About Blanking Plug; Insulation Performance; Earthing Terminal; About Dedicated Cable (For Only Separate Type) - Oval ALTI mass CA00A Instructions Manual

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L -- 740 -- 28 -- E

10.6.3 About blanking plug

Since the blanking plug attached at shipping is the screw protecting parts at transportation, pay attention

not to install equipment under the status of connecting these parts.

Part of transmitter (PA0K) subject to insulation:

IS circuit terminals (separate detector board: TB20, TB21) - Enclosure

Withstand voltage condition: 500VAC, leak current: 3 to 5mA

Due to the built-in noise eliminator between the transmitter power source terminals (TB1' s L and N) and

output terminals (TB2, TB3 and TB4), and the enclosure respectively, complete insulation is not provided.

In case withstand voltage test is conducted across these parts, please conduct under the conditions

below.

Withstand voltage condition: AC200V or DC250V, leak current: 3 to 5mA

1. Use GND of power source terminal block or any of external grounding terminals.

2. Use wires of cross section area of 4mm2 min. (AWG11 min.) for grounding.

3. Coating color of the grounding wires shall be green or stripe of green and yellow.

4. Class D grounding is necessary.

5. In case external wirings are used, make sure that the grounding wire is connected with the earth

terminal cover and plain washer in the sketch below.

1. In case of separate type, a dedicated cable is used for connection between the sensor and

transmitter. Use of other cables are not allowed from the point of explosionproof.

2. Make sure to array the dedicated cable between the sensor and transmitter so that any current and

voltage, which attributable to electromagnetic induction or electrostatic induction and could impair

the IS (intrinsic safety) performance of the IS circuit, is never induced.

Cross recess pan head screw

Spring washer

Earth terminal cover

Plain washer

Fig.10.2

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