RKI Instruments GD-K11D - Manual (Page 14)

10 • Installation Model GD-K11D Operator’s Manual
Connecting AC power
1. Loosen the thumbscrew at the top of the housing.
2. Rotate the housing cover toward the bottom of the housing to gain access to the
terminal strip.
3. Verify that the Model GD-K11D’s power switch is in the OFF position.
4. Unscrew and remove the two screws that secure the terminal strip’s protective cover,
then remove the protective cover.
5. Guide the AC power cord through an unused conduit fitting at the bottom of the
housing.
6. Connect the AC line to the lower row of the terminal strip as shown in Figure 3.
7. Connect the AC line’s ground wire to the ground screw as shown in Figure 3. The
ground screw is below and to the left of the terminal strip.
8. If you do not plan to make any more wiring connections to the terminal strip, position
the protective cover over the terminal strip, then secure the cover with the two screws
you removed in step 4.
Connecting the Model GD-K11D to a controller or recorder
Perform the following procedure to connect a controller or recording device to the Model
GD-K11D. The output at the Model GD-K11D’s terminal strip is a 4 to 20 mA signal that is
proportional to the detection range.
1. Guide the wiring from the controller or recording device through an unused conduit
fitting at the bottom of the housing.
CAUTION: Do not route wiring from the AC power source and the controller or recorder
through the same conduit fitting. The power cable may disrupt the transmission of
the 4 to 20 mA signal to the controller or recorder.
2. Connect the leads to the upper row of the terminal strip as shown in Figure 3.
Connecting the Model GD-K11D to an external alarm device
CAUTION: The maximum current rating of the normally-open, dry contacts is 1 amp. If the
alarm device exceeds this rating, use the alarm contacts to control a relay with an
appropriate current rating.
1. Guide the wiring of the external alarm through an unused conduit fitting at the bottom
of the housing.
CAUTION: If the external alarm device is powered by AC current, do not route wiring from the
external alarm and the controller or recorder (if applicable) through the same conduit
fitting. The power wiring may disrupt the transmission of the 4 to 20 mA signal to
the controller or recorder.
2. Connect the leads to the lower row of the terminal strip as shown in Figure 3.