Genesis Receivers & Control Units


The Masthead Receiver forms the core of a Genesis wireless system. Its purpose is to receive alarm data from Genesis wireless PIRs, beams and other sensors and pass it to a control unit (LGRU16) or compatible device via a RS232 link or USB for remote configuration using a laptop or PC.

The masthead receiver can transmit data as well as receive it and so can communicate back to the Genesis Walk Test instrument (LGMT434) to show all received information as well as the signal strength at the masthead. In addition, the Masthead can act as a repeater for systems that require a greater wireless range. Up to seven Mastheads can be used as repeaters on any one system.

The new push button and LED display makes it easier and quicker to programme units and there are several new features, including two configurable relays with volt-free contacts that can be assigned as alarm and/or tamper outputs for individual or grouped alarms or tampers.

The relays can also provide a physical contact change when the system is armed or disarmed, or they can connect to a door access system so that remote operation is possible from a keyfob (LGKF4). Additionally, the new version has two configurable transistor input/outputs that can be used in a similar way to the volt-free relays. For example, by switching the I/O to ground they act as input commands to set or unset the system from a hardwired keypad. 

Technical Specifications
Transmission Frequency 434.525 Mhz
Transmission Range Up to 1km line of sight
Aerial 50 ohm 1/4 wave
Site Codes 32
Unit Codes 64
Output RS232 & USB
Operating Voltage 12v DC or 5v DC via USB
Power Consumption Max 58m/a at 12v DC
Temperature -10°C to +60°C
Weather Rating IP66
Enclosure ABS plastic housing


This alternative to the LGMT434 Masthead Receiver but has the addition of relay outputs which can be connected directly to the alarm pre-sets of a PTZ camera.

The unit provides either 4 alarm outputs with corresponding tamper outputs or eight alarm outputs without tampers. DIL switches set the different modes as well as the unit code groups. Expansion units are available to increase the number of alarm outputs. There is no limit to the number of LGMRU4x4 V2 units that can be used on any one system.

This unit can transmit information as well as receive it which means it will transmit back to a Walk Test Instrument to show all received information as well as signal strength back at the masthead. In this way the installer knows that the detector is working correctly and also that it is being received by the system. In addition, it can perform as a repeater for systems that require greater transmission operating distances. An optional aerial (AE434) may be used Instead of the supplied aerial for improved reception.

Technical Specifications
Transmission Frequency 434.525 Mhz
Transmission Range Up to 1km line of sight
Aerial 50 ohm 1/4 wave
Relays 4 alarms and 4 tampers. Can be 8 alarms without tampers
Auxiliary Relays 2
Contact Duration Selectable 250ms to 39 minutes
Contact Status Selectable N/O or N/C
Operating Voltage 12 volts DC
Power Consumption Min 65m/a Max 150m/a
Temperature -10°C to +60°C
Weather Rating IP66
Enclosure ABS


The LGRU16 & LGRU16ELR control interface relay units provide physical alarm and tamper outputs for DVR and Alarm systems.

Between one and four LGRU16 relay units can be connected with a single masthead receiver to provide the maximum of 64 alarm and 64 tamper contacts.

The LGRU16 is supplied with one LGRM8 relay module which provides 8 alarm and 8 tamper relay contacts that can be interfaced to virtually any alarm system. A further LGRM8 module can be added to increase it to 16 alarm and 16 tamper outputs.

The LGRU16ELR version has screw terminals and End Of Line Resistors built in. The resistor values are plug-in modules and may be changed according to the alarm type (see list). On the front panel, a display shows information on alarms faults and tampers, which are held in the log. The PIR’s call in periodically and are monitored individually. If they fail to call in, an alert is raised. An additional RS232 output enables a PC to be connected and the FREE MH Manager software can be used to analyse the wireless system.

Technical Specifications
Operating Voltage 12v DC
Power Consumption Max 265m/a
Alarm Relay Change ocer contacts
Tamper Relay N/C
End of Line Resistor Same relays but with a resistor module
Temperature Range -10°C to +60°C
Weather Rating IP44
Enclosure ABS
LGRU16ELR End of Line Resistor Variants
Adpro LGRU16ELR/Adpro
Castle LGRU16ELR/Castle
Galaxy LGRU16ELR/Galaxy
LGRM8ELR End of Line Resistor Variants
Adpro LGRM8ELR/Adpro
Castle LGRM8ELR/Castle
Galaxy LGRM8ELR/Galaxy