The IB STME 24 DI 322 is a 32-channel digital input module. This means it can monitor the ON/OFF status of 32 separate devices simultaneously. Examples include:
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Push buttons
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Limit switches
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Proximity sensors (PNP)
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Relay contacts
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Photoelectric sensors
It converts these physical on/off signals into digital data that can be read and processed by the Interbus master controller.
2. Key Features
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High Channel Density: With 32 inputs in a single module, it saves space in the control cabinet, reducing the need for multiple modules.
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24V DC Input Standard: This is the industrial standard voltage for sensors and switches, ensuring broad compatibility.
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Electrical Isolation: The module provides galvanic isolation (typically 500V) between the Interbus system and the connected field devices. This is a critical safety feature that protects the sensitive control system from voltage spikes or faults on the factory floor.
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Diagnostic LEDs:
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“F” (Fault) LED: Indicates a module error or a fault on the bus.
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“OP” (Operational) LED: Shows the module is powered and communicating correctly on the bus.
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32 Input LEDs (one per channel): A green LED for each channel lights up when the corresponding input signal is active (24V present). This makes troubleshooting and commissioning very easy.
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Interbus System Integration: It plugs directly into the Interbus remote bus segment, communicating reliably and deterministically with the master controller.
3. Technical Specifications (Summary)
| Parameter | Specification |
|---|---|
| Article Number / Order Number | 2754985 |
| Product Family | Interbus |
| Module Type | Digital Input (DI) |
| Number of Channels | 32 |
| Input Voltage | 24 V DC (Nominal) |
| Input Current | Typically 3 mA per input (at 24V) |
| Logic Level “1” (ON) | +15 V to +30 V DC |
| Logic Level “0” (OFF) | -30 V to +5 V DC |
| Electrical Isolation | Yes (500 V between Bus and Field) |
| Connection Method | Screw Clamp (via a removable front connector) |
| Protocol / System | Interbus |
| Mounting | On a standard 35 mm DIN Rail |
4. Physical Identification and Labeling
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“IB STME 24 DI 322”: This is the product designation printed on the module.
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IB: Interbus
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ST: Terminal module (for remote bus)
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ME: With front connector
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24: 24V DC
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DI: Digital Input
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322: 32 channels, 2-byte process data structure
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“2754985”: This is the unique Phoenix Contact order number printed on the side label. This is the most important number for ordering and finding technical documentation.
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“INDENT 190”: This is an internal Phoenix Contact manufacturing or product series identifier. For the end-user, the Order Number is the key identifier.
