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Pulse encoders
Home > Flow meters >Pulse encoders

Encoder EM6422

Pulse emitter for positive displacement meters

  The pulse emitter “EM6422” converts the rotary motion of a Positive Displacement Flowmeter into electric pulses. It allows the meter to interface with ISOIL electronic counters (VEGA II, VEGA T).
  EM6422 “type A” may be mounted directly onto all recently built ISOIL p.d. meters. “Type B” may be mounted on all previous versions of ISOIL meters by means of and adapter. On demand, by means of dedicated flanges, it may be installed on meters from different brands.
  EM6422 is made of an aluminum encasing divided into compartments, each separated from the other by an aluminum wall.
  In one of the two compartments, a small shaft, installed on a roller bearing, is connected at one end to the output shaft of the pd meter, while on the other end, close to the separating aluminum wall, the small shaft is connected to a magnet. Inside the adjacent compartment, another magnet detects the rotation of the small shaft and causes an electronic circuit to generate electric pulses.
Thus, there is no need in the p.d.meter for dynamic seals that sometimes cause leaks due to the wear over time.

Technical characteristics

Housing material: Anodized aluminium alloy
Shaft material: Stainless steel (AISI 304)
Operating speed (input  revolution): 0÷1000 rpm
Cable/conduit entry: ½” NPT
Gaskets: Viton (standard) or Nitrile (on request)
Weight: 1000 gr
Mechanical protection: IP66
Ex protection: II 2 G Ex d IIB T5 Gb
Working temperature: -20 ÷ +75°C : Viton Gaskets  (standard); -30 ÷ +75°C : Nitrile Gaskets (on request)
Humidity: 0÷100 % non-condensing
Supply voltage: 5÷30 VDC
Pulses resolution: 64 pulses or 256 pulses/revolution
Operating: Bidirectional
Terminal block: Pull-out, 5 positions for wires (0,2÷1,5 mm2), shielded
Pulses Trasnmission  
Current supply: 40 mA max
Phase shift (A and  B channel): 90e° ±5%
Duty cycle: 50/50 ±5%
Pulses output: Open drain FET. Pull-up resistor 4,7 K   can be set by dip switch
Current sinking (A and  B channel): 50 mA for channel
CAN bus Transmission  
Current supply: 70 mA max
Serial communication: Interface: CAN bus
  Speeds: 50/125 Khz by dip-switch selection
Identifiers: 21÷24 (Hex) by dip-switches selection

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