MicroE Mercury II 5000 User Manual

Page 25

Appendix

IM-Mercury_II_5000_Series Rev. 1

Page 24

Mercury II 5000 Series Encoders
Installation Manual and Reference Guide

Recommended Interface Termination

Customer Differential Line Receiver

– RS 422: The following diagram shows the recommended

signal termination for a-quad-b, serial, index, and limits signals for the Mercury II 5000 Series
Encoders. Standard RS-422 Line Receiver Circuitry:

Grounding Considerations

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.

Note: For best performance, isolate the encoder outer shield from motor cable shields and

separate the encoder cable as far possible from motor cables.

Sensor mounted with good electrical contact to a well-grounded surface (preferred)

The encoder's connector shell must be in close, electrically-conductive 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 ensure
good electrical contact with the sensor.

5 Volts
O Volts

Outer Shield: Connector to sensor and
connector housing.

Mercury II
5800Si/Pa
Encoder

Cable Z

= 120

Ω

120Ω

Consumer
Electronics