The ABB MAI32LAD, also cataloged as the MAI32LAD Analog Input Module, operates as a dedicated hardware component for multi-channel analog signal acquisition within ABB S800 I/O system architectures. Configured for high-density physical signal conversion, the module processes voltage inputs of +-10 VDC or 0-10 VDC, and current inputs of 0-20 mA or 4-20 mA with a 15 bits + sign analog-to-digital resolution across 32 channels.

Technical Identifier Matrix

Hardware Specifications

DCS Backplane Bus Velocity and I/O Density Scaling

The MAI32LAD integrates 32 high-resolution channels into a single S800 slot profile to optimize backplane physical space and I/O density. Utilizing an 8 ms scan update loop across all channels, the module processes high-density analog data without incurring backplane bus latency. Internal overvoltage suppression clamps transient surges up to +-35 VDC, protecting internal multiplexing networks and ensuring deterministic communication over the central S800 backplane bus.

Package Contents & Ordering Information

• 1x ABB MAI32LAD Analog Input Module
• 1x Installation Instruction Sheet

Field Installation Guidelines

• Module Mounting: Seat the MAI32LAD onto the compatible S800 Terminal Base Unit (TBU) until backplane retention latches lock fully.
• Power Connections: Connect nominal 24 VDC external supply wiring to the designated baseplate terminals, verifying correct polarity prior to power-up.
• Wiring & Signal Routing: Route 4-20 mA current loops and +-10 VDC signal cables in separate conduit runs away from high-voltage AC lines.
• Shielding & Grounding: Terminate overall field cable shields directly to the mounting rail or grounding bar using 360-deg braid clamps. Maintain system earth resistance below 100 ohms.

Frequently Asked Questions

• What signal input ranges are supported by the MAI32LAD module?

  The module processes +-10 VDC, 0-10 VDC, 0-20 mA, and 4-20 mA analog input signals across all 32 channels.

• What is the conversion resolution of the ABB MAI32LAD?

  Analog signal digitizing is performed at a resolution of 15 bits plus sign.

• How fast does the MAI32LAD scan all 32 input channels?

  The total update time for refreshing data across all 32 channels is 8 ms.

• What level of common-mode noise rejection does the unit provide?

  The module maintains a common-mode rejection ratio (CMRR) greater than 120 dB at 50/60 Hz.

• What is the overvoltage tolerance limit for the input channels?

  Each input channel is equipped with protection circuitry rated for continuous overvoltages up to +-35 VDC.

• What supply voltage is required to power the MAI32LAD module?

  The module operates from an external power supply source of 24 VDC.

• What is the ambient operating temperature range for the MAI32LAD?

  The unit is rated for operation in ambient temperatures from -25 deg C to +60 deg C.

• What shielding standard must be applied to field sensor wiring?

  Field wiring requires continuous shielded cable terminated via 360-deg braid grounding clamps with earth resistance under 100 ohms.