LINEPULS & LINECOD catalogue 2016 in English

LINEPULS
Output circuits
Incremental output circuits
Several output circuit types are available to incremental encoders. As most control units only
use digital signals (square wave signals), therefore the sinusoidal signals have often to be
digitized before being issued to output.
The choice of the output circuit depends on some considerations, for instance the type of
input the controller is expecting and the required cable length.
Push-Pull electronics bases on a 7272 circuit and provides square-waves signals phaseshifted
by 90 electrical degrees. It is a general-purpose circuit capable of either sourcing
or sinking current up to 80 mA (peak) per output and suitable for most motion control
equipment. When the output is in logic state high, current will source to the downstream
electronic equipment. When the output is in logic state low, current will sink from the load.
Push-Pull output can optionally provide also inverted signals (code YC, see “Inverted signals
complementary or differential outputs” on page 24). Customarily encoders with Push-Pull
output circuit are operated at 10 to 30Vdc (typically 12Vdc or 24Vdc).
Push-Pull / HTL (codes Y and YC)
Advantages: high compatibility, suitable for interface connections even with NPN or PNP
inputs circuits, inverted signals allow use with longer cables.
Disadvantages: medium interference immunity, needs external filters for noise reduction.
Power supply
(Vin)
Max.
output
current
Peak
output
current
Typical
rising/falling
edge time
Vout low
@40mA
Vout high
@40mA
+10 +30 Vdc 40 mA 80 mA 550 ns / 470 ns ≤ 0.5 Vdc (Vin–1.25) Vdc
Thermal
protection
Short-circuit
protection
Inverted signals
• - YC order code only
Max. cable length
30 m / 100 ft (AB0)
180 m / 590 ft (AB0, /AB0)
Recommended input circuit (Y order code)
Recommended input circuit (YC order code)
30