Reliable Signal Acquisition for Protection and Control Systems
The ABB DI685 3BDS005833R1 is a digital input module for high-integrity automation. This unit provides reliable acquisition of contact statuses from critical field devices. It integrates seamlessly into ABB’s S800 I/O series for distributed control applications. Consequently, it serves as a key component in protection, monitoring, and control systems.
Technical Specifications and Electrical Interface
This input module from ABB features multiple isolated channels for signal conditioning. Its design ensures accurate and fast detection of field contact states. Furthermore, the module connects directly to the ABB S800 I/O station bus for centralized data processing.
Detailed Technical Parameters
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model Number | DI685 3BDS005833R1 |
| Product Series | S800 I/O |
| Product Category | Digital Input Module |
| Number of Input Channels | 8 (typical for DI685 series) |
| Input Type | Contact Dry/Wet, Voltage Sensing |
| Nominal Input Voltage | 24/48/110/125 VDC, 110/125 VAC (range specific) |
| Operating Voltage Range | 0.7 to 1.5 times nominal voltage |
| Input Threshold (ON) | Typically > 60% of nominal voltage |
| Input Threshold (OFF) | Typically < 30% of nominal voltage |
| Input Current Consumption | ~2-10 mA per channel (voltage dependent) |
| Response Time | < 10 ms (typical, depends on filtering) |
| Channel Isolation | Yes, channel-to-channel and channel-to-system |
| Maximum Voltage Withstand | 2000 VAC for 1 minute (channel to logic) |
| Connection Type | Removable screw terminal block |
| Power Supply (Logic Side) | 5V DC from S800 station internal bus |
| Module Power Consumption | Typically 1.5W (logic and field combined) |
| 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 |
| Module Weight | Approximately 0.25 kg |
| Mounting | DIN Rail (35 mm) within S800 I/O station |
| Status Indicators | LED per channel for ON state |
| Internal Energy Storage | Filter capacitors only; no backup power |
| Certifications | Designed for industrial and electrical standards |
Key Features and System Integration
The DI685 module interfaces directly with switches, relays, and breaker auxiliary contacts. Its wide voltage range accommodates common control circuits in power and process industries. The module also provides electrical isolation to protect the control system from field disturbances. Moreover, its fast response time ensures timely detection of status changes for protection logic. Therefore, it is widely used in substation automation, turbine control, and safety systems.
Application Context and Wiring Configuration
Engineers use this module to monitor circuit breaker positions, valve limit switches, and alarm contacts. For example, it can detect the open/closed state of a motor-operated disconnector. The DI685 3BDS005833R1 typically connects to wet contacts (externally powered) for flexibility. Alternatively, it can interface with dry contacts when internal power is available. Thus, it supports various field wiring schemes without requiring additional signal converters.
Installation and Configuration Process
First, mount the module on the DIN rail inside an S800 I/O station. Next, connect the field device wires to the corresponding channel terminals. Then, configure the input filtering and debounce settings via the system’s engineering tool (e.g., ABB Control Builder). Finally, verify the signal mapping in the controller to ensure correct data point association.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 234 × 108 × 18 mm |
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