Description
Overview
The ABB IMDSI15 is a 16-channel digital input slave module designed for use in Bailey INFI 90, Net 90, and Symphony Harmony distributed control systems. It is engineered to collect discrete field signals and convert them into processed digital data for system-level monitoring and control.
This module is commonly applied in environments requiring fast, reliable, and electrically isolated signal acquisition under harsh industrial conditions.
Functional Role
The IMDSI15 acts as an interface between field devices and the INFI 90 system bus. It monitors 24 VDC or dry-contact input signals, conditions them through optical isolation, and transmits stable digital states to the control system.
Its high-speed response capability makes it suitable for interlocking logic, safety monitoring, and real-time process supervision.
Technical Specifications
| Parameter |
Specification |
| Brand |
ABB |
| Model |
IMDSI15 |
| Product Type |
Digital Input Slave Module |
| System Compatibility |
Bailey INFI 90 / Net 90 / Symphony Harmony |
| Input Channels |
16 Digital Inputs |
| Input Type |
24 VDC discrete or dry contact |
| Operating Voltage Range |
18–30 VDC |
| Input Current |
~7 mA per channel @ 24 VDC |
| Response Time |
≤ 5 ms |
| Isolation Type |
Optical isolation (channel-to-channel & system bus) |
| Protection Features |
Surge suppression, transient voltage protection |
| Backplane Power |
Supplied via INFI 90 rack |
| Diagnostic Indicators |
Front-panel LED status per channel + power LED |
| Communication Interface |
INFI 90 system bus |
| Operating Temperature |
0°C to +60°C |
| Storage Temperature |
-40°C to +85°C |
| Humidity Range |
5–95% RH non-condensing |
| Environmental Protection |
IP20 (module-level protection) |
| Dimensions |
178 × 51 × 228 mm |
| Weight |
0.5 kg |
| Mounting Type |
INFI 90 rack slot / Bailey module chassis |
System Integration
The IMDSI15 integrates directly into ABB INFI 90 architecture, enabling consistent digital input acquisition across distributed control environments. It communicates with system processors through the backplane, ensuring synchronized signal updates across control logic layers.
Industrial Applications
Typical use cases include:
-
Power plant control and monitoring systems
-
Petrochemical process automation
-
Industrial safety interlock systems
-
Manufacturing line control systems
-
Compressor and turbine monitoring
-
Distributed control system (DCS) maintenance and upgrades
Engineering Characteristics
The IMDSI15 is designed for high-noise electrical environments. Optical isolation protects system electronics from field-side disturbances, while fast input scanning ensures accurate detection of rapid signal transitions in critical control applications.
FAQ
What is the function of the IMDSI15 module?
The IMDSI15 collects and processes 16-channel digital input signals and transmits them to ABB INFI 90 control systems.
What types of inputs does it support?
It supports 24 VDC discrete signals and dry-contact inputs.
Is the module suitable for fast switching applications?
Yes. With response times up to 5 ms, it is suitable for interlocks and real-time monitoring.
Does it include diagnostic indicators?
Yes. Each channel has LED status indication along with a power status indicator.
