Gv224_01a_oi_e.docx / Okt-22
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4.4.
Impuls Outputs
All outputs provide the non-inverted and the inverted signals at any time, even when on the
input side the inverted signals are not available.
The potential situation between the outputs and other circuits is clearly explained by the block
diagrams in chapter 3.
An external voltage must be supplied to the respective output terminals (terminal ext. COM+) of
the outputs, which determines the level of the output signal *). The permitted output range is
from 5 to 30 volts and the signal levels will be approx. 0.7 volts less than the remote voltage
applied. All output lines are permanently short-circuit proof and the maximum output current is
30 mA per line.
The terminal assignment can be found in the block diagram and is also printed on the
connection sticker. All output terminal strips have the same codification, since it is fully
unimportant to which of the outputs a terminal strip is connected (only the external voltage
applied to the (ext. Com+) input of the mating connector is responsible for the output level).
*) For the types with potential separation (GT22x), in addition to "ext. COM+" and also
the corresponding "ext. GND" connection of the corresponding output must also be
connected. For the types without potential separation (GV22x) all "ext. GND's" of the
outputs are internally connected with the device supply - "GND".
4.5.
Error Evaluation
With DIL switch 3 = ON the yellow error LED can be activated for differential input signals
(RS422 or HTL differential). This lights up as soon as one (or more) of the channels A, B and Z
detects an error between the lines (e.g. wire break). For this error detection, the individual
channels must be locked accordingly. (e.g. by means of 120 Ohm resistors)
If a channel (e.g. Z and /Z) is not used and consequently not connected and
the error evaluation has been activated by DIL 3, then depending on the
signal level set (TTL or HTL) the non-connected channel must be connected
accordingly to this signal level (5V for TTL or 24V for HTL) and the associated
non-connected inverted channel must be connected accordingly to GND.
Otherwise the error detection would always be triggered incorrectly due to
the non-connected channel.
