Modbus Rtu Serial Communications; Relay Connections; Figure 11. Voltage Input Connections; Figure 12. Relay Connections - Bindicator PRD1000 Instruction Manual

PRD1000 Analog Input Process Meter
The meter is capable of accepting any voltage from -10 VDC to +10 VDC.

Modbus RTU Serial Communications

Serial communications connection is made to an RJ45 connector
labeled M-LINK on Figure 7. For interfacing to the PRD1000, use a
RS-485 serial adapter.

Relay Connections

Relay connections are made to two six-terminal connectors labeled
RELAY1 – RELAY2 on Figure 7. Each relay's C terminal is common
only to the normally open (NO) and normally closed (NC) contacts of the
corresponding relay. The relays' C terminals should not be confused
with the COM (common) terminal of the INPUT SIGNAL connector.

Figure 11. Voltage Input Connections

RELAY2
6 5
NO NC

Figure 12. Relay Connections

RELAY1
4 3 2 1
C NO NC C
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Instruction Manual