4.1
8
95-8522
DETECTOR SEPaRaTION (OPTIONaL)
In applications where the PIRVOL must be installed
in a different location from a control device (such as
a transmitter), a junction box must be installed at the
PIRVOL location to make the electrical connection.
Refer to Figure 11 for a typical separation diagram.
Wiring Requirements for Detector Separation
Shielded four wire cable is recommended for
connecting the PIRVOL junction box to the transmitter.
Cable with a foil shield is recommended. The shield
of the cable should be open at the PIRVOL junction
box and connected to earth ground at the transmitter
junction box. Ensure that the shield wire is clipped
short and insulated with electrical tape to prevent
accidental grounding at the open end.
The maximum distance between the PIRVOL junction
box and the transmitter is limited by the resistance of
the connecting wiring, which is a function of the gauge
of the wire being used.
NOTE
It is important to maintain a minimum of +18
volts dc (including ripple) at the PIRVOL. When
determining the appropriate wire size for the
installation, refer to Figure 2. Be sure to take into
account the distance from the power supply to
the PIRVOL or to the transmitter and then to the
PIRVOL to ensure that the power requirements
are met.
Mounting and Connecting Procedure
for Detector Separation
The PIRVOL junction box can be mounted to a wall
or post, or it can be suspended by the conduit if this
does not result in excessive vibration. The junction
box should be electrically connected to earth ground.
1. Lubricate the sensor threads with low vapor
pressure silicone grease, then install the sensor
in the conduit entry of the junction box. It should
be tight to ensure an explosion-proof installation,
however, do
not
overtighten.
2. Connect the PIRVOL wires to the terminal strip in
the junction box.
3. Connect the cable leadwires from the transmitter
to the same terminals inside the separated
junction box.
Do not
ground the shield at the
junction box. Ground the sensor wire shield at the
transmitter end only.
4. Check the connections inside the junction box
and place the cover on the junction box.
5. Mount and wire the transmitter as described in the
instruction manual provided by the manufacturer.
CaLIBRaTE SWITCh
B2056
hOLD CaLIBRaTION MaGNET
aT OUTSIDE BaSE OF JUNCTION
BOx aT ThIS LOCaTION
TO aCTIVaTE CaLIBRaTION SWITCh
REMOTE LED
Figure 10—Junction Box Terminals and Calibration Switch
JUNCTION
BOX
SUITABLE WIRING.
MUST MEET ALL LOCAL CODES.
CONTROL DEVICE,
SUCH AS TRANSMITTER
PIRVOL
DETECTOR
B2030
Figure 11—Detector Separation
