Efficient High-Density Signal Acquisition for Control Systems
The ABB DI811 3BSE008552R1 is a high-density digital input module for automation. This module reliably acquires contact statuses from sixteen independent field devices. It integrates directly into the versatile S800 I/O series for distributed control architectures. Consequently, it provides an efficient solution for monitoring numerous discrete signals.
Technical Specifications and Electrical Characteristics
This input module from ABB is specifically designed for 48 VDC signal systems. Its design organizes the sixteen channels into two isolated groups of eight. Furthermore, the module features a high input impedance to minimize current draw from field circuits.
Detailed Technical Parameters
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model Number | DI811 3BSE008552R1 |
| Product Series | S800 I/O |
| Product Category | Digital Input Module |
| Number of Input Channels | 16 |
| Input Signal Specification | 48 VDC (Nominal) |
| Input Group Configuration | 2 Groups of 8 Channels (Groupwise Isolation) |
| Input Impedance | 11 kΩ (per channel) |
| Input Current per Channel | Approximately 4.4 mA (at 48 VDC, 11 kΩ) |
| ON Voltage Threshold | Typically > 60% of nominal voltage (~29 VDC) |
| OFF Voltage Threshold | Typically < 30% of nominal voltage (~14 VDC) |
| Response Time | < 10 ms (typical, depends on filtering settings) |
| Isolation Specification | Groupwise isolated from ground |
| Isolation Voltage | 500 VAC (typical between group and logic) |
| Maximum Input Voltage | Continuous: 60 VDC; Withstand: Higher surge rating |
| Connection Interface | Removable screw terminal block |
| Logic Side Power Supply | 5V DC from S800 station internal bus |
| Module Power Consumption | Typically 1.8W (combined field sensing and logic) |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Module Dimensions (H x W x D) | Approx. 125 mm x 25 mm x 110 mm (S800 standard) |
| Module Weight | Approximately 0.28 kg |
| Mounting | DIN Rail (35 mm) within an S800 I/O station |
| Status Indicators | LED per channel for input state (ON/OFF) |
| Internal Energy Storage | Filter capacitors for signal conditioning only |
| Diagnostic Features | Channel status available via station communication |
Key Features and System Integration Benefits
The DI811 module efficiently monitors a large number of field contacts within a compact footprint. Its groupwise isolation simplifies wiring and enhances system noise immunity. The high 11 kΩ input impedance places minimal load on the external 48VDC source. Moreover, the module’s fast response ensures timely updates for control and logging functions. Therefore, it is ideal for applications in manufacturing, material handling, and process control with many binary sensors.
Application Context and Typical Wiring
Engineers typically use this module to monitor limit switches, push buttons, relay contacts, and proximity sensors. For instance, it can track the position of multiple doors on an automated assembly line. The DI811 3BSE008552R1 connects to wet contacts, requiring an external 48VDC supply for the field circuit. Proper grouping of signals helps manage wiring and troubleshoot potential ground faults.
Installation and Configuration Process
First, mount the module on a DIN rail inside a compatible S800 I/O station enclosure. Next, connect the field device wires and the common 48VDC supply to the terminal blocks, respecting the group separation. Then, configure any input filtering or debounce parameters using ABB’s engineering software (e.g., Control Builder). Finally, verify the mapping of each channel’s status bit in the controller’s data table for correct system operation.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 234 × 108 × 18 mm |
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