Wiring, Shield Connections - Emerson SI-Universal User Manual

Table 5-6 P2 Interface and simulated encoder output connection details
Terminal
15 way D-type
connector
7
8
9
10
11
12
When the EnDat, SSI or BiSS* type position feedback device is selected for use on the P1 interface
and the encoder has no freeze inputs, it is possible to use P1 and P2 position interface and the
encoder simulation output together, the P2 position interface uses alternative connections on the
15-way D-type connector. Pr 2x.072 shows the status of the P2 position interface and indicates if
alternative connections are being used for the P2 position interface.
Table 5-7 P2 Interface and simulated encoder output connection details when P1 interface
is EnDat, SSI or BiSS* with no freeze inputs.
Terminal
15 way D-
type connector
5
6
7
8
9
10
11
12
* BiSS is not currently supported.
5.2

Wiring, Shield connections

Shielding considerations are important for PWM drive installations, due to the high voltages and
currents present in the output circuit with a wide frequency spectrum, typically from 0 to 20 MHz.
Encoder inputs are liable to be disturbed if careful attention is not given to the physical managment
of the cable shields.
Encoder mounting methods
There are three methods for mounting an encoder on the motor:
1. Galvanic isolation between encoder and motor
2. Galvanic isolation between encoder circuit and encoder body
3. No Isolation
5.2.1 Encoder with galvanic isolation from motor
When galvanically isolated the encoder device is mounted to the motor with isolation installed
between the motor housing / shaft and encoder as shown in Figure 5-1.
28
10 way
pluggable
AB
connector
3 A
4 A\
5 B
6 B\
8
9
P2 Interface
10 way
pluggable
connector
3
4
5
6
8
9
P2 Interface
EnDat
SSI
FD FR
BiSS
F F DATA
F\ F\ DATA\
D R CLK
D\ R\ CLK\
Z Freeze2
Freeze2
Z\
\
EnDat Alt
SSI Alt
AB
BiSS Alt
DATA
DATA\
Asim
Asim\
Bsim
Bsim\
CLK
CLK\
Encoder Simulation Output
AB FD FR
Asim Fsim Fsim
Asim\ Fsim\ Fsim\
Bsim Dsim Rsim
Bsim\ Dsim\ Rsim\
Zsim
Zsim\
Encoder Simulation Output
FD FR
Fsim Fsim
Fsim\ Fsim\
Dsim Rsim
Dsim\ Rsim\
SI-Universal Encoder User Guide
SSI
DATAsim
DATAsim\
CLKsim
CLKsim\
SSI
DATAsim
DATAsim\
CLKsim
CLKsim\
Issue: 2