Gv224_01a_oi_e.docx / Okt-22
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3.
Introduction and Block Diagram
GV224 and GV228 as well as GT222, GT224 and GT228 represent a series of incremental
encoder splitters with a most compact, space-saving design and with most versatile technical
features. All models are fully identical except for the number of output channels and any
potential separation between input and output.
Models GT222, GT224 and GT228 have a potential separation between input and output circuit
as well as between the output circuits among each other. There is no galvanic separation
between input and device supply. This feature, in general, can be most advantageous with
impulse distribution among expanded production lines with adverse conditions of
EMC / grounding / potential shift.
The encoder input is switch-selectable for operation with either standard RS422 signals, with
differential TTL or HTL signals or with single-ended HTL encoder signals. All encoder outputs
provide push-pull drivers. The output level can be individually specified accordingly about an
external voltage.
The adjoining block diagrams clearly explain the principle of operation and the potential
conditions between all circuits. For simplification the illustrations show only two of the outputs,
since all other outputs are fully identical.
All units of this series provide an extended range of ambient temperatures for use under
difficult environmental conditions (see chapter
“Technical Specifications”).
