REMOTE ELECTRONICS INSTALLATION
Remote electronics must be used where high process tem-
peratures prohibit integral mounting of the electronics. A
remote electronics also allows more convenient servicing
when the transducer is mounted at an inconvenient location.
Figure 13
Remote Installation
Transducer
Housing
Remote
Electronics
Mounting
Bracket
Process
Vessel
Coaxial
Cable
REMOTE ELECTRONICS INSTALLATION cont.
1. Install electronics housing using mounting bracket.
Provide adequate clearance to remove housing cover.
2. Remove housing cover.
3. No. 14 AWG wire size is recommended for power and
control circuit wiring.
4. Route power and control circuit through side housing
connection.
5. Run power leads to power terminal strip on left side of
PC board. Refer to Figure 11 on page 9.
6. Run control circuit leads to terminal block TB1.
7. Run coaxial cable from transducer or remote transducer
termination board through the bottom housing
connection, as shown in Figure 13 below.
8. Plug coaxial cable into amplifier board as follows (for 91S):
Cables from OUT1 and OUT2 on remote transducer ter-
mination board plug into J1 and J2 on the amplifier
board in any order.
9. Dress wiring to ensure no interference or contact with
cover or circuit board components.
OBSERVE ALL APPLICABLE ELECTRICAL CODES AND
PROPER WIRING PROCEDURES.
10. Prevent moisture seepage into the enclosure by
installing approved seal-drain fittings in the conduit run
leading into the unit.
11. Replace housing cover.
REMOTE TRANSDUCER INSTALLATION
1. Screw transducer into tank opening using pipe com-
pound or thread tape. If flanged, bolt unit to mating
flange with proper gasket.
NOTE: Refer to Coaxial Cable Installation section below
before installing cables.
2. To prevent cable damage, DO NOT remove transducer
from tank with coaxial cable connected to the amplifier.
COAXIAL CABLE INSTALLATION
Transducers are furnished with dual coaxial cables, which
must be run in conduit to the electronics.
The coaxial cables from the transducer are terminated
inside the remote housing. The transducer cable will termi-
nate in the remote housing at IN1 and IN2. The remote
cable will connect at OUT1 and OUT2 in the remote housing
and terminate at J1 and J2 on main electronics. (Coaxial
cable extensions must be run in conduit.) Refer to Figure 9
on page 8.
CAUTION:
In hazardous areas, do not power the unit
until the conduit is sealed and the enclosure cover is
screwed down securely.
CAUTION:
Never tighten transducer to tank connection
by turning housing. Use wrench on transducer mounting
nut flats. Use thread tape or suitable pipe compound on
threads. Do not over tighten.
CAUTION:
To retain explosion proof/vapor proof rating,
coaxial cable must be run in properly sealed conduit.
L
E
D
2
L
E
D
1
D
R
Y
W
E
T
T
IM
E
D
E
L
A
Y
R31
J1
J2
M
A
L
F
T
E
S
T
S1
W
E
T
T
E
S
T
S2
T
B
1
V+ COM
Z1
P
2
L
O
W
H
IG
H
T
IM
E
D
E
L
A
Y
D
IR
E
C
T
IO
N
P
1
R
IS
IN
G
F
A
L
L
IN
G
F
A
U
L
T
C
U
R
R
E
N
T
P4
L
E
D
2
L
E
D
1
D
R
Y
W
E
T
T
IM
E
D
E
L
A
Y
R31
J1
J2
M
A
L
F
T
E
S
T
S1
W
E
T
T
E
S
T
S2
T
B
1
V+ COM
Z1
P
2
L
O
W
H
IG
H
T
IM
E
D
E
L
A
Y
D
IR
E
C
T
IO
N
P
1
R
IS
IN
G
F
A
L
L
IN
G
F
A
U
L
T
C
U
R
R
E
N
T
P4
Figure 12
Dual Point 92S Amplifier Boards
TWO-WIRE MODELS
TWO-WIRE MODELS
INSTALLATION/WIRING cont.
10
TOP POINT
BOTTOM POINT
