Rockwell Automation SA500 DC Bus Supply - Manual (Page 11)

Mechanical/Electrical Description 2-1
C
HAPTER
2
Mechanical/Electrical Description
This chapter describes the DC bus supply’s faceplate and internal electronics.
2.1 Mechanical Description
The DC bus supply consists of a phase-controlled SCR bridge, a DC bus regulator,
DC bus capacitors, and cooling fan(s). The components are housed in a sheet metal
enclosure.
The regulator circuit board assembly contains the LEDs and interface connector (TB1)
which are visible on the bus supply’s faceplate. On-board SCR and pre-charge
circuitry generate the DC bus voltage. On bus supply models 615055-2R and
615055-2S, the braking resistor(s) used to control the DC bus voltage during
regeneration are included. On bus supply models 615055-2T and 615055-2V, the
braking resistors must be added externally.
The faceplate cover of the DC bus supply is shown in figure 2.1. The cover is attached
to the DC bus supply’s chassis by the two square 1/4-turn fasteners shown.
Figure 2.1 – SA500 DC Bus Supply Faceplate
PHASE LOSS
OVER TEMP
DISABLED
PSM READY
TB1
LED Indicators
Interface Connector (TB1)
1/4 Turn Cover Fasteners