RKI Instruments Beacon 410 - Manual (Page 21)

Beacon 410 Gas Monitor Operator’s Manual Wiring the Beacon 410 Gas Monitor • 17
Connecting the AC Power Source
NOTE: If you are using DC power as the primary power source, go to the next section,
“Connecting the DC Power Source”.
The AC in terminal strip will accept 24 - 14 AWG wire. When selecting wire to connect the
AC power source to the Beacon 410, be sure to meet the local electrical code. Also be
sure to use an appropriate circuit breaker in the AC line close to the Beacon 410 that
meets the local electrical code.
Perform the following procedure to connect the AC power source to the Beacon 410.
WARNING: Verify that the power source is unplugged or turned off before you continue with
this procedure.
1. Turn off or unplug all incoming power to the Beacon 410.
2. Open the housing door, then place the power switch in the OFF position.
CAUTION: The power switch does not control DC input power.
3. Locate the AC in terminal strip (see Figure 1 on page 5). The terminals are labelled L,
N
, and G for line, neutral, and ground respectively.
4. Install an appropriately rated cable bushing or conduit in the right-most conduit hub on
the bottom of the Beacon 410 housing.
5. Guide the AC power cord or wires in conduit through the right-most conduit hub on the
bottom of the Beacon 410 housing.
CAUTION: Do not route power and detector head wiring through the same conduit hub.
The power wiring may disrupt the transmission of the detector head signal to
the monitor.
6. Connect the AC wires to the AC in terminal strip as shown in Figure 9 below.
Figure 9: AC Power Wiring
Connecting the DC Power Source
WARNING: Verify that the power source is unplugged or turned off before you continue with
this procedure.
DC power may be used as a primary power source. It may also be used as a backup
power source with a 24 VDC battery if AC power is the primary power source. If your
220 VAC Wiring
AC In Terminal Strip
Earth Ground
N
G L2
G
N
AC Power
100/115 VAC
50 / 60 Hz
AC In Terminal Strip
100/115 VAC Wiring
Neutral
Earth Ground
Line (Hot) L L1 AC Power
220 VAC
50 / 60 Hz L