ETS-Lindgren 2090 Controller - Manual (Page 32)

Preparation for Use Model 2090 Multi-Device Controller
POWER REQUIREMENTS
The Model 2090 accepts any AC power source input within
the range of 115-230 VAC, 50/60 Hz. It is not necessary to
select a voltage. To apply AC power, use the three-
conductor power cable that is shipped with the controller.
When connected from the IEC 320 power inlet to an
appropriate AC power source, the instrument chassis will
be connected to the earth ground.
CAUTION: Before switching on, connect the protective
earth terminal of this instrument to the protective conductor
of the power cord. The power cord should only be
connected to a socket outlet provided with a protective
earth contact. Do not use an extension cord without a
protective earth connector. Never attempt to defeat any
safety feature of an electrical device or serious injury may
result.
The Model 2090's configuration and current settings are
backed-up by non-volatile RAM (NVM). The NVM
retains these settings in the event of power loss or power
down. Three (3) AAA alkaline batteries, located internally,
are needed for this memory back up. Refer to the
procedure in the section “NVRAM Battery Backup” in
Appendix B: Maintenance, for more information on
replacing these batteries.
NOTE: It is recommended that the batteries be replaced
annually to reduce the risk of potential memory loss.
32 © ETS-Lindgren– April, 2006
Revision G– P# 399199