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HVAC40…
- 9 -
V1.1
3.1
E
LECTRICAL CONNECTIONS
Models with active analog output
(HVAC4017… and HVAC40V17…)
Models with 2-wire current output
(HVAC40A17…)
Models with relay switch output (HVAC40R17…)
Models with digital RS485 output (HVAC40S17…)
In the RS485 connection, the instruments are connected in a sequence through a
shielded cable with twisted pair for signals and a third wire for the common. Line ter-
mination must be set at the two network ends.
The maximum number of devices that can be connected to the RS485 line (Bus) de-
pends on the load characteristics of the devices to be connected. The RS485 standard
requires that the total load does not exceed 32 unit loads. The load of an
HVAC40S17T… transmitter is equal to ¼ of unit load. If the total load is greater than
32 unit loads, divide the network into segments and add a signal repeater between a
Other sensors with
RS485 output
Termination
Termination
PLC, data logger or
RS485/USB or RS485/RS232
converter for PC
Содержание Delta OHM HVAC40 Series
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