Fagor DDS, Hardware Manual

Page: 133 / 386

   Drive modules
DRIVE MODULES
Mo
dula
r d
riv
es
3.
133
DDS
HARDWARE
Ref.1310
F. H3/68
Characteristics of the square TTL signals and 1 Vpp sinusoidal signals.
F. H3/69
Characteristics of the SSI signals.
90° PHASE-SHIFT
V
A
V
B
V
OH
> 2.5 V
V
OL
< 0.5 V
t
90° PHASE-SHIFT
t
V
A
= V
B
: 0.6 Vpp - 1.2 Vpp
V
A
V
B
Centering < 6.5%
V
A
/ V
B
ratio: 0.8 Vpp - 1.25 Vpp
1Vpp
20 µm
N=32 bits; T= 1µs to 10 µs; t1 > 1µs; t2= 20 µs to 35 µs
Logic levels, according to EIA-485
RS-485