1.5
Wiring
Caution
The Through-Air Radar transmitter operates at volt-
ages of 20-36 VDC (GP), 20-28.6 VDC (IS) and 20-36
VDC (XP). Higher voltage will damage the transmitter.
Wiring between the power supply and the Through-Air
Radar transmitter should be made using 18-22 AWG
shielded twisted pair instrument cable. Within the trans-
mitter enclosure, connections are made to the terminal
strip and the ground connections. The directions for
wiring the Through-Air Radar transmitter depend on the
application:
• General Purpose or Non-incendive (Cl I, Div. 2)
• Intrinsically Safe
• Explosion Proof
WARNING!
Explosion hazard. Do not disconnect equipment
unless power has been switched off or the area is
known to be non-hazardous.
1.5.1 General Purpose or Non-incendive (Cl I, Div. 2)
A general purpose installation does not have flammable
media present. Areas rated non-incendive (Cl I, Div. 2)
have flammable media present only under abnormal con-
ditions. No special electrical connections are required. If
flammable media is contained in the vessel, the transmitter
must be installed per Cl I, Div. 1 standards of
area classification.
To install General Purpose or Non-incendive wiring:
1. Remove the cover to the wiring compartment of the trans-
mitter. Install the conduit plug in the unused opening.
2. Install a conduit fitting and pull the supply wires.
3. Connect shield to an earth ground at power supply and
leave floating at the transmitter.
4. Connect an earth ground wire to the nearest green ground
screw. (Not shown in illustration.)
5. Connect the positive supply wire to the (+) terminal and
the negative supply wire to the (-) terminal.
6. Replace the cover to the wiring compartment of the trans-
mitter.
1.5.2 Intrinsically Safe
An intrinsically safe (IS) installation potentially has flam-
mable media present. An approved IS barrier must be
installed in the non-hazardous (safe) area.
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