Table 1: VMA18 Series Controller Feature Callout Numbers and Descriptions
Physical Features: Description and References
Callout
24 VAC, Class 2 Supply Power Spade Terminals (see
Supply Power Spade Terminals
)
1
Device Address DIP Switch Block (see
Setting the Device Address
)
2
Binary Outputs, 24 VAC Triacs (see
Table 4
)
3
Configurable Outputs: Voltage Analog Output (0–10 VDC) and Binary Output (24 VAC Triac) (see
Table 4
)
4
Dual Port Fitting (see
Figure 3
)
Not included in the VMA1826 model.
5
Manual Override Switch (see
Mounting
)
6
Controller Coupler (see
Mounting
)
7
Coupler Bolt (see
Mounting
)
8
Universal Input: Voltage Analog Input (0–10 VDC)
Resistive Analog Inputs (0–600k ohm) (see
Table 4
):
0–2k Potentiometer
RTD: 1k Nickel, 1k Platinum, or A99B SI
NTC: 10K Type L (10K JCI Type II is equivalent to Type L) or 2.252K Type II
Dry Contact Binary Input
9
N2/FC Bus Pluggable Screw Terminal Block (see
N2/FC Bus Terminal Block
)
10
EOL (End-of-Line) Switch (see
Setting the EOL Switch
)
11
SA Bus Spade Terminals (see
SA Bus Spade Lugs
)
12
TSTAT Modular Port: RJ-45 8-Pin Modular Jack (see
Modular Port
)
13
Captive Spacer and Screw (see
Figure 3
)
14
LED Status Indicators (see
Table 8
)
15
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 N2
Bus, refer to the
N2 Communications Bus Technical
Bulletin (LIT-636018)
.
VMA Terminals and Bus Ports
See
Figure 3
for input and output terminal and bus port
locations on the VMA18 Series controllers. Observe the
following guidelines when wiring a VMA18 controller.
5
VMA1826/1832 VAV Controller Installation Instructions
