HEIDENHAIN IK 220 - Handbuch (Seite 79)

Hardware
79
Latching measured values via external inputs
The IK 220 has two external inputs for latching and saving
measured values.
The inputs -L0 and -L1 are low-active; they are kept at high level
by a 1.47-k
Ω
internal pull-up resistor. They can be connected to
TTL components.
The simplest way to activate the inputs is to make a bridge
from the 0-volt connection (terminals 8, 9) to the input for
latching.
Latch outputs -Lout
The IK 220 supplies two output signals: -Lout 1 (to D-sub
connection X11) and -Lout 2 (to D-sub connection X21).
-Lout 1/2 are low-active.
-Lout 1 supplies a low-level pulse simultaneously with
synchronous latching of measured values (IK220LatchInt) or
with latching by timer.
To latch the measured values of different IKs at the same time
(IK220LatchExt), you must use -Lout 2 (see next page).