Tecfluid FLOMID-MX - Manual (Page 3)

3
1 INTRODUCTION
The Flomid-MX electronic control unit adapts to the different Flomid and Flomat series
electromagnetic flow sensors.
The microprocessor electronic circuit offers the following functions:
• Pulsed coil excitation to obtain a minimum zero drift.
• User programmable pulse and 4-20 mA outputs proportional to the flow rate.
• Outputs for batching and alarms.
• Local indicator, orientable in four positions.
• Mounting: compact or separate from the sensor.
• Easily removable from the sensor for maintenance.
2 INSTALLATION INSTRUCTIONS
For the electrical connection, the Flomid-MX has two terminal strips situated at the rear of the
instrument.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
9.Neutral (AC) / Negative (DC)
10.Live (AC) / Positive (DC)
8.Earth
3.Ground (main shield)
4.Output1. Collector
5.Output1. Emitter
2.Lower coil (black)
1.Upper coil (red)
7.Output2. Emitter
6.Output2.Collector
17.Rear electrode + (white)
20.Front electrode + (black)
15.mA output (+)
16.mA output (-)
11.Reset. Anode
12.Reset. Cathode
14.Pulse output. Collector
13.Pulse output. Emitter
19.Electrodes shield
Jumper (18 19) &
For the electrical installation it is recommended to use multiple conductor cables with individual
cable sections in the order of 0.25 to 0.5 mm 2 in order to make it easier to connect. It is better to maintain
the cables with mains voltage (power supply, relays etc.) separated from the cables with low level
signals (pulse output, 4-20 mA etc.)
Before starting the installation, check that the cable glands are the right size for the cables to be
used, this will guarantee the instrument will stay watertight. The PG 11 cable glands used are for cables
with outside diameters between 6 mm and 10 mm.
Peel the outside insulation to free the inner cables to a length that will allow the end of the
outside cover to just pass the cable glands when the cables are connected. The fine cables should not
be too short to avoid them being under tension or too long to avoid them getting in the way when the
rear cover is screwed on. It is recommended to tin the ends of the wires to avoid loose ends which can
produce short circuits..
Once the wiring is finished make sure that the cables are well gripped by the cable glands,
screw the rear cover in place and fix it with the grub screw.
IMPORTANT: In order to comply with the electrical safety requirements as per EN-61010-1 (IEC 1010-
1), the installation of the equipment must take into account the following: