Description
Overview
The ABB IMDS122 is a 16-channel digital signal acquisition module developed for Bailey INFI 90 and Net 90 distributed control architectures. It is designed to interface field-level digital devices with ABB control processors, converting discrete input states into reliable system-readable signals.
The module is commonly deployed in environments requiring fast switching detection, stable signal conditioning, and robust electrical isolation under industrial operating conditions.
Functional Role
The IMDS122 continuously monitors multiple digital input points from field devices such as switches, relay contacts, and logic outputs. It processes these signals and transmits standardized input data to INFI 90 system controllers for real-time control and monitoring.
It is optimized for applications where consistent response time and signal integrity are critical.
Technical Specifications
| Parameter |
Specification |
| Brand |
ABB |
| Model |
IMDS122 |
| Product Type |
Digital Input Module |
| System Compatibility |
Bailey INFI 90 / Net 90 |
| Input Channels |
16 Digital Inputs |
| Input Signal Types |
Dry contact, transistor logic |
| Input Voltage (Typical) |
24 VDC system level |
| Response Time |
≤ 10 ms |
| Power Consumption |
~1.5 W (low-power variant reference) |
| Communication Interface |
INFI 90 system bus |
| Optional Protocol Support |
Modbus RTU (application-dependent) |
| Isolation |
Electrical isolation between channels and system bus |
| Noise Immunity |
Industrial-grade EMI/EMC protection |
| Operating Temperature |
-20°C to +70°C |
| Storage Temperature |
-40°C to +85°C |
| Humidity Range |
5–95% RH non-condensing |
| Mounting Type |
DIN rail / rack-mounted (configuration dependent) |
| Physical Dimensions |
120 × 150 × 80 mm |
| Weight |
0.45 kg |
System Integration
The IMDS122 integrates directly into ABB INFI 90 control environments, providing standardized digital input handling for system processors. It is compatible with distributed control communication structures and supports consistent signal exchange across automation subsystems.
Industrial Applications
This module is typically used in:
-
Power plant monitoring systems
-
Petrochemical process control networks
-
Manufacturing automation lines
-
Utility and energy management systems
-
Industrial safety interlock circuits
-
Legacy ABB INFI 90 system maintenance
Engineering Characteristics
The IMDS122 is engineered for stable performance in electrically noisy environments. Its isolation architecture reduces signal interference, while its fast response time ensures accurate detection of rapid input transitions in control applications.
FAQ
What is the main function of the IMDS122?
The IMDS122 is used to acquire and process digital input signals from field devices in ABB INFI 90 systems.
How many inputs does it support?
It provides 16 independent digital input channels.
What types of signals are supported?
It supports dry contact inputs and transistor-based logic signals.
Is it suitable for harsh environments?
Yes. It is designed for industrial environments with wide temperature tolerance and strong EMI protection.
