RKI Instruments Beacon 200 RIg Monitor, H2S/H2S - Manual (Page 17)

Beacon 200 Rig Monitor Operator’s Manual • 12
NOTE: The alarm 2 channel relays may be set to operate as individual
channel fail relays. See “Configure Channel Settings Menu” on
page 29 for instructions.
• Common relays. The three common relays, alarm 1, alarm 2, and fail,
are to the left of the controller terminal strip (see Figure 1). These relays
are common for both channels.
For example, the alarm 1 common relay energizes if either channel 1
or channel 2 recognizes an alarm 1 condition. The common alarm 1
relay is factory wired to the strobe/horn and is not available for
customer use.
Fuses
There are two DC fuses that are used in the Rig Monitor. They are located
directly to the left of the controller terminal strip. They cut off the incoming
DC power in the event of a short circuit or other electrical fault which
causes a high current draw in the Rig Monitor. They are housed in vertical
fuse holders and are held in the holder by a quarter turn cover. They are
labelled as F2 (top fuse) and F3 (bottom fuse) on the PCB silk-screen and
are rated at 3 A, 250 V.
Power Switch
The power switch is located above the relays and to the left of the DC fuses
(see Figure 1). The power switch turns the incoming DC power source on
and off at the Rig Monitor. When the switch is up, the power switch is on.
Power Converter
The power converter is mounted to the power supply mounting plate with
standoffs. The power supply mounting plate is located behind the display
PCB and is mounted to the main PCB with four standoffs. The power
converter takes 12 VDC voltage supplied to the Rig Monitor and converts it
to 24 VDC which is used to run the Rig Monitor.