Infranor CD1-a, Manual, Page: 28 / 45

28
CD1-a
Chapter 4 – Connections
2.5 - INPUT COMMAND AND SERIAL LINK CABLES
The analog input command signal CV requires a pair twisted and shielded cable. The shield must have a "360°"
connection via metallic connectors at both ends.
The input command (CV) wiring must be made according to the polarity between the controller and the amplifier
(CV+ on "diff high" of the controller). The logic 0 Volt is directly connected to the amplifier housing. The earth
connection continuity is ensured by the fastening screws of the front panel sub-D connectors.
But the amplifier 0
Volt and the controller 0 Volt MUST be connected together by means of a wire. The shield MUST NEVER
be used as a conductor of the 0 Volt potential
.
The serial link cable must also be shielded according to the above mentioned shielding recommendations.
2.6 – CONNECTION CABLES OF THE BRAKING RESISTOR
The connection cable to the braking resistor housing must be able to bear high voltage and temperature such as
600 V and 105° C.
Recommended cable = UL 1015 Gauge 14.
Fastening torque on the housing connector: dp = 0.9 Nm.
3 - REQUIREMENTS OF COMPLIANCE WITH THE UL STANDARDS
This UL listing requires some conditions to be fulfilled by the installer of the drives.
3.1 – CONNECTION BY MEANS OF FASTON SOCKET
The installer must use a UL listed quick connect for ground connections (0.250 inches or 6.35 mm wide nominal)
on all drives equipped with FASTON sockets.
On drives equipped with a screwed ground connector, the connection must be made via UL listed sockets.
3.2 – 24 V SUPPLY
The end user has to provide a 24 VDC isolated power supply (e.g. with isolated transformer) for the auxiliary
supply input, protected by a 4 A UL listed fuse.
3.3 – POWER SUPPLY AND UL FUSE RATINGS
The fuse type recommended for motor applications is class RK5. The maximum short-circuit power of the mains
must not exceed 5000 Arms at a voltage of 480 V, when protected by a UL fuse of type RK5.
On CD1a-400/I drives, the fuse ratings must be the following:
CD1-a 400/1.8 to 7.2 400/14 400/30 and 45 Multiaxis
BUSSMANN
Class RK5
Type FRS-R FRS-R-4 FRS-R-8 FRS-R-20
∑
×
N
amplifier
I
1
3 , 0
LITTELFUSE
Class RK5
Type FLSR-ID FLSR2ID FLSR8ID FLSR20ID
∑
×
N
amplifier
I
1
3 , 0
For a multiaxis application with N drives, the fuse rating is calculated by the formula given in the table above. But
a rating of 20 A must not be exceeded on 400/1.8 A to 14 A drives and 40 A must not be exceeded on 400/30 and
45A (see
chapter 4, section 3.5 ).
CAUTION !
The command cables (input command, serial link, position, resolver) as well as the power cables MUST
connected and disconnectd with the amplifier TURNED OFF.
Recall: The power voltage can remain several minutes on the capacitors terminals.
A contact under high voltage may involve severe physical damage.