Function Description - Pilz 20 748-03 Operating Manual

Function description

The PSS SB ACTIVE JUNCTION BASIS is a component part of the Pilz Active
Junction. An Active Junction consists of a base unit (PSS SB ACTIVE
JUNCTION BASIS) and up to two expansion modules (PSS SB ACTIVE
JUNCTION EXPANSION).
An Active Junction operates as an active junction with repeater function and is
designed for use in SafetyBUS p networks. It galvanically isolates up to 6 sub
branches from the SafetyBUS p main branch. The Active Junction can be used to
connect physically remote field devices to the SafetyBUS p main branch. The
field devices may be in either an IP20 or IP67 environment.
Fig. 1: Elements on the PSS SB ACTIVE JUNCTION BASIS (front view)
If the field devices are in an IP67 environment, the supply voltage for the field
devices can be provided via the Active Junction. In this case, special bus cable
will be required. This is designed for an IP67 environment and contains the lines
for the supply voltage for the field devices as well as the data lines. The
maximum extension of a sub branch is limited by a number of different factors
(number of bus subscribers in the sub branch, transmission rate, current
consumption of the connected field devices etc.).
The base unit PSS SB ACTIVE JUNCTION BASIS is designed for the formation
of two sub branches. If more than two sub branches are required, the expansion
module PSS SB ACTIVE JUNCTION EXPANSION can be used. It is possible to
connect a max. of two expansion modules. Each expansion module can be used
to connect two additional sub branches via the base unit to the SafetyBUS p main
branch.
Operating Manual: PSS SB ACTIVE JUNCTION BASIS
0V
1 24V
1... ...4 1...
-X0-
Note:
ACTIVE JUNCTION
Power
Traffic
2
1
Supply
Traffic
3
2
Supply
BASIS
-X1-
1... ...4 1...
4 -X2-
5
6
...4
-X5-
7
-X3-
...4
-X4-
8
SHIELD
5
1: Supply voltage terminal
2: Display elements sub
branch 1
3: Display elements sub
branch 2
4: SafetyBUS p interfaces
(sub branches)
5: Element for attaching an
expansion module
6: Functional earth
connection
7: SafetyBUS p interface
(main branch)
8: Terminals for connecting
the cable screening
3