Yokogawa MAC2*A Multipoint Analog Control Card
The Yokogawa MAC2*A, also cataloged as the MAC2-A Multipoint Analog Control Card, operates as a dedicated hardware component for multi-loop continuous process control and analog signal conditioning within Yokogawa DCS and PLC control platforms. The card manages simultaneous input measurement acquisition and output loop execution for process variables including pressure, differential flow, and temperature without incurring control cycle delays on the main processor.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MAC2*A |
| Brand | Yokogawa |
| Part Number | MAC2-A |
| Origin | Japan |
| Weight | 0.70 kg (1.53 lbs) |
| Dimensions | Standard Yokogawa card rack dimensions |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | Standard backplane power allocation |
| Module Type | Multipoint Analog Control Card / VDC Logic I/O |
| Signal Processing | Multi-loop analog input acquisition and analog output control |
4-20 mA HART & Fieldbus Communication Protocols
The Yokogawa MAC2*A analog control card incorporates channel-to-channel isolation topology to isolate field-side 4-20 mA current loops from backplane logic circuitry, suppressing common-mode noise and ground loop potential differences. Onboard cold junction compensation (CJC) and analog-to-digital filtering ensure conversion accuracy across variable operating environments, while configurable PID control algorithms execute directly on the card processor to ensure high-speed, deterministic loop updates.
Frequently Asked Questions
Q: How are PID control loop parameters configured on the MAC2*A control card?
A: Control parameters, gain schedules, and loop configurations are programmed and downloaded directly to the module via standard Yokogawa system configuration software tools.
Q: What mechanism prevents field wiring faults from affecting adjacent control loops on the card?
A: Integrated channel-to-channel galvanic isolation isolates individual loop circuits, ensuring that an open or short circuit on one field instrument line does not degrade adjacent loop processing or backplane logic operations.
Field Installation Guidelines
- Confirm system backplane power is disconnected before seating the MAC2*A card into its target subrack slot to protect sensitive connector pins from electrical transient damage.
- Route analog input/output wiring through dedicated, grounded metallic conduits separate from high-voltage AC lines or variable frequency drive (VFD) output cables.
- Terminate signal cable shielding at a single grounding point on the control cabinet earthing bar, adhering to a minimum NPT thread engagement of 5 full turns for conduit entries in rated enclosures.
- Verify ambient enclosure temperatures remain within 0 deg C to +55 deg C and maintain unobstructed vertical airflow across the card chassis to permit standard thermal dissipation.
Yokogawa MAC2*A Multipoint Analog Control Card
Yokogawa MAC2*A Multipoint Analog Control Card
The Yokogawa MAC2*A, also cataloged as the MAC2-A Multipoint Analog Control Card, operates as a dedicated hardware component for multi-loop continuous process control and analog signal conditioning within Yokogawa DCS and PLC control platforms. The card manages simultaneous input measurement acquisition and output loop execution for process variables including pressure, differential flow, and temperature without incurring control cycle delays on the main processor.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MAC2*A |
| Brand | Yokogawa |
| Part Number | MAC2-A |
| Origin | Japan |
| Weight | 0.70 kg (1.53 lbs) |
| Dimensions | Standard Yokogawa card rack dimensions |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | Standard backplane power allocation |
| Module Type | Multipoint Analog Control Card / VDC Logic I/O |
| Signal Processing | Multi-loop analog input acquisition and analog output control |
4-20 mA HART & Fieldbus Communication Protocols
The Yokogawa MAC2*A analog control card incorporates channel-to-channel isolation topology to isolate field-side 4-20 mA current loops from backplane logic circuitry, suppressing common-mode noise and ground loop potential differences. Onboard cold junction compensation (CJC) and analog-to-digital filtering ensure conversion accuracy across variable operating environments, while configurable PID control algorithms execute directly on the card processor to ensure high-speed, deterministic loop updates.
Frequently Asked Questions
Q: How are PID control loop parameters configured on the MAC2*A control card?
A: Control parameters, gain schedules, and loop configurations are programmed and downloaded directly to the module via standard Yokogawa system configuration software tools.
Q: What mechanism prevents field wiring faults from affecting adjacent control loops on the card?
A: Integrated channel-to-channel galvanic isolation isolates individual loop circuits, ensuring that an open or short circuit on one field instrument line does not degrade adjacent loop processing or backplane logic operations.
Field Installation Guidelines
- Confirm system backplane power is disconnected before seating the MAC2*A card into its target subrack slot to protect sensitive connector pins from electrical transient damage.
- Route analog input/output wiring through dedicated, grounded metallic conduits separate from high-voltage AC lines or variable frequency drive (VFD) output cables.
- Terminate signal cable shielding at a single grounding point on the control cabinet earthing bar, adhering to a minimum NPT thread engagement of 5 full turns for conduit entries in rated enclosures.
- Verify ambient enclosure temperatures remain within 0 deg C to +55 deg C and maintain unobstructed vertical airflow across the card chassis to permit standard thermal dissipation.
