15
Beacon 110 Rig Monitor Operator’s Manual
6. Connect the leads from the external alarm to the appropriate terminals on the alarm terminal
strip as shown in Figure 8 to obtain the desired operation.
Figure 8: Typical Alarm Device Wiring
7. Repeat steps 5 and 6 for an additional alarm device.
Connecting Recorders
Perform the following procedure to connect an analog signal recording device to the Rig Monitor.
The output at the recorder output terminals is a 4 - 20 mA signal that is proportional to the detection
range of the H
2
S detector head connected to the Rig Monitor’s Fail or Alarm 2 terminals. The
Alarm 1 terminals are factory wired and not available for field use.
1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery.
2. Open the housing door, and locate the recorder output terminals on the controller terminal
strip. See Figure 1 to assist you in locating the recorder output terminals. They are labelled
4 -
20 mA
and
4 - 20 mA OUTPUT -.
3. Place the power switch in the off position.
4. Install an appropriately rated cable bushing in the Rig Monitor housing. Both factory supplied
conduit hubs are used in the Rig Monitor, so you will need to drill a hole in the housing for a
conduit hub and cable bushing.
CAUTION:
Only use the two factory installed conduit hubs on the bottom of the housing for
wire entry into the housing. Do not drill the housing for any reason. See “Routing
Wiring Into the Beacon 110 Housing” on page 14 for more information.
5. Guide the wiring from the recording device through the new cable bushing.
6. Connect the leads from the recording device to the analog output terminal strip as shown in
Figure 9 below.
Figure 9: Recorder Output Wiring
NC C
NC
NO
C
ALARM-2
Beacon 110 Alarm
Terminal Strip
Factory
Wired
(-) N
External
Power
Source
(+) H
ALARM-1
C NO
FAIL
NC
NO
External Alarm Device
4-20 mA
OUTPUT
Recording Device,
500 Ohms Max
Impedance
