The controller of simplified configuration is used for data collection from gas meters and computers with the digital RS-232\ RS-485 interface in the “transparent channel” mode.
The controller has the following interfaces:
Depending on the involved interfaces, the controller can operate as an interface converter or an external GSM-modem:
Interfaces | Operating mode |
RS 232 – RS 485 | RS 232 – RS 485 interface converter |
RS 232 – USB | RS 232 – USB interface converter |
RS 485 – USB | RS 485 – USB interface converter |
RS 232 – Modem | external modem with RS 232 interface |
RS 485 – Modem | external modem with RS 485 interface |
USB – Modem | external modem with USB interface |
Depending of configuration, the controller can be equipped with a spark protection barrier and an external antenna:
Description | Spark protection barrier |
GSM antenna |
KDT-421 ai | no | integrated |
KDT-421 ao | no | external |
KDT-321 ai | yes | integrated |
KDT-321 ao | yes | external |
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