External Power Supply - Bosch WT PSI 6 Series Technical Information

7.2.2

External power supply

Configuration B
1070 080 086-101 (01.01) GB
PSI 6XXX.190 W1
The power supply to PSI 6XXX.190 W1 is provided by an external unit (external supply).
Several jumpers have to be positioned to enable the external power supply.
The power supply to the timer is thus independent of the welding network.
For configuration B, the external power supply must satisfy the following requirements:
- Maximum ripple <5 %, tolerance -15 % / +20 %.
- Making current: approx. 2.0 A, duration approx. 10 ms, plus the current of
the inputs and outputs and the current of the external unit connected to X5.
- continuous current: approx. 1.5 A, plus the current of the inputs and outputs
and the current of the external unit connected to X5.
NOTE
For determining the power supply rating, sum up the individual loads required.
Functions:
- No interfaces are interrupted when the welding network is switched off:
- communication via I/O interfaces is possible
- communication between the timer and the programming terminal, e.g. pro-
gramming and visualization is possible.
- Preferably used in networked systems
- only one non-floating 24 V DC supply for the entire system
- The Stop function is ensured by means of a floating contact which is to be con-
nected to terminals X4/3 and X4/4.
- Opening the stop contact will interrupt:
- the firing
- the power supply to the parallel inputs and outputs
- the power supply to the external unit.
Electrical connection
7-9