Electrical Connections - Renishaw ATOM Installation Manual

Electrical connections

Grounding and shielding
FPC readhead
FPC cable
Shield
(recommended)
For more information on FPC contact your local Renishaw representative.
Cable readhead
Connector / interface
Shield
IMPORTANT: The shield should be connected to the machine earth (Field Ground).
NOTE: Maximum cable length between interface and customer electronics is 25 m for ACi and Ri and 50 m for Ti.
(Maximum length for Ti with 40 or 50 MHz clocked output is 25 m).
68 ATOM linear encoder system
ACi / customer
electronics
5 V
Output
signals
0 V
Customer
electronics
5 V
Output
signals
0 V
Recommended signal termination
Digital outputs
Interface
A B Z E+
Cable Z = 120R
0
A B Z E−
Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.
Analogue outputs
V V V +
0 1 2
120R
V V V −
0 1 2
Remote CAL operation
CAL
Remote CAL operation is possible via the CAL pin.
For applications where no interface is used, remote
CAL operation is essential.
0 V
0 V
Customer
220 pF
electronics
120R
220 pF
0 V