3
1.2. Block diagram (fig.1).
Fig.1. Block diagram of the power supply.
1.3. Description of elements and connectors of the power supply ( table 1, table 2, fig. 2, fig.4).
Element No.
[Fig. 2]
Description of LB4/24V/27V/AW elements
[1]
L1÷L4 -
LED diodes (green) signalling the status of L1=AUX1 output, etc.
[2]
F1÷F4
fuses in AUX circuits, F1=AUX1 etc. circuits
[3]
COM-U1-U2
Input of the AC supply (required transformer separation)
[4]
AUX1÷AUX4 –
outputs, common
COM
clamp
[5]
L
AW
red diode signalling failure of one of the outputs (activation of a safety device)
[6]
AW
output signalling failure of one of the outputs, OC type (normal L status, failure: hi-Z)
[7]
Jumper of the change in PTC/fuse-element safety device type
Fx Fx.x
Fx jumper used, fuse-element protection device selected
Fx Fx.x
Fx.x jumper used, polymer protection device selected
[8]
Jumper of the AUX output voltage change (independently for each output):
U2 U1
U2 jumper used, voltage on AUXx= U2 output
U2 U1
U1 jumper used, voltage on AUXx= U1 output
Table 1. LB4/24V/27V/AW terminal and elements–fuse block.
