2.20
To connect the instrument to the electrical supply, proceed as follows:
Note: to meet CE requirements for EMC it is necessary to fit the mains filter unit.
(See section 2.14)
1. Remove the instrument cover as described in Section 2.6.1(1).
2. The terminals for connecting the instrument to the electrical supply are located at the front
of the power supply unit (TB-A) and are protected by a plastic cover. Remove the single
screw attaching the cover to the terminal block and remove the cover.
3. Loosen the screws located on the left of the terminal block on the terminals marked
'SUPPLY 160VA MAX'
4. Bring the power supply cable into the nearest glandhole and insert the wires into their
respective terminals and tighten the screws.
CAUTION
A suitable strain relief gland must be fitted to the cable entry hole in the
case to prevent abrasion of the cable by the edges of the hole, and to
avoid straining the electrical connections.
Cable entries must also be weatherproof to IP 54 or NEMA 4.
5. Replace the cover, taking care not to over-tighten the screw. Damage to the cover could
result from too much force being used.
2.6.3 Ground (Earth) Connections
The analyser contains intrinsically safe circuits. For hazardous area applications the grounding via
the power supply may be inadequate. In such cases a separate ground connection will be required
to comply with relevant standards and is made to the grounding point on the lower left side of the
enclosure (see Figure 2.8)
Both the Control unit and Interface unit (if used) require grounding.
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