Mobrey

TRIGGER INPUTSThere is trigger input D1. This can be used to control desludge and other functions see programming section. Thedigital trigger input is connected as shown below:5V10D180V7A voltage greater than 2V on Terminal 8 (D1) causes trigger input 1 to be active. This can be achieved byconnecting to terminal 10 (5V) via an external switch or relay. The maximum voltage should not exceed28V.24V24V25MES*AI ORELECTRO SENSOR0V26D180V0V7The trigger input is also compatible with the MOBREY Electrosensor sensors and head amplifiers. A 24V output isprovided for this purpose. Typically this allows complete control of the desludge cycle by using a second sensor(Electrosensor) to start or stop the cycle. The terminal connections are shown above (note: it is important that the two0V connections on terminals 7 and 26 are linked).NOTE : When connected to these terminals the electrosensor sensors and head amplifiers MUST NOT beinstalled in explosive atmospheres.MAINS SUPPLYThe unit can be powered either by 24V DC or by mains AC power. If both are connected, the unit will select thesupply producing the highest internal 24V power rail. Select the AC Voltage as 115V or 230V using the selector slideswitch above the AC line terminals.Although the MSM400 meets all European standards for surge immunity on power and signal lines, it isrecommended that lightning suppressors are fitted if local conditions make this advisable. Units manufactured byTelematic are suitable.SAFETY PRECAUTIONSA switch or circuit breaker should be installed in close proximity to the instrument, and labelled as such.The unit must be earthed using the protective earth terminal 31.INITIAL POWER UPThe unit will initially display the software revision number on Power up, and then revert to the standard displayscreen, showing a measured slurry/sludge density. If the sensor is in air, then this value will be high -the unit iseffectively at full scale deflection.IP25815