IKA SMRA + MRA, User Manual

Page: 16 / 40

SMRA - SSI and BiSS
4.2 M12 8-pin connector
Male, frontal side
A coding
4.3 Connection of the shield
For signals transmission always use shielded cables. The cable shielding must be
connected properly to the metal ring nut of the connector in order to ensure a
good earthing through the frame of the device.
4.4 Ground connection
Minimize noise by connecting the shield and/or the connector housing and/or
the sensor to ground. Make sure that ground is not affected by noise. The
connection point to ground can be situated both on the device side and on
user’s side. The best solution to minimize the interference must be carried out by
the user.
4.5 Zero setting/Preset input
The output position information at a decided point in the shaft rotation can be
set either to 0 (SSI interface) or to a desired value called preset (BiSS C
interface; the preset value has to be set next to the
Preset
registers, see on page
27). The Zero setting/Preset input allows the operator to activate the zero/preset
value through an input signal sent by a PLC or other controller. This can be very
useful for setting -for instance- the zero position of both the sensor and the
machine. If not used, connect the Zero setting/Preset input to 0Vdc. To activate
the zero setting/preset function, connect the Zero setting/Preset input to +Vdc
for 100 µs at least, then discVdc; normally voltage must be at 0Vdc;
Zero setting/Preset must be set after Counting direction. We suggest setting the
zero/preset when the encoder is in stop.
NOTE
In the BiSS interface the preset can be activated also by using the
Save
parameters and activate Preset
function of the
Command
register. For
detailed information please refer to the Preset registers on page 27 and to the
Command
register on page 30.
MAN SMRA SSI_BiSS E 1.4.odt 4 – Electrical connections 16 of 40