Use a cable with finely stranded cores with a minimum cross section
of 0.75 mm
2
and a maximum cross section of 2.5 mm
2
for the supply
voltage. Comply with the following torques at the connectors:
● Screw terminal of the terminals: 0.22 Nm (minimum) up to 0.25
Nm (maximum)
● Bolt flange: 0.3 Nm (maximum)
Danger of electric shock due to electrical volt-
age.
● Only connect power supply units as power supply with safe isolation accord-
ing to DIN EN 50178 with PELV voltage according to DIN EN 61131-2. Estab-
lish permanent protective earth conductor connections.
Connect the supply voltage as described in the following:
1. Strip the oversheath of the cable to a length of 30 mm and the cores to a
length of 5 mm.
30 mm (1.181")
5 mm (0.197")
Fig. 10-5: Bared cable - Supply voltage
2. Provide the cores with wire end sleeves and connect the cores to the fe-
male connector strip.
3. Plug the female connector strip on the X1 connector strip at the operating
device.
4. Protect the female connector strip against disengaging using screw-lock-
ing.
10.6.2 Connecting the Functional Earth (FE)
A receptacle is using for the functional earth.
1. Strip the line to a length of 5 mm.
2. Use a receptacle for the bared line.
3. Position the receptacle on the tab connector.
VR 21
Bosch Rexroth AG
Assembly, Disassembly and Electrical Installation
DOK-SUPPL*-VR21**.01**-IT02-EN-P
17/29
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