RKI Instruments Beacon 110 - Manual (Page 20)

16 Beacon 110 Operator’s Manual
6. Connect the leads from the external alarm to the appropriate terminals on the alarm
terminal strip as shown in Figure 9 to obtain the desired operation.
Figure 9: Typical Alarm Device Wiring
7. Repeat steps 5 and 6 for additional alarm devices.
Connecting Recorders
Perform the following procedure to connect an analog signal recording device to the
Beacon 110. The output at the recorder output terminals is a 4 - 20 mA signal that is
proportional to the detection range of the detector head connected to the Beacon 110.
1. Turn off or unplug incoming power to the Beacon 110.
2. Open the housing door, and locate the recorder output terminals on the controller
terminal strip. See Figure 1 “Beacon 110 Component Location” on page 4 to assist
you in locating the recorder output terminals. They are labelled 4 - 20 mA OUTPUT +
and 4 - 20 mA OUTPUT -.
3. Place the power switch in the off position.
CAUTION: The power switch does not control DC input power.
4. Install an appropriately rated cable bushing or conduit in the left conduit hub on the
bottom of the Beacon 110 housing. This hub is typically used for power wiring and
may already have conduit or other fittings installed because of this.
5. Guide the wiring from the recording device through the left conduit hub on the bottom
of the Beacon 110 housing.
6. Connect the leads from the recording device to the analog output terminal strip as
shown in Figure 10 below.
Figure 10: Recorder Output Wiring
NO NC C
Beacon 110
Alarm Terminal Strip
(+) H
(-) N
External Power
Source
External Alarm Device
ALARM-1
NO NC C
FAIL
NO NC C
ALARM-2
4-20 mA
OUTPUT
Recording Device,
500 Ohms Max
Impedance