Cable Distances - WEG CFW700 Manual Del Usuario

Table 3.2: Technical specifications for the encoder and the encoder cable
Characteristics
Power supply
Channels
Signals
Encoder
Output circuit
Isolation
Pulses
Frequency
Type of cable
Connection
Encoder
cable
Distance
Isolation
Length
Follow instructions below for the proper installation of the control wiring:
1. Wire gauge: 0.5 mm² (20 AWG) to 1.5 mm² (14 AWG).
2. Maximum tightening torque: 0.50 N.m (4.50 lbf.in).
3. Use shielded cables for the connections in XC1 and run the cables separated from the
remaining circuits (power, 110 V / 220 Vac control, etc.), according to
Distances on page 23. If control wiring must cross other cables (power cables for instance),
make it cross perpendicular to the wiring and provide a minimum separation of 5 cm (1.9 in)
at the crossing point.
Refer to item 3.2.6 Cable Distances on page
Inverter
side
(a) Cable shield connection
4. Relays, contactors, solenoids or coils of electromechanical brakes installed close to the
inverter may eventually create interferences in the control circuitry. To eliminate this effect,
RC suppressors (with AC power supply) or free-wheel diodes (with DC power supply) shall
be connected in parallel to the coils of these devices.

3.2.6 Cable Distances

The power cables and control cables must be separated (relay output cables and other control
cables) according to Table 3.3 on page
5 V
2 channels in quadrature (90º) + zero pulses with complementary outputs
(differentials) or open-collector.
A, A, B, B, Z and Z
Available for 2 channels: A, A, B, B.
If the channel zis not used, leave the terminals XC1: 6 and 7 not
connected. Noother setting are necessary.
Linedrive type, push-pull or open-collector. Maximum voltage of 12 V.
Electronic circuit isolated from the encoder frame.
Recommended number of pulses per rotation = 1024 ppr.
Maximum allowed = 100 kHz.
Balanced cable shield (for differential signals operation).
The cable shield must be connected to ground through devices on
control shield plate (see Figure 3.5 on page
≥ 25 cm of other wiring.
Use metal conduit.
Maximum = 10 m.
23, for the proper cable distances.
Isolate with tape
Do not ground
Figure 3.7: (a) and (b) Shield connection
24.
Installation and Connection
Specifications
21).
item 3.2.6 Cable
(b) Connection sample of the shield to
ground
CFW700 | 23