Elmo PSS 3U, PSS 6U manual Product Description, Standard Features

Elmo PSS User Guide

MAN-PSSUG (Ver. 3.01)

Chapter 2: Product Description

2-1

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.

2.1Standard 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.	32-pin Function	Comment
Block	connector

014a, 14c AC-1 supply input (through 16a, 16c 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.

118a, 18c AC-3 supply input (through 20a, 20c an isolated/floating

transformer)

For DIN mounting, all four pins must be connected.

2	22a,	22c	DC Power output return	For DIN mounting, all four pins must be
	24a,	24c	(PR)	connected.
3	26a,	26c	DC Positive power output	For DIN mounting, all four pins must be
	28a,	28c	(VP+)	connected.
4	30a,	30c	AC-2 supply input (through	For DIN mounting, all four pins must be
	32a,	32c	an isolated/floating	connected.
			transformer)
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