VMA1832 Technical Specifications
Table 10: VMA1832 Controllers
Product Code Numbers
MS-VMA1826-x, MS-VMA1826-xG:
32-bit, Integrated VAV Controller and Actuator, 3 UI, 3 BO, and 2 CO; 24 VAC; FC Bus, and SA
Bus; Includes cable adapters for use when replacing VMA14xx Series controllers. Recommended
replacement for VMA1440 controller (No DPT).
MS-VMA1832-x, MS-VMA1832-xG:
32-bit, Integrated VAV Controller/Actuator/DPT, 3 UI and 2 BO; 24 VAC; FC Bus, and SA Bus, includes
cable adapters for use when replacing VMA14xx Series controllers. Recommended replacement for
VMA1410, VMA1415, or VMA1420 controller.
Supply Voltage
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, Power Supply Class 2 (North
America), Safety Extra-Low Voltage (SELV) (Europe)
Power Consumption
10 VA typical, 14 VA maximum
Note:
The VA ratings do not include any power supplied to the peripheral devices connected
to Binary Outputs (BOs) or Configurable Outputs (COs), which can consume up to 12 VA for
each BO or CO for a possible total consumption of an additional 60 VA (maximum).
Ambient Conditions
Operating:
0°C to 50°C (32°F to 122°F)
Storage:
-40°C to 70°C (-40°F to 158°F)
Terminations
Inputs/Outputs, SA bus, and Supply Power: 6.3 mm (1/4 in.) Spade Lugs
N2/FC Bus Pluggable Screw Terminal Block
TSTAT Modular Port: RJ-45 8-Pin Modular Jack
Controller Addressing
N2 Open Protocol:
Valid field controller device addresses 1–254
BACnet MS/TP:
Valid field controller device addresses 4–127
(Device addresses 0–3 and 128–255 are reserved and not valid field controller addresses.)
Communications Bus
N2 Open Protocol:
N2/FC Bus: 1.5 mm (18 AWG) standard 3-wire, twisted, shielded cable recommended between the
supervisory controller and field controllers
BACnet MS/TP Protocol:
SA Bus: 0.6 mm (22 AWG) stranded, 4-wire (2-twisted pairs) shielded cable recommended from the
VMA controller for network sensors and other sensor/actuator devices; includes a terminal to source
15 VDC supply power from VMA to SA Bus devices
Note:
For more information, refer to the
N2 Communications Bus Technical Bulletin (LIT-636018)
.
Input and Output Capabilities
3 - Universal Inputs: Defined as 0–10 VDC, 4–20 mA, 0–600k ohm, or Binary Dry Contact
3 - Binary Outputs: Defined as 24 VAC Triac (internal power source)
2 - Configurable Outputs: Defined as 0–10 VDC or 24 VAC Triac BO
Analog Input/Analog Output
Accuracy
Analog Input:
15-bit resolution on UIs
Analog Output:
0–10 VDC ± 200 mV
Air Pressure Differential Sensor
Range: -1.5 in. to 1.5 in. W.C.
Performance Characteristics:
Accuracy: ±0.75% Full Span Maximum (±0.0225 in. W.C.)
Note:
Combined error due to calibration, accuracy, non-linearity, and temperature variation.
Typical accuracy at zero (null) pressure is ±0.003 in. W.C.
Actuator Rating
4 N·m (35 lb·in) minimum shaft length = 44 mm (1-3/4 in.)
Mounting
Mounts to damper shaft using single set screw and to duct with single mounting screw
Dimensions
(Height x Width x Depth)
165 mm x 125 mm x 73 mm (6.5 x 4.92 x 2.9 in.)
Center of Output Hub to Center of Captive Spacer:
135 mm (5-5/16 in.)
Weight
0.65 kg (1.45 lb)
VMA1826/1832 VAV Controller Installation Guide
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