300-R010-45G Datasheet, PDF (7/36 Pages) Magnetrol International, Inc. – Echotel® Model 300/301 Ultrasonic Non-Contact Transmitter For Level/Volume/Open Channel Flow

WIRING
NOTE: Do NOT attempt to operate this unit at voltages other
than as ordered from the Model Identification as it will dam-
age the unit.
NOTE: Proper routing of the wires into the 300/301 is criti-
cal to unit operation. The power and relay wiring should be
brought into the 300/301 through the 1" NPT conduit open-
ing at the back of the unit next to the transformer. All other
wiring (transducer, 4-20 mA, and RS-485) should be routed
through the 1" NPT conduit opening in the front of the unit.
No cables should be routed through the bottom center entry
in the base of remote-mounted Model 301 units.
TRANSMITTER POWER WIRING
1. Ensure that power source is turned off from unit.
2. Pull the power supply wires through the conduit
connection.
3. Connect the positive (hot) supply wire to the L1 on ter-
minal block TB1.
4. Connect the negative (neutral) supply wire to the L2/N
on terminal bock TB1.
5. Connect the ground wire to the green screw in the
housing base.
CAUTION: This instrument is grounded through green
head screw contact in the base. The power input must
include a ground wire connected to a good earth ground.
Failure to ground the instrument may allow a shock haz-
ard to exist!
U.S.
Line 1 (HI)
Line 2 Neutral
Black
White
Ground
Green/Yellow
Europe
Blue
Black
Green/Yellow
U.K.
Brown
Blue
Green/Yellow
Table 2
Wiring Colors By Country/Continent
NO
Relay 1 (TB2) ^CO
NC
NO
Relay 2 (TB3) CO
NC
L1 (+)
Input power (TB1) Not used
L2/N (–)
Figure 4
Power Supply Board Wiring
NC
CO _{Relay 3 (TB5)}
NO
NC
CO ^{Relay 4 (TB4)}
NO
7