ABB ACQ810, Hardware Manual

Page: 84 / 134

84 Electrical installation
WARNING! As the inputs pictured above are not insulated according to IEC
60664, the connection of the motor temperature sensor requires double or
reinforced insulation between motor live parts and the sensor. If the assembly
does not fulfil the requirement,
•
the I/O board terminals must be protected against contact and must not be connected
to other equipment
or
•
the temperature sensor must be isolated from the I/O terminals.
Start interlock (XDI:A)
Terminal XDI:A must be jumpered to XD24:3 to enable the drive start.
Drive-to-drive link (XD2D)
The drive-to-drive link is a daisy-chained RS-485 transmission line that allows basic
master/follower communication with one master drive and multiple followers.
Termination activation jumper T (see section Jumpers above) next to this terminal block
must be set to the ON position on the drives at the ends of the drive-to-drive link. On
intermediate drives, the jumper must be set to the OFF position.
Shielded twisted-pair cable (~100 ohm, for example PROFIBUS-compatible cable) must
be used for the wiring. For best immunity, high quality cable is recommended. The cable
should be kept as short as possible; the maximum length of the link is 50 meters (164 ft).
Unnecessary loops and running the cable near power cables (such as motor cables) must
be avoided. The cable shields must to be grounded to the control cable clamp plate on the
drive as shown on page
86 .
The following diagram shows the wiring of the drive-to-drive link.
XD2D
...
1
T
J3
Termination ON
JCU
Drive 1
B
2
A 3
BG
N
D
XD2D
1
J3
Termination OFF
JCU
Drive 2
B
2
A 3
BG
N
D
T
XD2D
1
T
J3
Termination ON
JCU
Drive n
B
2
A 3
BG
N
D