Product Details
The Yokogawa MAC2*A, also cataloged as the MAC2 Multipoint Analog Control Card, operates as a dedicated hardware component for multi-loop analog signal conditioning and process variable control within Yokogawa CENTUM DCS platforms.
Suffix Breakdown & Model Matrix
| Code Element | Specification / Description |
|---|---|
| MAC2 | Base model designation for multipoint analog control card series |
| *A | Style code Revision A specifying terminal interface layout and hardware revision |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MAC2*A |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.694 kg |
| Dimensions | Standard CENTUM nest card format |
| Operating Temp | 0 deg C to 50 deg C |
| Power Consumption | 24 VDC +/-10% |
| Product Type | Multipoint Analog I/O Control Card |
| System Compatibility | Yokogawa CENTUM DCS Series |
| Core Functionality | Independent multi-loop process control |
| Field Interface | System Bus Connector and M4 Screw Terminals (via nest) |
Channel-to-Channel Isolation and DCS Process Loop Control
The MAC2*A analog control card routes multiple independent process control loops across the CENTUM DCS system backplane. Designed with channel-to-channel isolation across signal lines, the module mitigates common-mode electrical noise and prevents ground potential loop currents between field transmitters and control logic. The hardware conditions 4-20 mA HART loop protocol signals and analog process inputs—such as temperature, flow, and pressure variables—translating physical field measurements into synchronized digital values for continuous DCS loop execution.
Frequently Asked Questions
Q: What physical interfaces handle system and field connections on the MAC2*A card?
A: Field signal wiring connects through M4 screw terminals on the mounting nest assembly, while system-level backplane communication is established through the integrated system bus connector.
Q: How does the MAC2*A card suppress electrical noise across adjacent analog control loops?
A: Galvanic channel-to-channel isolation barriers decouple individual control loop circuits, preventing ground potential differentials and cross-channel electrical interference.
Q: What is the input voltage tolerance for powering the MAC2*A module?
A: The card operates from a nominal 24 VDC power supply with an acceptable input voltage fluctuation range of +/-10% (21.6 VDC to 26.4 VDC).
Field Installation Guidelines
- Card Insertion: Slide the MAC2*A card along the guide rails of the designated CENTUM card nest slot. Seat the backplane bus connector firmly into the backplane socket and secure retaining fasteners.
- Terminal Termination: Connect field instrument wiring to the M4 screw terminals on the nest terminal block. Tighten terminal screws to standard engineering torque (0.8 to 1.2 N-m) to prevent loose contact under cabinet vibration.
- Shielding Practices: Ground signal cable shield drain wires at the cabinet functional earth (FE) bus bar at a single termination point. Do not connect shields to both the field device chassis and the DCS terminal block.
- Supply Voltage Check: Measure the 24 VDC power supply output under load to confirm voltage levels remain within the 21.6 VDC to 26.4 VDC range prior to loop commissioning.
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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