VIEWSONIC EXES-2000 - Manual (Page 16)

6-7 PC unit connection
PG0, PG1-PG11 (parallel data output for pager control)
SERIAL OUTPUT (serial data output for pager control)
Outputs solely intended for TR-321 controllers.
Maximum contact capacity: 125 VA (125V AC or 30V DC 1A)
Data transmitting speed: 10 pps (To comply with ESPA standards)
Serial data output
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