MicroE OPS Series - Manual (Page 21)

Jacket
Aluminum
Polyester
Shied
Braided
Shield
Page 21
Appendix C
Interface Cable Requirements
OPS Series
Signal Twisted Pair
A+ Pair 1
A-
B+
Pair 2
B-
Index+
Pair 3
Index-
+5V
Pair 4
GND
Left Limit
Pair 5
Right Limit
1. Customer Interface Cable Requirements
Customer cables that interface to OPS ™ series encoders must have the following characteristics:
• Twisted pair signal wiring.
• Characteristic impedance of 100-120 ohms.
• Sufficient wire gauge to meet the minimum voltage requirement at the encoder, for example 24AWG
gauge wire for a 2m length cable. Examples of acceptable cables with 24AWG gauge wire and 4
twisted pairs are Belden 9831, 8104, and 9844 or other manufacturer’s equivalents.
• Single shield cable with a minimum of 90% coverage. Note that a double shielded cable may be
required in high-noise applications.
2. Signal Wiring
Each differential signal should be connected to a corresponding twisted pair as follows:
Fold braided shield back over jacket. Example shows double-shielded cable.
Dimensions shown are for illustration only.
3. Shield Termination:
The customer's cable shield should be in 360° contact with the connector shroud and the connector shell to
provide complete shielding. The connector shell should be metal with conductive surfaces. Suggested metal
connector shells for use with OPS ™ encoders: AMP 748676-1 or equivalent. The shield should be terminated
as illustrated in the following diagram.