60Measuring the insulation of the motor and motor cable .................................
60
Compatibility with IT (ungrounded), corner-grounded delta, midpoint-grounded delta,
and TT systems ...................................................................................
60EMC filter and ground-to-phase varistor ...................................................
61Corner-grounded and midpoint-grounded delta systems ................................
61
When to disconnect EMC filter and ground-to-phase varistor: TN-S, IT, corner-
grounded delta, and midpoint-grounded delta systems .................................
62Guidelines for installing the drive to a TT system ........................................
63Disconnecting EMC filter and ground-to-phase varistor .................................
63Identifying the earthing system of the electrical power network ........................
64Connecting the power cables ...................................................................
64Power cable connection diagram ...........................................................
65
Preparing the cable ends for connection and making 360-degree grounding at the
cable entry plate ...............................................................................
67Power cable connection procedure .........................................................
68Connecting the control cables to the internal control unit ...................................
68Connecting external power supply wires to the control units ...........................
69Installing option modules ........................................................................
70Option slot 2 (I/O extension modules) ......................................................
71Option slot 1 (fieldbus adapter modules) ..................................................
71Wiring the optional modules .................................................................
71Connecting an external control panel ..........................................................
72Connecting a remote panel, or chaining one panel to several drives .....................
72Connecting a PC ..................................................................................
8 Control unit
73Contents of this chapter ..........................................................................
73Layout ..............................................................................................
75Default I/O connection diagram .................................................................
76Switches ........................................................................................
76Additional information on I/O connections ....................................................
76PNP configuration for digital inputs (X2 & X3) ............................................
77NPN configuration for digital inputs (X2 & X3) ............................................
77Connection for obtaining 0…10 V from analog output 2 (AO2) .........................
78Connection examples of two-wire and three-wire sensors to analog input (AI2) ....
78DI5 as frequency input ........................................................................
78DI6 as PTC input ..............................................................................
78AI1 and AI2 as Pt100, Pt1000, Ni1000, KTY83 and KTY84 sensor inputs (X1) .....
79Safe torque off (X4) ...........................................................................
80Technical data .....................................................................................
9 Installation example in Rittal VX25 cabinet
83Contents of this chapter ..........................................................................
83Limitation of liability ...............................................................................
83Safety ...............................................................................................
84Required parts .....................................................................................
84Required tools .....................................................................................
84Overall flowchart of the installation process ..................................................
85Installing the drive module and LCL filter module into a cabinet ...........................
86Connecting the power cables and installing the shrouds (option +B051) ................
88Installing the roof and door (Rittal parts) ......................................................
Table of contents 7