Phoenix Contact IB ST 24 DO 32/2 Industrial Control System I/O MODULE IDENT 189
 2754325
The IB ST 24 DO 32/2 is a digital output module from Phoenix Contact’s INLINE family of industrial control and automation systems. Its primary function is to act as an interface between a higher-level controller (like a PLC) and field devices, allowing the controller to switch high-power loads (like valves, motors, contactors, or indicators) on and off.
The key identifiers in the name break down as follows:
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IB ST:Â INLINE Bus Terminal (the base station module)
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24 DO:Â 24V DC Digital Output
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32/2:Â 32 channels, organized in groups of 2 (for diagnostic and fuse purposes)
Key Features and Specifications
| Feature | Specification |
|---|---|
| Product Type | Digital Output Module |
| System | Phoenix Contact INLINE / PC Worx / PLCnext |
| Number of Channels | 32 |
| Output Type | Semiconductor (MOSFET), P-switching (sourcing) |
| Rated Load Voltage | 24 V DC |
| Output Current per Channel | 0.5 A |
| Total Current per Group | 2 A (for 4 channels) |
| Total Current per Module | 16 A |
| Short-Circuit Protection | Yes, electronic per channel group |
| Diagnostics | Yes, per channel group (e.g., short-circuit, wire break) |
| Connection Technology | Spring-force (push-in) or screw connection |
| Bus Connection | Integrated into the INLINE backplane bus |
| Module Identifier (ID 189) | A unique code used by the engineering software (e.g., PC Worx) to automatically identify and configure the module in the hardware configuration. |
Detailed Product Description
1. Function and Purpose:
This module is a workhorse for controlling a large number of on/off devices in an industrial setting. It receives commands via the high-speed INLINE fieldbus backplane from a central controller. It then uses its 32 independent output channels to switch 24V DC power to the connected field devices.
2. Channel Configuration (The “32/2” Logic):
The 32 outputs are not individually fused but are organized into 16 groups of 2 channels each. Each group of two channels shares a common diagnostic feature and a common electronic short-circuit protection. This means if a short-circuit occurs on one channel in a group, both channels in that pair will be de-energized and a diagnostic error will be reported.
3. Diagnostic Capabilities:
This is a critical feature for robust industrial systems. The module can detect and report faults to the controller for each channel group, including:
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Short-circuit to ground
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Wire break / Load voltage missing
This allows for quick troubleshooting and minimizes machine downtime.
4. Physical Design and Integration:
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INLINE System:Â The module mounts seamlessly onto a standard DIN rail and snaps onto the INLINE terminal block. It becomes part of a modular I/O station that can include power supplies, controllers, and various other digital/analog I/O modules.
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Connections:Â The field wiring (to your sensors/actuators) is connected to the removable terminal blocks at the front. The bus connection to the controller is automatic via the backplane bus, requiring no additional cabling.
5. Module Identifier (ID 189):
The “IDENT 189” is an internal product code. When you are configuring your system in Phoenix Contact’s engineering software (like PC Worx or PLCnext Engineer), you select this module from a hardware catalog. The software uses this ID to know it is dealing with a “32-channel, 24V DC digital output module” and automatically applies the correct configuration and data structure for it in the controller’s program.
Typical Applications
This module is used in industries and applications requiring a high density of digital outputs, such as:
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Automated Assembly Lines
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Packaging Machinery
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Material Handling Systems (Conveyors)
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Automotive Manufacturing
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Process Automation
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Any control cabinet requiring the control of numerous solenoids, relays, indicator lamps, or motor starters.
