Wiring
Risk of Electric Shock.
Disconnect the power supply
before making electrical connections to avoid electric
shock.
Mise En Garde: Risque de décharge électrique:
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
Important:
Do not connect supply power to the
controller before finishing wiring and
checking all wiring connections. Short
circuits or improperly connected wires can
result in damage to the controller and void
any warranty.
Important:
Do not exceed the controller electrical
ratings. Exceeding controller electrical
ratings can result in permanent damage to
the controller and void any warranty.
Important:
Use copper conductors only. Make all wiring
in accordance with local, national, and
regional regulations.
Important:
Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
For detailed information on configuring and wiring an
MS/TP Bus, Field Controller (FC) bus, or Sensor/Actuator
(SA) bus, refer to the
MS/TP Communications Bus
Technical Bulletin (LIT-12011034)
.
VMA Terminals and Bus Ports
See
Figure 2
for input and output terminal and bus port
locations on the VMA controller. Observe the following
guidelines when wiring a VMA controller.
Input and Output Terminals
The input spade terminals are located on the side of the
VMA near the device address switch. The output spade
terminals are located on the opposite side of the controller
near the power supply terminal block. See
Table 1
for
more information.
FC Bus Terminal Block
The FC Bus terminal block is a blue, removable,
4-terminal plug that fits into a board-mounted jack.
Wire the removable FC Bus terminal block plugs on the
VMA and other field controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in
Figure 3
. See
Table 4
for more information.
Note:
The Shield terminal (SHLD) on the FC Bus
terminal block is isolated and can be used to
connect the cable shields on the bus (
Figure 3
).
Figure 3: FC Bus Terminal Block Wiring
SA Bus Terminal Block
The SA Bus terminal block is a brown, removable,
4-terminal plug that fits into a board-mounted jack.
Wire the removable SA Bus terminal block plugs on the
VMA and other SA Bus devices in a daisy-chain
configuration using 4-wire twisted, shielded cable as
shown in
Figure 4
. See
Table 4
for more information.
5
VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
