38
Installation Instructions / ACS-8
7.1.3 Potential separation and terminating resistance
Potential separation
One non-floating interface must be used for each RS 485 cable. The other interfaces must be floating. The
best position for the non-floating interface, is in the middle of the RS 485 cable. The ACS-8 fitted with the
non-floating interface must have a good ground connection. If this is not the case, another ACS-8 should
be selected instead. A good ground is more important than the central location on the RS 485 cable.
Terminating resistors
The terminating resistors must be placed at the
first
and the
last
device of a line. Which device is the first
or last device or any device within the line depends on the type of wiring.
Caution! Malfunction possible!
Star-shaped cabling of the devices is not allowed.
Summary of Contents for ACS-8
Page 2: ... VdS Approval Z 105009 class C ...
Page 16: ...16 Installation Instructions ACS 8 ...
Page 28: ...28 Installation Instructions ACS 8 ...
Page 29: ...Installation Instructions ACS 8 29 ...
Page 76: ...76 Installation Instructions ACS 8 Connection component mounting diagram ...
Page 92: ...92 Installation Instructions ACS 8 15 2 ACS 8 Structure ...
Page 122: ...122 Installation Instructions ACS 8 Connection diagram for 026064 Keypad sm plastic housing ...
Page 123: ...Installation Instructions ACS 8 123 ...
Page 124: ...124 Installation Instructions ACS 8 ...
Page 130: ...130 Installation Instructions ACS 8 ...
Page 140: ...140 Installation Instructions ACS 8 ...