301-R010-400 datasheet(7/36 Pages) MAGNETROL

7 / 36 page

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.

Table 2

Wiring Colors By Country/Continent

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!

WIRING

U.S.

Europe

U.K.

Line 1 (HI)

Black

Blue

Brown

Line 2 Neutral

White

Black

Blue

Ground

Green/Yellow

Figure 4

Power Supply Board Wiring

Relay 2 (TB3)

Relay 1 (TB2)

L1 (+)

L2/N (–)

Input power (TB1)

Relay 4 (TB4)

Relay 3 (TB5)

Not used

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