NT217 C GB1
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5
– CONVERTER ASSEMBLY:
5-1: Mechanical assembly
Prefer conditions allowing easy access and legibility.
Avoid mounting on supports exposed to vibration.
Avoid extreme climatic conditions and direct exposure to sunlight.
Attachment is by two M5 screws for industrial boxes
or on a 2” stake for a Ex d box.
5-2: Electrical Connections
: Refer to the diagram on the previous page.
Power supply: Connector BR 1
– Use a flexible cable having a section of 0.5 to 1.5 mm2
- The recommended source is DC from 10 to 30 Volts (60 V as an option): 12 / 24 (48)
- Any polarity will do. The required power is less than 2 Watt.
- The source may also be alternating (9 to 18 Volts
– 50/60 Hz ) via a transformer.
RS 232 or 485 digital outputs: BR 2 , terminals 1 to 6.
- The PC-DB9 cable uses RS 232 with Tx at 2, Rx at 3 and 0 Volt at 5 .
- For a permanent link (logic controller, modem):
. For RS 485: connect RTx
– to terminal 3 and RTx + to terminal 4
. For RS 232: connect Tx to terminal 1, Rx to terminal 2 and common to terminal 5
. The RS 232 output is activated by default. To activate RS 485 instead of RS 232,
connect terminals 5 & 6
On/Off outputs - Relay (Static): BR 2, terminals 7 to 10
– flexible multipair cable.
- Comply with the limits V < 100 V
– I < 0,1 A and allow for R
ON
= 10 Ohm .
- Each relay Re 1 (terminals 7 & 8) or Re 2 (terminal 9 & 10) will transmit the chosen
status information from the “General Parameters” menu.
Analog outputs 4
– 20 mA: BR 2 , terminals 11 to 14 – Flexible multipair cable.
- These outputs are independent and
galvanically isolated
from each other,
but also from other MiniSonic circuits and by default are
passive
.
They must be connected to a receiver providing the power supply (30 V max.)
to allow a load of more than 1 kOhm .
- Output No. 1 (terminals 11 & 12) and output No. 2 (13 & 14) will transmit magnitude
and range variation information as chosen from the “General Parameters” menu: flow
rate, but also speed of sound and gain.
- Using the power supply voltage appearing on terminal block BR 5 (see diagram)
the analog outputs are rendered
active
but with the drawback of losing some 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 of two probes: BR 4 (BR 3 is reserved for the dual-channel versions)
- Use preferably the twin-ax cables (ET1217) specified by Ultraflux.
- For armoured cable (ET1217A), stop the foil wrap before or inside the gland.
- For a positive flow rate, connect the upstream probe across terminals 2 and 3 with a
shield at 1, and the downstream probe across terminals 4 and 5 with a shield at 6 .
- If coaxial cables, connect the cores to 3 and 5 and the braids to 2 and 4. For a triaxial
cable, the external shields will be connected to 1 and 6.
- For the Ex d version, the braids will preferably be stopped and connected in the Ex d
glands, and the conductors will have approximately 15 cm length, up to the terminal
blocks.