AccuFlo
®
Zero
– Installation and Operating Instructions
8
Installation and operating instructions AccuFlo
®
Zero
Figure 2: Metal block of the AccuFlo
®
Zero
Then the AccuFlo
®
Zero is pushed upon the threaded rods.
Now the seals are laid in the grooves of the valve manifold (or existing ones are replaced). The valve
manifold is pushed upon the thread rods as well.
Last, the nuts are screwed loosely on the thread rods. After checking the right positions of all
components tighten the screws.
Attention:
The assembling has to be checked thoroughly before commissioning!
5.2
Electrical connections
In the following chapter all electrical connections are described:
Power supply:
o
The AccuFlo
®
Zero needs a voltage supply of 24 V DC with a power rating of at least 2.1 ampere.
o
We recommend a switch-mode power supply.
o
We recommend positioning the power supply nearby the AccuFlo
®
Zero.
Wires from the AccuFlo
®
Zero to the transmitter:
o
One cable with 2 wires (two-wire interface 4
–20 mA).
Wires from the AccuFlo
®
Zero to the control station:
o
One cable with 2 wires (two-wire interface 4
–20 mA).
o
Optional: one cable with 2 ore 3 wires for the status relay (or accordingly more wires for the
interface mentioned above).
o
Optional: One cable with 2 wires for the manual triggering of the zero-point calibration (or
accordingly more leads for the interface mentioned above).
Attention:
The AccuFlo
®
Zero does not dispose of a galvanic separation between the GND of the power supply
and the GND of the control station.
