ABB vital 1 Original-Bedienungsanleitung - Seite 14
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Cable lengths and number of sensor/adaptor units for the three connection examples
As a guideline value when determining the number of sensor/adaptor units that can be connected to a Vital 1 unit,
one Spot T/R is equivalent to five Eden or Tina units. Units connected in parallel are equal to one unit in series.
The following examples provide guidelines as to possible configurations and cable lengths using suitable cables.
Example 1
Up to 1000 metres of cable (0.75 mm
this example. The connection is equivalent to 9 Eden or Tina units.
A maximum of 30 Eden or Tina units can be connected to the Vital 1 unit on a maximum cable length of 500 metres
2
(0.75 mm
conductors) or 300 metres (0.34 mm
Example 2
Up to 600 metres (0.75 mm
sensor/unit connected to the Tina 8A. This connection example is equivalent to 17 Eden or Tina units.
A maximum of 3 Tina 8A units, equivalent to 27 Eden / Tina units (= 3 x 8 connected to Tina 8A + 3 Tina 8A) can
be connected to one Vital 1 with a total cable length of 600 metres (0.75 mm
connected to one Vital 1 (equivalent to 30 Eden/Tina units) with a total cable length of 600 metres (0.75 mm
Tina 4A.
Example 3
Either 2 x 500 metre cables (0.75 mm
sensor/unit or 2 x 10 metre cables (0.75 mm
sensor/unit. The connection is equivalent to 16 Eden or Tina units.
A total of 30 Eden/Tina units can be connected using a maximum cable length of 1000 metres (0.75 mm
2
metres (0.34 mm
). If the power supply is only fed from one direction (from one end of the network) the total cable
length is reduced to approx 300 metres (0.75 mm
Connection advice for dynamic sensors to Vital 1
Sensors can be connected in many different ways. Here is some advice that can make the connection better and
more stable. The advice is general, but particularly applicable when using Tina 4A and Tina 8A units.
Never have more than the recommended number of sensors in the circuit.
If possible, use a switched mains power supply that can deliver stable 24 VDC.
In the sensor system, use as short cables as possible.
When connecting a Tina 4A or Tina 8A unit, the supply voltage at the terminal (out at the unit) must not be
less than 20 VDC.
Use shielded cable, preferably 0.75 mm
for example at the apparatus enclosure and not at both ends.
Do not route the signal wiring close to heavy current cabling or close to equipment that gives off a lot of
interference, such as frequency converters for electric motors.
Never connect "spare", unnecessary conductors.
If M12-3B units are used for connection of a parallel loop, with supply to the sensors from two directions,
the loop must be as short as possible. This is because the conductors that are not being used are also
connected, which increases the capacitive load, reducing the stability of the system.
2TLC172156M0201, rev. C
2016-07-04
2
2
or 0.34 mm
conductors) in total can be connected to the sensors/units in
2
conductors).
2
conductors) to Tina 8A and 10 metre cables type M12-C1012 (0.34 mm
2
) from the control cabinet and 10 metre cables (0.34 mm
2
) from the control cabinet and 200 metre cables (0.75 mm
2
) and 100 metres (0.34 mm
2
or thicker, from the apparatus enclosure and ground it at one end,
2
). Up to 6 Tina 4A units can be
2
).
14
2
) to each
2
) to
2
) to each
2
) to each
2
) or 400
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