Aquametrix 2200R ORP Analyzer/Controller User Manual - Manual (Page 6)

Model 2200R Page 4
3.4 Electrical Connections
The 2200P is available in 3 different power options, 120Vac, 240Vac, and 24Vdc. Refer to
following sections for connecting the input power.
120Vac and 240Vac
3.4.1
To access the terminal strips open the door of the instrument and then unscrew the
captive retaining screw near the upper right hand corner of the panel. Now swing
open the panel to reveal the terminal strip on the power supply circuit board and the
smaller terminal strip on the back of the main circuit board.
CAUTION: The instrument operates from line voltage. This constitutes a
possible shock hazard. Ensure that line power is removed before attempting
connections. Note: A separate source of line power may have been
connected to the floating relay contacts.
3.4.2
The terminal strip on the power supply board at the back of the instrument is
labeled for line power, relay outputs and analog outputs. Connect the wiring in
accordance with this labeling. (Refer to Fig.1A)
Terminals 4 and 5 are wired directly to the input line voltage. These terminals can
be used to supply power to the relays. Use the common ground of Terminal 1as the
ground for the auxiliary devices. A separate source of power can also be used to
provide power to the relays. Ensure that the circuit breaker supplying the instrument
is able to supply enough current to the auxiliary devices, to ensure proper operation
of the instrument.
CAUTION: Connecting the line voltage to incorrect terminals may cause serious damage.