Configured for discrete field-load switching in the ABB Advant S600 I/O system, the ABB 3BHT300009R1 (DO620 Digital Output Module) provides 32 isolated transistor output channels arranged in four groups. ABB documentation identifies the module as a 32-channel S600 digital output unit with outputs rated below 60 VDC and up to 0.5 A per channel.

Model Identification

The published ABB product data identifies DO620 as an S600 I/O digital output module with 32 channels, four opto-isolated groups, short-circuit-proof transistor outputs, and a maximum channel current of 0.5 A.

Industrial Control Interface

DO620 provides discrete transistor outputs between the S600 control system and connected field loads. The 32 channels are divided into four electrically isolated groups, with eight output channels assigned to each group. This grouping provides separation between field circuits while maintaining high output density.

For system integration, the module belongs to the S600 I/O family used with ABB Advant Controller platforms. ABB's Advant Controller 160 product documentation lists DO620 among the S600 digital output modules.

Ordering Information

• 1 x ABB DO620 Digital Output Module
• Part Number: 3BHT300009R1
• 1 x DO620 module assembly
• No additional termination unit, cable assembly, or installation kit is specified in the supplied product data.

Field Installation Guidelines

Module compatibility

• Verify that the target cabinet uses the ABB Advant S600 I/O architecture before installation.
• Confirm the module designation and part number against the existing hardware configuration.
• Do not substitute an S800 I/O module solely because the output channel count appears similar.

Field wiring

• Keep field output wiring separated from low-level analog signal wiring where practical.
• Use the specified field wiring and terminal arrangement for the installed S600 I/O assembly.
• Verify load voltage and current before connecting any field device.
• Do not exceed the stated 0.5 A maximum output current per channel.

Isolation and grounding

• Treat the four output groups as separately isolated field circuits.
• Maintain appropriate segregation between different field power domains.
• Connect cable shields according to the cabinet grounding design and avoid unintended shield-current paths.
• Inspect terminal connections for mechanical tightness before energizing the field circuits.

Maintenance

• Isolate field power before removing or installing the module unless the complete system documentation explicitly permits energized replacement.
• Check the associated I/O configuration after module replacement.
• Verify each output channel under controlled conditions before returning connected equipment to normal operation.

Frequently Asked Questions

• How many digital outputs does DO620 provide?

  DO620 provides 32 digital output channels. The channels are arranged as four opto-isolated groups, with eight channels assigned to each group.

• What is the maximum output current?

  The specified maximum output current is 0.5 A per channel. External loads must remain within the applicable electrical limits of the connected field circuit.

• What output voltage does DO620 support?

  ABB documentation specifies the output voltage as less than 60 VDC. The connected field supply must therefore be checked against the module specification.

• Are the output channels electrically isolated?

  The outputs are opto-isolated in four groups. Isolation is therefore organized by output group rather than as 32 individually isolated channels.

• What type of output switching device is used?

  DO620 uses transistor outputs. ABB specifies the transistor outputs as short-circuit proof within the defined operating conditions.

• How are the 32 channels grouped?

  The module contains four isolated groups, with eight digital output channels in each group. This arrangement separates field circuits into four output sections.

• Is DO620 part of the ABB S600 I/O family?

  Yes. DO620 is identified as an S600 I/O digital output module and is listed in ABB Advant Controller documentation under S600 digital output modules.

• What should be checked before replacing the module?

  Confirm the exact DO620 designation, 3BHT300009R1 part number, S600 rack compatibility, field voltage, output current, group wiring, and installed I/O configuration before replacement.