MPS Doc: M359_USER_MANUAL REV G January 17, 2010 Page 14 of 30
disconnected from the UPS input and the M359 is forced to operate from the internal
battery (thus simulating an AC input failure). In this mode, the INPUT FAIL red LED
(17) should be on, the ON BATT yellow LED (16) should blink, the OUTPUT OK green
LED (21) should remain on, and the Bar-graphs should indicate the Load and Battery
charge level.
5.3. Local Control (Using the Front Panel switches).
If the M359 is controlled from its front panel switches, the remote ON/OFF switch should be
in the On position and the remote UPS/BY-PASS selector in the UPS position. (If the Remote
Switches function is not used, the mating connector of J4, with the jumpers described in
Paragraph 5.1 above, should be installed on J4). Please note that the M359 will turn On only
if AC Input is available. The M359 will remain On (using Battery power) if AC input fails, but it
will not start on Battery power alone.
5.3.1.
PWR ON/OFF Switch (2).
When in the Off position (down) this switch disconnects both Input and Output of the
M359 and turns off all functions (regardless off anything else). When On, it enables the
M359. The actual Operation Mode (UPS, By-Pass or Test) will depend on the setting of
the other switches and controls. In order to turn-on the M359 both the PWR ON/OFF
Switch and the INPUT Switch must be in the upper position (and AC Input must be
available).
Once the M359 is On
, all Modes are accessible and depend only on the
setting of the INPUT and OUTPUT switches (the exact sequence is not important).
5.3.2.
INPUT UPS/BY-PASS Switch (7).
When this switch is in the By-Pass position (down), it disconnects the AC Power from
the UPS input and the UPS (if already on and running) will continue to operate on
Battery power. This state is useful as a
Test Mode
for the UPS functionality. If
both
Input and Output
UPS/BY-PASS switches are in the By-Pass position (down) and the
PWR ON/OFF switch (2) is On (up), the M359 will be in the By-Pass mode. In this
mode AC power is routed (by-passed, internal to the M359) from the Input connector J1
to the Output connector J2, via the isolation transformer and passive filters and all UPS
functions are disabled.
5.3.3.
OUTPUT UPS/BY-PASS Switch (8).
When this switch is in the BY-PASS position (down), it disconnects the UPS AC Output
from the Output connector J2. The UPS will be in the Stand-by mode, AC Output will be
off, but the communication ports, the front panel display and the Battery Charger will
remain active. This state is useful if the battery needs charging but the presence of AC
power on the output connector J2 is undesired. If both the INPUT and OUTPUT
UPS/BY-PASS switches are in the By-Pass position (down) and the PWR ON/OFF
switch (2) is On (up), the M359 will be in the By-Pass mode (see 5.3.2 above).
