Components; Sensors; Release Unit; Main Assembly - Bosch PSC 2 Manual Original

3.3

Components

The PSC 2 is a non-contacting, self-testing safety device
for working pits operating on the basis of infrared light.
Functions:
R
Starting inhibitor or re-starting inhibitor
R
Contactor monitoring
R
Protective operation
Roller set right
Sensor receiver
Working pit
Sensor transmitter
Roller set left
Fig. 1: Set-up pit guard

1 Release unit

2 Main assembly

3.3.1

Sensors

There are 2 sensor types: transmitter and receiver.
Sensors are always used in pairs. The sensors are pro-
tected by a plastic cover (lens cover).
The sensors monitor the pit in lateral direction and de-
tect objects that are larger than 25 cm.
Module lengths of sensors:
R
1114 mm
R
754 mm
Transmitter
The transmitter sends out infrared rays and generates
an invisible light guard, which monitors access to ha-
zard locations and danger areas (detection field).
Receiver
The receiver is mounted opposite the transmitter and
receives the infrared rays emitted.
i
If reception of the infrared rays is not impeded, the
brake test can be performed.
i
If the light guard is interrupted, the control module
switches to "OFF" and the movement of the rollers in
the sets of rollers is halted.
3.3.2
The release unit activates the pit guard and monitors
the light guard.
1
2
Fig. 2:
1 Release unit
Item Denomination
1
3.3.3
The main assembly regulates operation of the pit guard.
It also supplies voltage for the connected parts of the
tester set. The main assembly itself receives its voltage
from the electrical cabinet.
Product description | PSC 2 | 15
Release unit
1
Electrical cabinet with release unit
Meaning
Activation button Activates the light guard.
Red lamp R Light guard interrupted.
R Sensor lens cover contaminated
Main assembly
1 692 806 101
en
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2018-05-18