Tiny Size

The tiny PCB designs of this relay, timer and opto-isolator range make them perfect for building into other equipment.

Handy Little Relay Modules

An absolute toolbox essential for alarm, CCTV, security, access control engineers and electrical contractors.

Low Cost Solution

Ideal for interfacing different systems together such as gates, access control, lighting, burglar alarms and CCTV.

Voltage Booster Relays

Boosts up to 30V DC and features a built-in voltmeter and handy LED display for reading the input or output.

Timer Relays in 2 designs

Choose from the simple delay On-Off (HRM200) model or the more adavanced 10 function model (HRM250).

Opto Isolators 1,2,4,8,16ch

Triggering with a 0V or 12V, can be used trigger devices such as gates, access control, lighting, alarms and CCTV

Handy Rascal ® Relay Modules

Brought to you by System Q Ltd - a Great British company with over 25 years of history in the CCTV industry. Established 1994.

Download Info Pack

Handy Rascal ® Relays

Perfect for linking and controlling independent equipment such as alarms, CCTV, access control and more!

An essential range for the professional engineer's toolbox.


The Mini HRM402 Voltage Booster 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!

Model: HRM402 Rascal DC-DC Volt Booster & Display

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 its an absolute bargain for any professional installers toolbox.

Model: HRM200 Handy Rascal Delay ON-OFF 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!).

Model: HRM250 Rascal Multi Function Relay

The Handy Rascal Relays boast “opto isolation” of input to output for added safety and to ensure circuits are truly electrically isolated.

Model: HRM100 (1ch), HRM102 (2ch), HRM104 (4ch), HRM108 (8ch), HRM116 (16ch) Rascal Opto Isolators