, the hardware coordinates field device feedback with system scan cycles.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PAC*A |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.8 kg |
| Dimensions | 125 mm x 100 mm x 75 mm |
| Operating Temp | -20 deg C to 60 deg C |
| Power Consumption | 24 VDC, 500 mA (12 W nominal) |
| Digital Inputs / Outputs | 16 inputs (24 VDC) / 16 outputs (24 VDC) |
| Analog Inputs / Outputs | 8 inputs (0-10 V, 4-20 mA) / 8 outputs (0-10 V, 4-20 mA) |
| System Type | Programmable Automation Controller (PAC) |
4-20 mA Analog Loop Integration and Channel Isolation
The PAC*A processes analog signal loops operating on 0-10 V voltage levels and 4-20 mA HART loop protocol standards. The internal circuit architecture maintains galvanic channel-to-channel isolation across input and output arrays to prevent ground potential differentials from corrupting measurement values. Analog input stages integrate cold junction compensation (CJC) processing for temperature transducer interfaces, while digital output channels switch 24 VDC loads with short-circuit suppression circuitry to maintain signal stability during transient electrical events.
Frequently Asked Questions
Q: What is the nominal current draw of the PAC*A controller during full operation?
A: The controller consumes 500 mA at 24 VDC nominal operating voltage under full internal processing and channel initialization loads.
Q: How are the analog input channels configured on the PAC*A module?
A: The 8 analog input channels accept 4-20 mA current loops or 0-10 V voltage signals, using internal signal conditioning to switch between voltage measurement and current shunt modes based on terminal wiring.
Q: What electrical isolation is implemented between the field terminals and internal logic?
A: The module features internal galvanic isolation between field terminal connections, logic processing backplanes, and the primary 24 VDC power supply rail to suppress common-mode electrical noise.
Field Installation Guidelines
- DIN-Rail Mounting: Mount the PAC*A assembly securely onto a grounded 35 mm DIN-rail or chassis plate. Verify that the mechanical locking tabs engage fully.
- Wiring Separation: Separate 24 VDC power wiring and field I/O lines from high-voltage AC conductors in panel wire ducts to minimize electromagnetic interference.
- Shield Grounding: Connect analog signal cable shields (0-10 V, 4-20 mA) directly to the main cabinet functional earth (FE) ground bus bar at a single termination point.
- Power Verification: Confirm that the 24 VDC external power supply provides stable output voltage and delivers at least 500 mA continuous current before energizing the module.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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