Electrical Characteristics - Fagor SA Manual De Instrucciones

1 Vpp incremental signals
90º
V
A
V
B
20  m
Clock sequence
T
t
1
1 2 3
MSB
To func tion c orrec tly the c onfiguration of the S S I protoc ol in the linear enc oder m us t m atc h the c onfiguration of the S S I
protoc ol in the unit the linear enc oder is c onnec ted to (se e th e d e scrip tio n o f th e p a ra m e te rs o n p a g e 10 o f th is
m a n u a l). The F agor S A linear enc oders are m anufac tured w ith the following default values .
Num ber of B its 32
Counting R es olution 0.1µm
Data Ty pe B inary
P arity N O
Tim e O ut 450µs
Norm ally it is pos s ible to m atc h thes e values by adjus ting them in the unit the linear enc oder is c onnec ted to. However, if
this is not pos s ible, the values c an be c hanged in the linear enc oder. This c an be done us ing the F agor P D -U -E NC
adapter to c onnec t
F or further details pleas e c ons ult y ou F agor offic e.

ELECTRICAL CHARACTERISTICS

1V
pp
1V
pp
Absolute signals
t
2
n-1
n
LSB
C o n fig u ra tio n o f th e S S I p ro to co l
De fa u lt va lu e s fo r S S I p ro to co l in F a g o r lin e a r e n co d e rs (sca le s)
Signals
V
V
DC offset
Signal period
Phase Shift A & B
V
A
Freq@120m/min
Power supply V
Power supply Imax
Max cable length
Transmission
Levels
Clock frequency
Max bits (n)
t
t
SSI
Parity
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Specification
1 V +20 %, -40 %
A
pp
1V +20%, -40%
B
pp
/
V 0.8 V to 1.25 V
B
250 mA (no load) (sense possible)
75 meters. For lengths over 9 meters, a 1 m or 3 m
cable and an extension cable must be used whose
characteristics are:
(4x2x0.14+4x0.5+(4x0.14)) mm
Specification
SSI synchronous serial data transfer via RS-485
100kHz - 500kHz
32 (configurable)
T
1
20 s to 35 s
2
Gray or binary (configurable)
Fully configurable
A, B, /A & /B
2.5 V  0.5 V
20 m
90 º 10 %
100 kHz
5 V  10 %,
2
EIA RS-485
1 s to 10 s
> 1 s