Electrical Characteristics - Fagor SVA Manual De Instrucciones

1 V p p incre m e n ta l sign a ls
90º
V
A
V
B
20  m
Abso lute signa ls
Cloc k s equ enc e
T
t
1
1 2 3
M SB
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 V A linear enc oders are m anufac tured with the follow ing 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
p p
1V
pp
n- 1
n
LS B
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)
Page 8/16 - "SVA" - V1209
S ignals
V
A pp
V
B
p p
D C offs et
S ignal period
P has e S hift A & B
/
V V
A
Freq@ 120m /m in
P ow er s upply V
P ower s upply Im ax
M ax c able length
Trans m is s ion
Levels
t
2
Cloc k frequenc y
M ax bits (n)
T
t
1
t
2
S S I
P arity
S pe cifica tio n
A , B , /A & /B
1V + 20% , -40%
1V + 20% , -40%
2.5V  0.5V
0.8V to 1.25V
B
5V  10% ,
250m A (no load) (s ens e pos s ible)
150 m eters . For lengths over 9 m eters , a 1m
c able and an ex tens ion c able m us t be us ed
whos e c harac teris tic s are:
(4x 2x 0.14+ 4x 0.5+ (4x 0.14)) m m 2
S pe cifica tio n
S S I s y nc hronous s erial data trans fer via RS 485
E IA RS 485
100k Hz - 500k Hz
32 (c onfigurable)
1  s to 10  s
20  s to 35  s
G rey or binary (c onfigurable)
Fully c onfigurable
20  m
90º  10%
100k Hz
> 1  s