Rockwell Automation SA500 DC Bus Supply - Manual (Page 13)

Mechanical/Electrical Description 2-3
Terminals 3 and 4 of interface connector TB1 are not supported at this time and must
not be used.
Note that jumper W1, which is visible only when the cover is removed, must be set to
position B (factory setting) for the bus supply to operate correctly. See figure 3.2 in
chapter 3. With the jumper in position B, the bus supply will be on (enabled) whenever
the correct three-phase AC input voltage is present.
2.2 Electrical Description
The bus supply rectifies the incoming 230 VAC and charges the DC bus capacitors
using “soft charge” circuitry to reduce the inrush currents. Braking transistor circuitry is
included to automatically connect a braking resistor across the DC bus whenever the
motor load is regenerative and the DC bus voltage rises above the threshold level
(1.47 x RMS line voltage + 5V).
Bus supply models 615055-2R and 615055-2S have internal braking resistors. Bus
supply models 615055-2T and 615055-2V require external, user-supplied braking
resistors. Refer to section 3.2 for more information on selecting braking resistors.
Figure 2.2 – Circuitry of Terminals 1 and 2 of Interface Connector TB1
Not Supported
Do Not Use
1
2
3
4
STATUS-
STATUS+
INTERFACE CONNECTOR TB1
1
2
1
2
COM
+V
COM
+V
SAMPLE EXTERNAL CONNECTIONS
Not Supported
Do Not Use