Enabling Button; General Information; Enabling Function - Bosch Rexroth VCH 08.1 Manual

DOK-SUPPL*-VCH*08.1***-PR02-EN-P
Rexroth IndraControl VCH 08.1 Hand-held Terminal
7.3

Enabling Button

7.3.1

General Information

7.3.2

Enabling Function

WARNING
Red-yellow emergency stop buttons must function in all operation modes of a
machine or a plant at any time.
Hand-held terminals with red-yellow emergency stop button which are not con‐
nected to a machine, must be stored in a place where they cannot be seen by
the operator in order not to confuse operational devices with non-operational
devices.
● Unlocking an emergency stop facility must not result in uncontrolled start-
up of machines or plant.
● The emergency stop button does not replace other safety devices.
● The emergency stop button on the handheld terminal does not replace the
emergency stop button to be mounted directly on the machine.
● Some mechanical errors in the emergency stop button and in the stop
button can be recognized at operation only.
Test the function of the emergency stop button the device had been ex‐
posed to mechanical shock (e.g. it had been fallen on the ground).
Additionally, the emergency stop button must be tested cyclically (every
6 months) by activating the emergency stop button.
● For further information on the emergency stop button and stop button, do
observe also chapter 4 "Technical Data" on page
The following chapters contain more detailed information on the enabling but‐
ton:
● chapter 7.3.2 "Enabling Function" on page 73
● chapter 7.3.3 "Functioning" on page 74
● chapter 7.3.4 "Enabling" on page 74
● chapter 7.3.5 "Panic" on page 75
● chapter 7.3.6 "Foreseeable Misuse of the Enabling Switch" on page
76
The pin assingment and a connection example of the enabling device is con‐
tained in chapter 7.4.6 "X2.2: Enabling Button" on page
The IndraControl VCH 08.1 is equipped with two enabling buttons, one at the
left and one at the right side of the device. This allows a left- and right-hand
operation of the enabling button. Both enabling buttons are switched in parallel
and effect the common safety circuits in the connecting cable in the same way.
Therefore only one of the both enabling buttons must be activated.
The enabling button consists of a 3-stage operating element and an separated
evaluation electronics. An essential feature are the continuous 2-circuit design,
beginning from the actuating elements up to the connection terminals. Different
technologies and circuits are used for the evaluation circuits. Due to the elec‐
tronic switching contacts, their service life does not depend on the load provided
the nominal values of the load (ohmic, inductive and capacitive) are not excee‐
ded.
Bosch Rexroth AG
Pin Assignments of the IndraControl VCH 08.1
Non-functioning emergency stop devices can
have lethal consequences!
27.
73/117
82.