The MM4 is a PCB designed to monitor and alarm on failure of the supply voltage. MM4 also features 2 x volt-free digital inputs which raise independent alarms on contact closure (any switched input eg. water level, fridge door, bilge high, pump tripped etc etc). Alarms are indicated by a common sounder output and 2 x pulsing digital outputs, 1 per digital input.
The supplied PP3 rechargeable back-up battery keeps the MM4 operational on supply voltage failure for up to 8 weeks. The battery is kept topped up when MM4 supply voltage is present.
The MM4-DC can be supplied from a SOLAR PANEL KIT, the back-up PP3 battery will then alert to failure of the solar system. The MM4-DC has been extensively tested on a 20W solar panel kit (RS part number 286-4015) with a 6.5Ah lead acid battery (RS part number 198-4036).
These units are perfect for building your own branded alarm system boxes or for putting into electrical control panels, new or retrofits.
Kit includes 1 x MM4 PCB, 2 x IP67 Red Alarm LEDs, 1 x IP65 Stainless Steel buzzer, 1 x IP65 mute button and 1 x Ni-Mh rechargeable PP3 back-up battery
There are two versions MM4-AC (monitored) supply voltage 230V AC or MM4-DC (monitored) supply voltage 12V DC. Select which one you require when ordering
Supply Voltage Failure + 2 x Switch Input Alarms PCB Kit
- Integrated battery charger for Ni-MH rechargeable PP3 back-up battery
- Supply voltage fail alarm time using recommended battery ~ 8 weeks
- Supply voltage fail alarm: SLOW ALARM audible beep output every 30 seconds. On muting the supply voltage fail buzzer both voltage alarm outputs pulse together every 30 seconds until supply voltage restored
- Digital input alarms: FAST ALARM audible beep every 2 secs plus pulsing voltage alarm output every 2 secs per output
- Combined mute input / mute time configuration digital input
- Mute mode: When in alarm closing mute contact silences the sounder, if the alarm isn’t cleared within the configurable mute time the sounder will re-activate
- Configurable mute time – 1, 2, 4, 8, 12 or 24 hours, when a muted & uncleared alarm exceeds the set time the audible alarm will re-activate (default 24 hours)
- Volt-free relay (SPCO) failsafe common alarm output (de-energises on any alarm) for telemetry etc. (MAX 0.5A @ 230V AC)
- 2 year warranty
- PCB dimensions 85mm L x 80mm W x (max) 15mm D
- Approvals: CE, UL, CSA
Email sales@io-pro.co.uk for a copy of the full DATASHEET