MicroE Mercury II 5000 - Manual (Page 26)

Appendix
IM-Mercury_II_5000_Series Rev. 1 Page 25 ©2014 MicroE Systems
Mercury II 5000 Series Encoders
Installation Manual and Reference Guide
Sensor mounted to poorly-grounded or non-conducting surface
6.4 Customer Interface
Cable Requirements
Customer cables that interface to Mercury II series encoders must have the following
characteristics:

Twisted pair signals 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. Recommended cables are 24AWG
gauge wire with 6 twisted pairs.

Single shield cable with a minimum of 90% coverage. Note that a double shielded cable
may be required in high-noise applications.
Signal Wiring for A-quad-B
Each differential signal should be connected to a corresponding twisted pair as follows for the 15-
pin standard male D-sub connector:
Note: The Alarm signal on pin 15 is not differential and is not part of a pair.
Mercury II 5000
Signal Twisted Pair Pin
A+
Pair 1
14
A- 6
B+
Pair 2
13
B- 5
Index+
Pair 3
12
Index- 4
Left Limit+
Pair 4
10
Left Limit- 11
Right Limit+
Pair 5
1
Right Limit- 3
+5V
Pair 6
7, 8
GND 2, 9
5 Volts
O Volts