NOVUS V1.5x A - Manual (Page 11)

NOVUS AUTOMATION www.fieldlogger.net 11/103
POWER SUPPLY
The terminals 25 and 26 indicate the main power supply of FieldLogger.
DIGITAL I/O
There are eight I/O that can be individually configured as inputs or outputs. There is a terminal for the positive signal of
each I/O, but the negative terminal of all of them is common (there is no isolation among the channels).
• Inputs:
When configured as inputs, they may be connected to voltage outputs (please check the acceptable levels in the
Specifications section), dry-contact outputs and NPN outputs. Care must be taken when connecting multiple outputs
because of the lack of isolation between the FieldLogger inputs.
Fig. 15 - Voltage connection Fig. 16 - Dry-contact connection Fig. 17 - NPN Connection
• Outputs:
When configured as outputs, they can activate limited power loads (please check the Specifications section).
Fig. 18 - Connection of a load R
L
to a digital output
RELAYS
FieldLogger has 2 relays that can be used in the activation of electrical loads (please check the Specifications section).
For each relay, we have the common terminal, NC (normally closed) terminal and the NO (normally open) terminal.
When deactivated, the relay common is in contact with the NC terminal. When activated, the common is in contact with
the NO terminal.
RS485
The RS485 Interface of the FieldLogger has terminals for the 3-wire communication, including the common. The
connection in a Modbus network will depend if the device is configured to operate as a master or a slave.