FMS EMGZ Series, Руководство по эксплуатации

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Operating Manual EMGZ611A...614A
15
7.3 Mounting the Force Sensors
Mounting of the force sensors is done referring to the FMS Installation manual
which is delivered together with the force sensors. The connection between the
force sensors and the electronic unit is done using 2x2x0.75mm
2 [AWG 18]
shielded twisted pair cable. (With cable length below 15m, 2x2x0.25 mm
2
[AWG
23] is also suitable.) The cable must be installed separate from power lines.
Wiring to the terminals of the electronic unit is done according to the wiring
diagram (fig. 7). If two force sensors are used per measuring point, the cables are
wired parallel (ref. to wiring diagram, channel 1).
Note
The force sensor signal consists of only a few mV and is therefore susceptible to
external influences to the cable. To increase immunity to interfering use one pair
of the twisted pair cable for +signal and –signal.
Note
Connecting the shield of the signal cable to the electronic unit and to the force
sensor may cause ground circuits which may interfere the measuring signal
massively. Malfunction can be the result. The shield should be connected only to
the electronic unit. On the „force sensor side“, the shield should stay open.