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Operating manual ZX09/20/21-Series
5.5.6 Connection of an Encoder to the SSI-Interface
Fig. 18 shows the connection of an encoder to the SSI interface. The cables of the
SSI encoder are connected to the control system via a shielded cable
twisted in pairs. Connect the cable shield at one end as close as possible
to the terminals of the control with a low-resistance shielding rail at PE potential
(see Fig. 18). The data signal is connected to terminals D+ and D- (or 2+ and 2- if
the RS 485 connection has been reconfigured accordingly via the function block
in EX_PRESS 5). The positive signal is connected to D+ (2+) and the
negative signal to D- (2-). The clock signals of the encoder are connected to the
terminals Ck+ and Ck-, or 1+ and 1-.
Fig. 18: Connection of an encoder
1+
1-
2+
2-
Ck+
Ck-
D+
D-
RS-485
SSI
Shield rail
(PE)
