Relay Bank

Channel Interlock

Configure Channel Interlock in HPzenAi Smart. Prevents conflicting relay channels from running together.

What it does

Never let two channels run together.

Prevents conflicting relay channels from running together. Use this automation when the selected field devices should work together without repeated manual setup.

CategoryRelay Bank

Works with

Relay ControllersMotor ControllersValves

Automation Logic

When

Trigger

A relay channel is requested to turn on.

Default

A channel turns on

Choices

A channel turns on

Example: choose "A channel turns on" for the default when behavior.

If

Condition

A conflicting channel is already on or requested.

Default

No condition

Choices

No condition

Example: leave No condition selected when the trigger alone should run the workflow.

Then

Action

Block the new command or turn off the conflicting channel based on configuration.

Default

Turn the paired channel off

Choices

Turn the paired channel offTurn the paired channel off and notify meOnly notify me

Example: choose "Turn the paired channel off" for the default then behavior.

Active

Allowed Time

Use All day for relay safety.

Default

All day

Choices

All dayDay (6 AM - 6 PM)Night (6 PM - 6 AM)

Example: keep All day for protection workflows, or choose Day or Night when operation should stay inside site hours.

Automation Details

Recommended use

Forward/reverse control, alternate valves, and loads that must never overlap.

Device Inputs

Relay Controllers, Motor Controllers, Valves

Output Behavior

Block the new command or turn off the conflicting channel based on configuration.

Safety Note

Review wiring and load behavior before relying on an interlock.

Test Method

Attempt both conflicting channels under supervision and confirm only the allowed channel runs.

Visual reference coming soon

Future screenshot area for the Channel Interlock setup screen and saved Smart card.

Channel Interlock Walkthrough

Walkthrough video coming soon

Before You Start

Device Readiness

Link every device used by this workflow and confirm each one is online.

Device Selection

Choose the exact tank, pump, valve, relay, or meter that should be controlled.

Safe Test

Test with safe thresholds or manual observation before leaving the workflow enabled.

Guided Setup

Set Up Channel Interlock

Step 1 / 12

9:41

1

Open the HPzenAi app.

Step 1 / 12

Commissioning Checks

• Confirm the selected relay channel changes state at the expected time or condition.
• Attempt both conflicting channels under supervision and confirm only the allowed channel runs.
• Confirm the saved card shows the correct workflow, devices, schedule, and enabled state.
• Review the event history after testing so the action is recorded as expected.
• Keep safety-critical workflows active all day unless the site needs a specific time window.

Troubleshooting

• If the Save button is disabled, complete every required trigger, condition, action, and timing field.
• If the workflow does not run, confirm the devices are online and the active time allows it to run now.
• If the action does not complete, check whether the target device is already in that state or cannot accept commands.
• If notification behavior is missing, confirm phone notification permission and recent device data.

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