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Digital I/O modules

Versatile modules for digital signals in hazardous locations
The digital I/O modules (DIOM) are suitable for connecting up to 16 intrinsically safe digital signals. The channels can be used in pairs as inputs for contacts or proximity switches, or as outputs for low-power solenoid valves or pilot lights. In addition, frequency/counter inputs are available with or without rotation direction recognition.

The digital I/O modules (DIOM) can be used to connect up to 16 intrinsically safe digital signals. All channels can be used in pairs as inputs for passive contacts or NAMUR proximity switches (EN 60947-5-6) or as outputs for low-power solenoid valves or I.S. pilot lights.

Up to eight inputs can be used as frequency inputs/counters up to 20 kHz, and up to four inputs can be used in the "Rotation direction recognition" and "Forwards/backwards counter" operating modes. The I.S. inputs/outputs are short-circuit proof and galvanically isolated from the system.

A blue LED and diagnostic messages provide early warnings that maintenance is required in order to avoid system downtime.
The Zone 1 and Class I Div.1 versions have additional LEDs for each channel to indicate any line faults and the switching state.

  • *Versatile: Channels can be used in pairs as input or output
  • Versions with Ex ia intrinsically safe inputs/outputs for installation in Zone 1, 2 and Class I Div.1, 2
  • Hot-swappable: Can be replaced while the system is in operation in explosive atmospheres

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Class1 Division and Zone
Application range (zones)
Ex interface zone
Max. Voltage Uo
Max. Current Io
Max. power Po
Channel status LEDs

5 Series (6 Products)

Explosion Protection
Ex Digital Input Output Module for Zone 1 / CIass I, Div. 1 Series 9470/32 R. STAHL

Digital Input Output Module for Zone 1 / CIass I, Div. 1 Series 9470/32

  • 16 channels can be used in pairs as inputs or outputs
  • Intrinsically safe Ex ia inputs/outputs with line fault monitoring
  • Module in Zone 1 and Class I, Div. 1 can be replaced during operation (hot swap)
Explosion Protection
Ex Digital Input Output Module for Zone 2 / CIass I, Div. 2 Series 9470/33 R. STAHL

Digital Input Output Module for Zone 2 / CIass I, Div. 2 Series 9470/33

  • 16 channels can be used in pairs as inputs or outputs
  • Intrinsically safe Ex ia inputs/outputs with line fault monitoring
  • Module in Zone 2 and Class I, Div. 2 can be replaced during operation (hot swap)
Explosion Protection
Ex Digital Input Output Module NAMUR for Zone 2 / CIass I, Div. 2 nonincendive Series 9471/35 R. STAHL

Digital Input Output Module NAMUR for Zone 2 / CIass I, Div. 2 nonincendive Series 9471/35

  • 16 channels can be used in pairs as inputs or outputs
  • Inputs/outputs Ex ec with line fault monitoring and LED error and status indication for each channel
  • Module in Zone 2 and Class I, Div. 2 can be replaced during operation (hot swap)
Explosion Protection
Primary Image 9472/35

Digital Input Output Module 24 V for Zone 2 / CIass I, Div. 2 nonincendive Series 9472/35

  • 16 channels can be used in pairs as inputs or outputs (24 V / 0.5 A)
  • Inputs/outputs Ex ec with line fault monitoring and LED error and status indication for each channel plus SIL 2 plant-stop input
  • Module in Zone 2 and Class I, Div. 2 can be replaced during operation (hot swap)
Explosion Protection
Ex Digital Input Module NAMUR Ex i / I.S. Inputs, 16 Channels for Zone 1 / Div. 1 Series 9470/22 R. STAHL

Digital Input Module NAMUR Ex i / I.S. Inputs, 16 Channels for Zone 1 / Div. 1 Series 9470/22

  • Sixteen channels for contacts and NAMUR proximity sensors – can also be used for frequencies
  • Intrinsically safe Ex ia IIC inputs with line fault monitoring
  • Module in Zone 1 can be hot swapped

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