Intek RheoVac 940 User Manual
Page 14
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Pull wires through the conduit. Wire for power connection must be at least 24 gauge. After
pulling the wire, pot the conduit or wires near the enclosure if there is any possibility of
water from condensation or spray entering the enclosure through the conduit.
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CAUTION: The electronics are not protected against condensed liquid water inside the
enclosure. Be sure conduit interfaces are dry or sealed at the instrument to prevent
condensation that may be present in conduit lines from entering the enclosure.
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Make wiring connections. Power should be off at this time. Refer to Figure 9 for RheoVac
monitor wiring detail. Make power and transducer connections first on the lower circuit
board. Next connect the 4-20 mA signal wires at JP3 and the two status output wires at JP7.
There are no other terminals used on the upper board connector JP7.
.
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WARNING: Verify the wiring. The equipment can be permanently damaged if not wired as
instructed in this manual.
Wire Color
Label
Wire Color
Label
Wire Color
Label
Drain W ire (Black)
A
Red
H
Black/Brown Stripe
O
Brown
B
Yellow
I
Green Stripe
P
Orange
C
Pur ple
J
Black Stripe
Q
Blue
D
Gray
K
Red Stripe
R
W hite
E
Brown Stripe
L
Yellow Stripe
S
Green
F
Orange Stripe
M
Purple Stripe
T
Black
G
Blue Stripe
N
Gray Stripe
U
×
Install serial communication interface (see Figure 11, Pg. 14). Connections are made to the
serial communication receptacle with a cable with six-position RJ-11 plugs (phone type
jacks) supplied as an accessory. When using the RS-232 output, plug the RJ-11 connector
of the supplied cable into the RheoVac unit’s RS-232 receptacle. Plug the other end of the
RJ-11 cable into the provided RJ-11 to DB-9 adapter. The DB-9 adapter should then be
plugged into any standard IBM-PC compatible RS-232 port. Table II and Figure 11 provide
information on the connections.
Usually an RS-422 signal is converted to RS-232 before it is connected to a PC. The
converters do not have a standardized pin assignment, so use of the RS-422 output is less
straight-forward. The DB-9 pin out shown in Table II applies to an interface module,
QCOM-2, made by QSI Corporation. Other modules may have different wiring. Contact the
factory if you need assistance in using the RS-422 output.
Please note, the transmitter supports only one communications type at a time.
Close the lid of the enclosure. Make sure it is tight enough to make a good seal against the
gasket and ensure all other enclosure openings are completely watertight.