The Beuler BU509TD is an upgraded time delay relay, perfect for situations where a device needs to remain powered for a set time after a button press or a trigger. With adjustable timing, it's ideal for applications like AC cooling fans, and headlight delayed off installations. Utilizing Bosch-style connections, it supports 30 amps of current, with low coil draw at 120mA. This SPDT relay is versatile, offering easy integration into automotive systems, ensuring reliable performance across multiple use cases.
Features:
Standard automotive style relay
No mounting tab
Delay Off Version
Momentary pulse to trigger latching (Requires the removal of 12 volts on the trigger to initiate timer, with constant 12 volts relay is latched like an ordinary 5-pin relay, no timer)
Low 1volt (1k Ohm) trigger voltage
Adjustable time latching from 2 seconds to 3 minutes with internal potentiometer, the time delay extends or delays the termination of the relay
Built in diode to stop timer feedback issues
Internal green LED to indicate status
Non-removable cap
20 amp / 30 amp rated contacts
SPDT - Single pole Dual throw
12 Vdc rated coil with minimum 8 volt to trigger
Power consumption @ 12Vdc 120 mA
Idle current draw 2 mA
Conventional 87, 87a, 30, 86, and 85 pin locations
SPDT Change Over NC/NO (form C)
Compatible with most insulated and non insulated terminals and relay sockets
Dimensions 1-1/4" (W) x 1-1/4" (D) x 2" (H) with terminals
Pin configuration:
Pin 30 - Must have constant or accessory 12 volts all-time, as this is what powers the circuit on the relay
Pin 85 - Ground
Pin 86 - Single pulse (+12 volts) to trigger time delay off (Constant 12 volts can be applied and once +12 volts is removed relay will stay latched for duration of timer.)
Pin 87a - +12 volt output (Normally closed contact - on except when time delay is active)
Pin 87 - +12 volt output (Normally open contact - on for duration of set time)
Uses:
Low voltage trigger: input will trigger with as little as 1 volt (Constant or pulsed)
Momentary pulse to timed latch: use a momentary switch to trigger for a short duration (up to 3 minutes)
Voltage inverter: temporarily reverse the polarity to a drain (requires additional relays
How the unit functions
Momentary pulse: 12 volt positive momentary pulse connected to Pin 86, once pulse goes to zero the relay will trigger for preset timing
Constant input: 12 volt positive constant connected to Pin 86, once constant goes goes to zero the relay will trigger for preset timing