How Do I Configure Relay Switching Thresholds?

DALI relays can be configured with 4 thresholds that automatically turn the relay ON or OFF based on arc power level changes.  These thresholds can be found in the Device Types->Relay section.

The 4 Configurable Thresholds

When Arc Power Increases (Going Up)

• Up Switch ON: Relay turns ON when arc power reaches this level
• Up Switch OFF: Relay turns OFF when arc power reaches this level

When Arc Power Decreases (Going Down)

• Down Switch ON: Relay turns ON when arc power drops to this level
• Down Switch OFF: Relay turns OFF when arc power drops to this level

Threshold Value Rules

• Up thresholds: 1-254 (or 255 to disable)
• Down thresholds: 0-254 (or 255 to disable)
• Disabled: Set any threshold to 255 to ignore it

How It Works

The system checks thresholds whenever arc power changes:

• If arc power increases from 1 to 5, it checks all "up" thresholds at levels 2, 3, 4, and 5
• If arc power decreases from 5 to 1, it checks all "down" thresholds at levels 4, 3, 2, and 1

Default DALI Configuration

• Up Switch ON: 1 (relay turns on when any arc level above 0 is received)
• Down Switch OFF: 0 (relay turns off when arc power returns to 0)
• Up Switch OFF: 255 (disabled)
• Down Switch ON: 255 (disabled)

Result: Relay is ON for any arc level 1-254, OFF for arc level 0.

Example: Inverted Operation

Requirement: Relay should be ON when lights are OFF, and OFF when lights are ON (opposite of default).

Configuration:

• Up Switch ON: 255 (disabled - don't turn on when going higher)
• Down Switch OFF: 255 (disabled - don't turn off when going lower)
• Up Switch OFF: 1 (turn off when reaching arc level 1)
• Down Switch ON: 0 (turn on when dropping to arc level 0)

Result: Relay is ON only when arc power is 0, OFF for all other levels (1-254).

Example: High-Power Only Operation

Requirement: Relay should only be ON when arc power is 250 or higher.

Configuration:

• Up Switch ON: 250 (turn on when reaching 250)
• Down Switch OFF: 249 (turn off when dropping to 249 or below)
• Up Switch OFF: 255 (disabled - don't turn off when going higher)
• Down Switch ON: 255 (disabled - don't turn on when going lower)

Result: Relay is ON only when arc power is 250-254, OFF for all other levels.