NT 208D GB1
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5
- CONVERTER ASSEMBLY
Mechanical fittings
Use a location that offers preferential conditions for easy access and vision.
Avoid mounting on supports exposed to vibration.
Avoid extreme weather conditions and direct exposure to the sun.
Wall fitting is done by two M5 screws for industrial enclosures, or by using our
support and fixing on a 2 ‘’ vertical tube with our Ex d version .
Electrical connections
: Refer to the diagram on the previous page.
Power supply: Connectors BR 1
– Use flexible cables with section 0.5 to 1.5 mm2.
- The recommended source is DC, 10 to 30 Volts (60 V on option): 12 / 24 (48).
- Any polarity will do. The required power is less than 2 Watt.
The source may also be A.C. (9 to 18 Volts
– 50/60 Hz) via a transformer on the
mains. The other and best solution is to order MiniSonic with GP01 module.
RS 232 or 485 digital outputs: BR 2 A, terminals 1 to 6.
- Cable PC-DB9 uses RS 232 with Tx on 2, Rx on 3 and 0 Volt on 5.
-
For a permanent link (logic controller, modem … ) :
. For RS 485: connect Rx
– to terminal 3 and Tx + to terminal 4
. For RS 232: connect Tx to terminal 1 and Rx to terminal 2 with common to 5 .
. No need of any other connection to validate RS 232.
. Connect terminals 5 to 6 to validate RS 485.
- On/Off outputs - Relays (Static): BR 2B, terminals 7 to 10
– multi-pair cables
- Comply with the limits V < 100 V; I < 0.1 A; R
ON
= 10 Ohm.
- Each relay Re 1 (terminals 7 & 8) or Re 2 (terminals 9 & 10) will transmit the chosen
status information in the “General Parameters” menu.
4
– 20 mA analog outputs: BR 2B, terminals 11 to 14 – Multi-pair cables.
- These are independent outputs
galvanically insulated
in respect to each other, but
also with respect to the other MiniSonic circuits and by default are
passive
and need
to be connected to a receiver supplying the power (30 V max.) to allow a load of
more than 1 k ohm.
- Output No. 1 (terminals 11 & 12) and output No. 2 (13 & 14) will transmit magnitudes
and ranges of variation as chosen in the “General Settings” menu: flow rate but also
speed of sound, gain, etc.…
- It is possible to carry out internal wiring to allow
active
outputs by associating the
terminal block BR 5 (see diagram) already linked to power supply voltage connected
to BR1, but with the drawback of losing part of the galvanic insulation.
! With a 12
V DC or AC supply, R “loop” is limited to 150 or 200 Ohms.
Attention! If this R loop is too high for the supply, the curent fall down to 4 mA
Connection to probes: BR 4 (chord 1) & BR 3 (chord 2).
- Use Twin-ax cables specified by Ultraflux (ET1217 & ET1217A).
-
In the industrial version, shield and conductors are separated in the “Y” compartment
of the Y gland, while leaving a free length of 10 cm to terminal blocks.
- In the Ex d version, the shields are stopped and connected in the stuffing boxes and
the conductors will be approximately 15 cm long up to the terminal blocks.
