ABB ACQ810-04 Hardware Manual page 66

66 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,
• all I/O 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
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, e.g. 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 metres
(164 ft). Unnecessary loops and running the cable near power cables (such as motor
cables) must be avoided. The cable shields are to be grounded to the control cable
clamp plate on the drive as shown on page 67.
The following diagram shows the wiring of the drive-to-drive link.
XD2D
Termination ON
JCU
Drive 1
Jumpers
XD2D
Termination OFF
JCU
Drive 2
above) next to this terminal
XD2D
...
Termination ON
JCU
Drive n