Vital 1 Machine Safety System

Connection of Safety Units and Cable Lengths

Three Connection Alternatives

According to Category 4 (EN-954-1) connection of sensors/adapter units in the Vital safety circuit must be made as per the following connection examples (see drawing HH3400A below).

Example1

Use separate connection cables from each sensor or adapter unit to the Vital safety module. Interconnections to be made via suitable terminations in the control cabinet.

Example 2

Use Tina4A/Tina 8A connector blocks to simplify connection of externally mounted sensors/adapter units. Only Tina4A/Tina8A connector blocks must be used. Use of any other connector blocks will not meet the safety circuit requirements.

Example 3

Use M12-3A and M12-3B 'Y' connectors to connect sensors in series.

Cable Lengths and Number of Sensor/Adapter Units for the Three Connection Examples

In order to determine the number of sensor/adapter units that can be connected to a Vital 1 unit it must be remembered that 1(one) Spot T/R is equivalent to five (5) Eden or Tina units. Units in parallel are equal to one unit. The following examples provide guidance as to possible configurations and cable lengths using suitable cables.

Example 1

Up to 1000 meters (0.75mm² or 0.34mm² conductors) in total can be connected to the sensors/units in 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 meters (0.75mm² conductors) or 300 meters (0.34mm² conductors).

Example 2

Up to 600 meters (0.75mm² conductors) to Tina 8A and 10 meter cables type M12-C1012 (0.34mm²) to each 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 meters (0.75mm²). Up to 6 Tina 4A units can be connected to one Vital 1 (equivalent to 30 Eden/Tina units) with a total cable length of 600 meters (0.75mm²) to Tina 4A.

Example 3

Either 2 x 500 Metre cables (0.75mm²) from the control cabinet and 10 meter cables (0.34mm²) to each sensor/unit or 2 x 10 meter cables (0.75mm²) from the control cabinet and 200 meter cables (0.75mm²) to each 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 meters (0.75mm²) or 400 meters (0.34mm²). If power supply is only made from one direction (from one end of the network) the total cable length is reduced to approximately 300 meters (0.75mm²) and 100 meters (0.34mm²).