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Model PD6300 Pulse Input Rate/Totalizer Instruction Manual

Modbus RTU Serial Communications

Serial communications connection is made to an RJ45 connector labeled

M-LINK on Figure 6. Use the PDA1232 for RS-232 interfacing or the

PDA1485 for RS-422/485 interfacing. The same port is used for interfac-

ing with all expansion modules (e.g. external relays, digital I/O).

Use the PDA1200 meter copy cable for meter-to-meter interfacing for

cloning purposes (i.e. copying settings from one meter to other meters).

Relay Connections

Relay connections are made to two six-terminal connectors labeled

RELAY1 – RELAY4 on Figure 6. Each relay’s C terminal is common only

to the normally open (NO) and normally closed (NC) contacts of the cor-

responding relay. The relays’ C terminals should not be confused with

the COM (common) terminal of the INPUT SIGNAL connector.

CNONO NC NC C

RELAY4 RELAY3

4365 21

CNONO NC NC C

RELAY2 RELAY1

4365 21

Figure 11: Relay Connections

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Precision-digital PD6300 Manuale Utente Pagina 24