MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters

MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters

The following MTL7700 Series Shunt Diode Safety Barrier Assemblies were submitted to the Mine Safety and Health Administration (MSHA) of the U.S. Department of Labor for acceptance as part of an MSHA approved permissible system or machine.
MTL7715+            MTL7715P+        MTL7755ac
MTL7760ac           MTL7761ac        MTL7765ac
MTL7766Pac          MTL7767+         MTL7787+/-
These Safety Barrier Assemblies were evaluated by MHSA and judged to meet the applicable requirements of Title 30 Code of Federal Regulations, Part 18.68 (30 CFR Part 18.68) provided that a relevant installation complies with the following conditions.
a) The installation shall preclude intermingling between intrinsically safe circuits,including their associated wires and cables, and all other circuits, wires, and cables.
b) The MTL7700 Series Shunt Diode Safety Barrier Assemblies must be securely mounted within a suitable dust-tight enclosure in a fresh air area of the mine or an explosion-proof enclosure.
c) The MTL7700 Series Shunt Diode Safety Barrier Assemblies must be grounded according to the manufacturer’s instructions.
d) The equipment connected to the the input terminals of the barrier must not use or generate more than the maximum 120Vrms.

MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters

ANALOGUE INPUTS (LOW-LEVEL)
Thermocouples and mV sources
The recommended barrier for thermocouples and mV sources is the MTL7760ac. This 2-channel non-polarised barrier retains the ‘earthfree’ nature of the signal and, providing the receiver’s input ‘floats’,rejects common-mode ac and dc interference up to at least 7V and is unaffected by earth faults on the primary element.

MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters
Slidewire displacement transducers The simplest choice is the MTL7760ac. This barrier supplies power and brings back a unipolar signal.

MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters
AC sensors, photocells, microphones and turbine flowmeters The MTL7760ac is the recommended choice for these devices. While
many of these are designated ‘simple apparatus’ and thus do not need certification, note that some ac sensors may be subject to a significant level of inductance and will therefore need to be designed and certified for hazardous-area locations.
MTL Safety Barries 7760AC For Photocells,Microphones And Turbine Flowmeters