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Discrete Output:
Form A Relay
DC Load
BO/DO outputs 1-6 are Form
A dry contact relays, also
rated for 5A @ 30VDC
(resistive). Snubbers should
be used with inductive loads.
Rating for inductive load is
2A @ 30VDC.
13.3 Connection of Power and Communications
Power and communications should be connected as indicated below.
I/O Point Type
Wiring Guide
Additional Information
Power
Connect AC or +DC power to
Power terminal. Connect
common or -DC power to
GND terminal. GND is common
to all terminals labeled COM.
Nominal power consumption is
6 watts, or 0.25A @ 24VDC,
with all relays on and all
analog outputs at 20mA.
Communications
Connect MS/TP RS-485 network
to NET+/- terminals.
Communication signals comply
with EIA-485 standard.
Line
Conditioning
VP4-2330 Line Conditioning:
VP4-0630 Line Conditioning:
The ValuPoint is shipped with
network line bias and
termination disabled. If
the ValuPoint will be the last
device at the end of the
RS-485 link, then termination
should be enabled. Often it is
also necessary to have line
bias enabled, but this must
only be done at one point on
the network (not both ends
like termination).
The bias and termination
jumpers are located in the
area of the circuit board
highlighted. The bias and
termination are enabled when
the shunts are aligned with
the white bars next to the
header pins. Move the shunts
to the opposite end to disable.
It is not necessary to enable
13. Physical I/O Connections
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