Owner`s manual

Figure 4-2: Block Diagram of the S4 Inverter Power System
4.3 Alarm Relays
Located just to the left side of the “Controller” printed circuit board card cage is the “Alarm” relay board. This is a
plug in circuit board with a terminal block located on the front of the card. Wire routing to the card will be through a
knock out located near the DC input, AC input/output knock out landings. A small hole in the “receivers” sheet metal,
with a grommet that can be used to feed the wires up to the front of this printed circuit board. The board can be
pulled out part way so as to make easy connections to the terminal block and then slid back into its connector. An
optional alarm circuit board (pending) which will allow the board to “talk” to the processor board via the RS-232
communications port.
4.4 Installation Set-Up
A lap top personal computer (PC) is needed to set the system up when it is installed at the customer sight. Set up
involves selecting the AC output voltage for either 120VAC or 240VAC via copper bus bar strapping on the EMI filter
and jumper plug position selection on the “Static Switch” printed circuit board, which is located on the left-hand side
panel in the “Static Switch” area. Each power module has two inverter outputs of 120VAC each, which can be
connected in parallel for 120V or series for 240VAC. The PC is needed to tell the processor the output voltage
strapping so that it can calculate output power correctly. In addition, the output voltage level can be programmed,
either 100, 110, 115, or 120VAC. The 240V connection will be twice this level, that is, 200, 220, 230, or 240VAC.
In addition, the ON-LINE or OFF-LINE, 50Hz/60Hz, AUTOMATIC or MANUAL restart mode can be selected. The
customer MUST use the lap top PC and service software set up program to input the number of power module
positions available in the receiver rack so as to obtain the correct display readings. The correct “Burden” resistor
set is set at the factory. In addition, the DC current sensor used to measure the DC input current changes from
model to model, thus the “Controller” must be programmed to match the kVA rating of the “Receiver” cabinet.
Owner’s Manual
Theory of Operation page 4 — 3