Entrotec's RH3+ handset allows you to repair and maintain other manufacturers' door entry systems.


The RH3+ handset offers the following features:

• Call tone amplifier for systems with electronic call tones or AC buzz tone.
• Adjustable volume call tone
• Piezo buzzer for DC or AC call voltage signal
• Latching Privacy feature for both call tone amp and piezo buzzer
• Piezo buzzer can be used as an independent second sounder, over-riding the call tone amplifier if both operating (Alarm mode)
• Positive or negative going door status indicator
• Anti-lockdown circuit with over-ride


RH3+ Technical Specification


• DR Door Release. A negative going voltage level to trigger the system's lock control circuit.
• VT 12VDC supply to the handset for LED and call tone functions.
• 0V 0VDC supply to the handset.
• BZ Call tone input. Either AC or DC based tones are amplified and heard through the handset when on-hook.
• S2 Microphone signal from handset. 2.5 volt circuit at 150 ohms.
• S1 Signal to handset speaker. Rated at 32 Ohms at a ½ Watt.
• DS Door status LED. Operates from a high level going low or low level going high.
• EX Extension sounder or flashing beacon output and is relative to the call tone input i.e. negative or positive with corresponding DC or AC input.
• CB Connection to additional switch (where fitted), pulls to 0V when activated.
• X Alarm input (Apex system)
• ALM Connection to piezo buzzer, apply 11-15V to activate.

Jumper links:

• LK7&LK10 Call tone / piezo buzzer select
• LK6 Anti-lockdown circuit (Door Release outputs a 500 ms negative going trigger) / over-ride select
• PL5 BZ input DC blocking (reduces on-site electrical interference)
• PL3 Positive/negative going Door Status select

RH3+ Datasheet RH3+ Datasheet (426 KB)

RH3+ConversionChart RH3+ConversionChart (58 KB)

Click here to see all our available downloads


why choose us

We listen to the needs of our clients. We can support the process from start to finish and ensure that your property whether residential or corporate building has the right, cost effective door entry solution with guarantees of quality that are incomparable in the market.

If you own or are involved with the management, construction or maintenance of multi-occupancy buildings then Entrotec is able to design and facilitate a total security solution that will protect you, your residents and your property. We source from local suppliers and are proud to manufacture our systems at our UK head office in Livingston.