THOMSON Omnidrive Series Installation Manual page 70

The input circuits shown in the following diagrams support connections to differential TTL line drivers,
single-ended TTL line drivers and open collector devices. These inputs are selectable under software
control.
Quadrature Interface Specifications
T 6.19
ABLE
Specification
ON State Voltage
(Volts)
OFF State Voltage
(Volts)
Common Mode
Voltage (Volts)
Current Draw
(mA)
A or B Signal
Frequency (MHz)
Index Pulse Width
(nsec)
Installation Manual for Models ODM-005, ODM-005i, ODM-010, ODM-010i, ODM-020 and ODM-020i
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Description
Voltage difference between the + and – inputs that
indicate an ON state.
Voltage difference between the + and –inputs that
indicates an OFF state.
Voltage difference between an encoder signal
input and the reference ground of the drive.
Current draw into the + input or – input
Frequency of the A or B line inputs. Count fre-
quency is 4 times this frequency, since the cir-
cuitry counts each of the four transitions in a single
line.
Pulse width of the index signal. The index signal is
active for a percentage of the revolution, therefore
the speed of the encoder dictates the pulse width.
Interfaces 6-19
Minimum Maximum
1.0 +15
-1.0 -15
-15 +15
-5 +5
1
500