User's Guide

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User Guide
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TFF-2220-00AA and TFF-2221-00AA User’s Guide D1436 Rev B
©2008 Zebra Enterprise Solutions. WhereCall IV and all product names and numbers are Zebra Enterprise Solutions trademarks. All other trademarks are the property of their respective owners.
WhereTag IV PLC Interface Cable Electrical Block Diagram
The cable should be connected and routed to prevent large voltage spikes and static
discharges from being carried into the tag via the switch cable. This may result in false
“Button Calls” being generated or in extreme cases the TFF-2221 could be damaged.
Figure 13: WhereCall IV PLC Electrical Interface
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CAUTION
Turck RS 4.41T-X
(Connect to WhereCall IV PLC)
The momentary switch will initiate blinks
when it is closed for 100 milliseconds and
then released. The switch must not
remain closed for more than 3.0 seconds
to avoid switching to power off mode.