Digital Link Coupler

This bus coupler connects the Slice I/O system to the PiCPro® network over the Digital Link communications network. It mounts to a 35mm DIN rail and connects to up to 32 slices with up to 256 digital inputs, 256 digital outputs, 16 analog inputs and 16 analog outputs. The coupler itself includes 16 fast inputs (24 VDC), and 16 fast outputs (24 VDC).

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  • DIN rail mounting
  • Provides the interface between the Digital Link communications network and the Slice I/O Modules
  • Provides 16 fast inputs (24 VDC), and 16 fast outputs (24 VDC)
  • Supports up to 32 modular I/O slices, including:
    • Digital input modules (5, 12, 24, 48 VDC; 110, 220 VAC)
    • Digital output modules (5, 24, 120 VDC and Relay Out)
    • Analog input modules (0-20, 4-20 mA; 0-10, +/-10 VDC)
    • Analog output modules (0-20, 0-1,000 mA; 0-5, 0-10, +/-10VDC)
    • Power supply and distribution modules



Part number

AT2-R833, AT2-R834

Digital Link Ports

IEEE 802.3/802.3u-100Base-TXCable type: Shielded, Straight Pinned, CAT5 or better (CAT5e, CAT6, etc.)Maximum cable length: 30 M (98.4 ft)

System Power Input

24 VDC (nominal), 20 VDC to 30 VDC, .5A maximum

System Power Output

5 VDC (nominal), 1A maximum (to connected modules)

Field Power Input

24 VDC (nominal), 11 VDC to 28.8 VDC, 10A maximum (dependent on current used for connected I/O)

Operating temperature range

5°C to 55°C (41°F to 131°F)

Storage temperature range

-40°C to 85°C (-40°F to 185°F)


5 to 90%, non-condensing

Physical size

3.27" wide x 3.90" high x 2.76" deep (83 mm x 99 mm x 70 mm)


10-57 Hz (.012 in peak-to-peak) 57 - 500 Hz (acceleration = 2 g)



DC Inputs

Number of Inputs



AT2-R833: Sinking only; AT2-R834: Sourcing only

Input voltage

Nominal 24 VDC, maximum 28.8 VDC

Input current

4.5 mA at 24 VDC, typical

Guaranteed on voltage

AT2-R833: 11 VDC (minimum); AT2-R834: 5 VDC (maximum)

Guaranteed off voltage

AT2-R833: 5 VDC (maximum); AT2-R834: 11 VDC (minimum)

Turn on/off time

500 us

General DC Outputs

Number of outputs



AT2-R833: Sourcing only; AT2-R834: Sinking only

Operating voltage

Nominal 24 VDC (11 VDC Min, 28.8 VDC Max)

Protection of logic circuits

Optical isolation between the logic and field side

Maximum current

.5 A per output (8A total)

Switch characteristics

Solid-state switches

Time delay on for resistive loads

300 μsec max

Time delay off for resistive loads

300 μsec max

Leakage current in off state

50 uA max

Voltage drop (Output ON)

.3 VDC max

Over-current protection


Short circuit protection


Scan loss response

Outputs turn off

US Production