Elmo PSS 6U - Manual (Page 6)

Elmo PSS User Guide
MAN-PSSUG (Ver. 3.01)
2-1
Chapter 2: Product Description
The PSS and PSSF power supplies were designed to complement Elmo servo amplifiers
that do not include an integrated power supply. All PSS/PSSF models include shunt
regulators and feature high capacitance, a low profile and snap-in capacitors. The PSSF
supply requires fan cooling. The power supplies are built around two basic sizes: Eurocard
(3U) and double Eurocard (6U). Two mounting versions are available:
Surface mount version - has 4 thru-holes for screw assembly
Panel mount version - connects to 19-inch rack with drop-on slots and connects electrically
via DIN 41612 backplane connectors
All Eurocard (3U) power supplies are shipped for single-phase connections, although they
include a built-in three-phase option. The shunt regulator, included with the PSS and PSSF
supply, is designed for use with high-inertia loads. These supplies incorporate thermal and
duty-cycle protections.
2.1 Standard Features
The following tables list the features of the PSS, in both Horizontal and Rack mount
version. Table
2-1 covers the Eurocard (3U) and Table 2-1 covers the double Eurocard (6U)
sizes.
Term.
Block
32-pin
connector
Function Comment
0 14a, 14c
16a, 16c
AC-1 supply input (through
an isolated/floating
transformer) In single-phase connections (of PSS type 3U),
this terminal is internally shorted to terminal
1 by W2. The power supply is modified for
three-phase connections by removing W2
and connecting the third phase to terminal 1.
1 18a, 18c
20a, 20c
AC-3 supply input (through
an isolated/floating
transformer) For DIN mounting, all four pins must be
connected.
2 22a, 22c
24a, 24c
DC Power output return
(PR) For DIN mounting, all four pins must be
connected.
3 26a, 26c
28a, 28c
DC Positive power output
(VP+) For DIN mounting, all four pins must be
connected.
4 30a, 30c
32a, 32c
AC-2 supply input (through
an isolated/floating
transformer) For DIN mounting, all four pins must be
connected.
5* 6a, 4c Inhibit indication return Internally connected to power output common.
6* 4a Inhibit indication output Whenever power supply is inhibited (e.g.
during thermal/duty cycle), this open
collector output goes into low state
(maximum sink current: 10 mA, 30 VDC).
Table 2-1: PSS Terminal Description: 3U Power Supplies