ABB DI828 16-Channel 120V AC/DC Digital Input Module for S800 I/O

Product Overview

When reliable signal acquisition is critical in harsh industrial environments, the ABB DI828 digital input module delivers robust performance. This 16-channel module accepts 120V AC/DC inputs and features individually isolated channels, ensuring signal integrity and noise immunity. Part of the proven S800 I/O family, the DI828 is designed for demanding process control and factory automation systems.

Key Technical Specifications

The DI828 offers a wide input voltage range: for AC signals, the '0' state spans 0–30V and the '1' state covers 77–130V; for DC signals, '0' is 0–20V and '1' is 75–130V. Input impedance is 14.2 kΩ for AC and 50 kΩ for DC, with a typical input current of 8.5 mA at 120V AC and 2.4 mA at 120V DC. The module supports selectable digital filter times of 2.5, 5, 10, or 20 ms, and an analog filter with 5/10 ms on/off delay. Power dissipation is typically 3.5 W, and the +5V ModuleBus current consumption is 45 mA typical, 60 mA maximum. The rated insulation voltage is 250V, with a dielectric test voltage of 2000V AC.

Industry Applications

In manufacturing plants, the DI828 reliably monitors 120V AC/DC limit switches, push buttons, and proximity sensors. Its individually isolated channels prevent ground loops and cross-talk, making it ideal for motor control centers and conveyor systems. For power generation and water treatment facilities, the voltage supervision feature on channels 1 and 16 provides early warning of process voltage loss, reducing unplanned downtime.

Installation & Setup Guidance

Mount the DI828 securely in an S800 I/O rack using the compatible TU851 MTU. Connect field wiring to the MTU terminals, respecting the maximum cable length of 200 meters for AC and 600 meters for DC. Ensure the ambient temperature stays within 0 to +55°C (operating) and that the module is protected from condensation (relative humidity 5–95% non-condensing). Use the selectable digital filter to debounce noisy signals.

Maintenance & Reliability

The DI828 requires minimal routine maintenance. Periodically inspect the front panel LEDs—F (fault), R (run), W (warning), and channel indicators—to verify operational status. The module's IP20 protection class suits clean, dry control cabinets. Regular checks of the process voltage supervision and cable connections help maintain long-term reliability.

Compatibility & Integration

The DI828 integrates seamlessly with ABB S800 I/O systems via the ModuleBus interface. It is compatible with the TU851 keying code MTU and supports use with EB MTUs. The module is CE marked and complies with EN 61010-1, UL 61010-1, and marine certifications (ABS, BV, DNV, LR). For system integration, verify compatibility with your specific controller and I/O configuration.

Selection Guide & Purchasing Advice

Before ordering, confirm your system requires 16 individually isolated 120V AC/DC inputs. The DI828 is a current-sinking module with no HART, SOE, redundancy, or intrinsic safety features. For availability and lifecycle status, contact BluePLC Industrial—a trusted supplier of ABB automation parts. Ensure your MTU and power supply match the module's specifications for a smooth installation.