Rascal Handy little relays, timers, voltage boosters & isolation relays
Rascal Handy OPTO Isolating Relays
A superb range of handy relay modules for the professional engineer.
The Rascal Handy Relays boast “opto isolation” of input to output for added safety and to ensure circuits are truly electrically isolated.
There are 1, 2, 4, 8 and 16 way models so that you can pick the correct Rascal relay to suit your application for a neat and professional job.
Typical uses are for linking and controlling independent systems together such as CCTV, burglar or fire alarms, access control, gate automation, lighting and HVAC but they can be used in multiple ways by the professional installer.
Rascal Handy Delay On-Off Relay
Providing a perfect solution to delay the switch on or switch off of lights, door locks, bells, buzzers and so on, at such a low cost it's an absolute bargain for any professional installer's toolbox.
Rascal Handy 10 Function Relay
This versatile relay module has two independent timers built in to it so it can be set up to switch the relay contacts on and off in a variety of ways. With each timer being adjustable from 0.005s up to 270hrs (over 10 days!) it's a really versatile little rascal!! It has a total of 10 functions which include the useful delay on and delay off functions, perfect for sounders, gates, doors and lights.
Rascal Handy DC-DC Voltage Booster + Display
The Mini HRM402 Voltage Booster measures just 64mm x 35mm so it's tiny enough to fit in other equipment and actually contains a built in LED voltmeter. The output voltage can be turned up to 30V DC by simply turning a small adjuster on the PCB and by pressing a switch on the PCB you can oscillate between the input and output voltage so it’s very engineer friendly!
Which Handy Rascal module to choose?
1) Simple delay on or off after applying 12V power?
Want to delay something switching on or off after applying 12 volts? For this application choose the basic delay timer code HRM200. When you apply 12V to the HRM200, its relay contacts operate after an adjustable delay of between 0-20 seconds. The relay has both normally open contacts and normally closed contacts so the delay could be switching something either on or off. If you wish to trigger a delay with a short pulse say from a push button you will need a timer that has a trigger input, if that's your requirement have a look at HRM250 as this can be triggered via power on or trigger in.
2) Want to interface one system to another via a low or high trigger?
If you want to switch something ON or OFF and need to keep the trigger circuit isolated from what you are controlling then choose one of the Opto-Isolators HRM100-116. These superb handy Rascals have their inputs and outputs completely electrical isolated using “Opto-Isolators”.
Typically these would be used to interface low voltage systems from an alarm panel or access control system to a mains voltage device such as a light, garage door or similar. Installers frequently use them also to link 2 low voltage systems together, for example, intruder to access control, or an NVR/DVR to an alarm panel. You can trigger these with either a positive or negative signal for versatility and they’re available in 1,2,4,8 and 16CH versions.
3) Want a flexible ON or OFF delay after applying power OR an input trigger signal?
Choose the multi-function timer HRM250 for this. You can set this superb timer to be triggered for either seconds or up to 10 days!! To start the timer you can either simply apply power to it OR use a trigger signal to it, (the simple delay timer HRM200 is only triggered by applying power to it). The HRM250 has 18 functions built in to it that can be used to do a wide variety of control functions and with two separate and adjustable timers built into it, it caters for the professional installers’ needs. You can even create looped events for repeat triggering of sounders like the Voice OFF that carry on repeating, or time out after a number of “loops” you program into it. The non-volatile memory ensures that whatever you set it up to do it remembers that function after a power cut. This is the best choice for flexibly with items such as electric locks, mag locks, sirens etc.