3079B - Light / Dark Activated Switch With Hysteresis

This board uses an LDR and built-in hysterisis of the LM741 op-amp IC circuitry to eliminate the problem of relay chatter at the trigger threshold. This allows the switch to operate effectively where there is a gradual light change (i.e. dawn and dusk).

The Light/Dark mode switch is used to select either light or dark activation of the relay. This enables the unit to be operated in its low-current standby mode for the majority of the time according to your application.

• Adjustable turn-on sensitivity
• Switch to select either 'light' or 'dark' activation
• LED status indicator

Technical Specifications
Supply	Regulated 12Vdc (Order Code PSU446 with connector 778.106)
Current consumption	Light Activated: <1.5mA standby, <46mA relay active Dark Activated: <2mA standby, <45mA relay active
Output Type	1 x SPDT Relay
Maximum Output Load (Resistive)	Up to 240Vac or 28Vdc @ 2 Amps max. (Relay Datasheet)
Output Connections	NO, NC, C (Relay FAQ)
Board Dimensions	37x60mm
Board Connections	Screw terminal blocks
Product Formats	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual