Planning the electrical installation56Selecting the control cablesAll control cables must be shielded.Use a double-shielded twisted pair cable (Figure a, e.g. JAMAK by NK Cables,Finland) for analogue signals. This type of cable is recommended for the pulseencoder signals also. Employ one individually shielded pair for each signal. Do notuse common return for different analogue signals.A double-shielded cable is the best alternative for low-voltage digital signals butsingle-shielded twisted pair cable (Figure b) is also usable.Run analogue and digital signals in separate, shielded cables.Relay-controlled signals, providing their voltage does not exceed 48 V, can be run inthe same cables as digital input signals. It is recommended that the relay-controlledsignals be run as twisted pairs.Never mix 24 VDC and 115/230 VAC signals in the same cable.Relay cableThe cable type with braided metallic screen (e.g. ÷LFLEX by LAPPKABEL,Germany) has been tested and approved by ABB.Control panel cableIn remote use, the cable connecting the control panel to the drive must not exceed 3metres (10 ft). The cable type tested and approved by ABB is used in control paneloption kits.aA double-shielded twistedpair cablebA single-shielded twistedpair cablePhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
