REXRTOHIndraDrive Control Sections CSB02, CSE02, CSH02, CDB02

This section concerns components of the electric drive and con‐

trol system with voltages of more than 50 volts.

Contact with parts conducting voltages above 50 volts can cause personal

danger and electric shock. When operating components of the electric drive

and control system, it is unavoidable that some parts of these components

conduct dangerous voltage.

High electrical voltage! Danger to life, risk of injury by electric shock or seri‐

ous injury!

● Only qualified persons are allowed to operate, maintain and/or repair the

components of the electric drive and control system.

● Follow the general installation and safety regulations when working on

power installations.

● Before switching on, the equipment grounding conductor must have

been permanently connected to all electric components in accordance

with the connection diagram.

● Even for brief measurements or tests, operation is only allowed if the

equipment grounding conductor has been permanently connected to the

points of the components provided for this purpose.

● Before accessing electrical parts with voltage potentials higher than

50 V, you must disconnect electric components from the mains or from

the power supply unit. Secure the electric component from reconnec‐

tion.

● With electric components, observe the following aspects:

Always wait 30 minutes after switching off power to allow live capacitors

to discharge before accessing an electric component. Measure the elec‐

trical voltage of live parts before beginning to work to make sure that the

equipment is safe to touch.

● Install the covers and guards provided for this purpose before switching

on.

● Never touch any electrical connection points of the components while

power is turned on.

● Do not remove or plug in connectors when the component has been

powered.

● Under specific conditions, electric drive systems can be operated at

mains protected by residual-current-operated circuit-breakers sensitive

to universal current (RCDs/RCMs).

18/143 Bosch Rexroth AG DOK-INDRV*-CXX02******-PR03-EN-P

IndraDrive Control Sections CSB02, CSE02, CSH02, CDB02

S

● Secure built-in devices from penetrating foreign objects and water, as

well as from direct contact, by providing an external housing, for exam‐

ple a control cabinet.

High housing voltage and high leakage current! Danger to life, risk of injury

by electric shock!

● Before switching on and before commissioning, ground or connect the

components of the electric drive and control system to the equipment

grounding conductor at the grounding points.

● Connect the equipment grounding conductor of the components of the

electric drive and control system permanently to the main power supply

at all times. The leakage current is greater than 3.5 mA.

● Establish an equipment grounding connection with a minimum cross

section according to the table below. With an outer conductor cross sec‐

tion smaller than 10 mm2

 (8 AWG), the alternative connection of two

equipment grounding conductors is allowed, each having the same

cross section as the outer conductors.

Cross section outer con‐

ductor

Minimum cross section equipment grounding conductor

Leakage current ≥ 3.5 mA

1 equipment grounding

conductor

2 equipment grounding

conductors

1.5 mm2

 (16 AWG)

10 mm2

 (8 AWG)

2 × 1.5 mm2

 (16 AWG)

2.5 mm2

 (14 AWG) 2 × 2.5 mm2

 (14 AWG)

4 mm2

 (12 AWG) 2 × 4 mm2

 (12 AWG)

6 mm2

 (10 AWG) 2 × 6 mm2

 (10 AWG)

10 mm2

 (8 AWG) -

16 mm2

 (6 AWG)

16 mm2

 (6 AWG)

-

25 mm2

 (4 AWG) -

35 mm2

 (2 AWG) -

50 mm2

 (1/0 AWG) 25 mm2

 (4 AWG)

Protective extra-low voltage as protection against electric shock 

Protective extra-low voltage is used to allow connecting devices with basic in‐

sulation to extra-low voltage circuits.

On components of an electric drive and control system provided by Rexroth,

all connections and terminals with voltages up to 50 volts are PELV ("Protec‐

tive Extra-Low Voltage") systems. It is allowed to connect devices equipped

with basic insulation (such as programming devices, PCs, notebooks, display

units) to these connections.

Danger to life, risk of injury by electric shock! High electrical voltage by incor‐

rect connection!

If extra-low voltage circuits of devices containing voltages and circuits of

more than 50 volts (e.g., the mains connection) are connected to Rexroth

products, the connected extra-low voltage circuits must comply with the re‐

quirements for PELV ("Protective Extra-Low Voltage").

3.3.3 Protection against dangerous movements

Dangerous movements can be caused by faulty control of connected motors.

Some common examples are:

● Improper or wrong wiring or cable connection

● Operator errors

● Wrong input of parameters before commissioning

● Malfunction of sensors and encoders

● Defective components

● Software or firmware errors

These errors can occur immediately after equipment is switched on or even

after an unspecified time of trouble-free operation.

The monitoring functions in the components of the electric drive and control

system will normally be sufficient to avoid malfunction in the connected

drives. Regarding personal safety, especially the danger of injury and/or

property damage, this alone cannot be relied upon to ensure complete safety.