Electrical Installation - ABB C1900 Series Installation Manual

4 ELECTRICAL INSTALLATION

Warnings.
• Instruments not fitted with the optional internal on/off switch and fuse must have a disconnecting device such as a switch
or circuit breaker conforming to local safety standards fitted to the final installation. It must be fitted in close proximity to
the instrument within easy reach of the operator and must be marked clearly as the disconnection device for the
instrument.
• Remove all power from supply, relay and any powered control circuits and high common mode voltages before accessing
or making any connections.
• Use cable appropriate for the load currents. The terminals accept cables up to 14AWG (2.5mm
• The instrument and all inputs and outputs conform to Mains Power Input Insulation Category II.
• All connections to secondary circuits must have basic insulation.
• After installation, there must be no access to live parts e.g. terminals.
• Terminals for external circuits are for use only with equipment with no accessible live parts.
• If the instrument is used in a manner not specified by the Company, the protection provided by the equipment may be
impaired.
• All equipment connected to the instrument's terminals must comply with local safety standards (IEC 60950, EN601010-1).
Notes.
• Always route signal leads and power cables separately.
• To comply with Underwriter Laboritories (UL) certification, route signal leads and power cables in earthed (grounded),
flexible metal conduit.
• Use screened cable for signal inputs and relay connections. Connect the screen to the earth (ground) stud – see Fig. 4.10.
• The terminal blocks can be removed from the main PCB when making connections – see Fig. 4.1. Before removing a
module, note its position.
• If wall- or pipe-mounting to NEMA 4X hosedown standard is required, suitable cable glands must be used to prevent
water ingress.
Unplug
1
Module
6
Fig. 4.1 Removing Terminal Block Assembly
2 ).
Release Clip
2
Remove Terminal
3
Block Assembly