MicroE MTE Series - Manual (Page 16)

Page 16
Appendix C
Interface Cable Requirements
4. Grounding:
The diagrams below show how to make the connections when the encoder's connector is plugged into the
customer's controller chassis. If a customer-supplied extension cable is used, it should be a double shielded
cable with conductive connector shells and must provide complete shielding over the conductors contained within
it over its entire length. Furthermore, the shields should be grounded at the connection to the controller chassis
the same way as the encoder connectors in the diagrams below.
5 Volts
0 Volts
Power
Supply
5 Volts
0 Volts
Electrically conductive
mechanical connection
(as supplied by MicroE Systems).
POWER
SUPPLY
INNER SHIELD:
Insulated from outer shield, sensor case, and
connector housing. Connected to circuit common
internally as supplied by MicroE Systems
OUTER SHIELD: Connected to
sensor and connector housings
4.1 Sensor mounted with good electrical contact to a well-grounded surface (preferred)
9 - pin D-sub connector grounding: The encoder's connector shell must be in contact with the customer-supplied
mating connector, which must be isolated from the controller's ground. If a customer-supplied shielded cable
connects the encoder to the controller, then the outer shield on the customer-supplied cable must be isolated
from the controller's ground.
The sensor mounting surface must have a low impedance (DC/AC) connection to ground. The encoder sensor
mounting surface may have to be masked during painting or anodizing to insure good electrical contact with the
sensor.
NOTE:
For best performance, isolate the encoder outer shield from motor cable shields and separate the encoder cable
as far possible from motor cables.
4.2 Sensor mounted to a surface that is grounded through bearings or a poorly-grounded surface, or
mounted to a non-conducting surface
9 - pin D-sub connector grounding: The encoder's connector shell must be in contact with the customer-supplied
mating connector, which must be connected to the controller's ground. If a customer-supplied shielded cable
connects the encoder to the controller, then the outer shield on the customer-supplied cable must be connected
to the controller's ground. The controller must be grounded to earth at the point of installation.
The encoder sensor must be mounted so that it is electrically isolated from ground.
5 Volts
0 Volts
Power
Supply
5 Volts
0 Volts
POWER
SUPPLY