Technical Specifications
Table 10: VMA18 Series Controllers
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.
Product Code Numbers
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, Power Supply Class 2
(North America), Safety Extra-Low Voltage (SELV) (Europe)
Supply Voltage
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).
Power Consumption
Operating:
0 to 50°C (32 to 122°F)
Storage:
-40 to 70°C (-40 to 158°F)
Ambient Conditions
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
Terminations
N2 Open Protocol:
Valid field controller device addresses 1–254
BACnet MS/TP:
DIP switch set; valid field controller device addresses 4–127 (Device addresses
0–3 and 128–255 are reserved and not valid field controller addresses.)
Controller Addressing
RS-485: selectable between BACnet MS/TP or N2
FC Bus: 1.5 mm (18 AWG) standard 3-wire, twisted, shielded cable recommended between
the supervisory controller and field controllers
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
1
Communications Bus
1
Analog Input:
15-bit resolution on UIs
Analog Output:
0–10 VDC ± 200 mV
Analog Input/Analog Output
Accuracy
Range: -1.5 in. to 1.5 in. W.C.
Performance Characteristics:
Accuracy: ±0.75% Full Span Maximum
2
(±0.0225 in. W.C.)
Typical accuracy at zero (null) pressure is ±0.003 in. W.C.
Air Pressure Differential
Sensor (VMA1832 Only)
4 N·m (35 lb·in) minimum shaft length = 44 mm (1-3/4 in.)
Actuator Rating
Mounts to damper shaft using single set screw and to duct with single mounting screw
Mounting
165 x 125 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.)
Dimensions
(Height x Width x Depth)
0.65 kg (1.45 lb)
Weight
25
VMA1826/1832 VAV Controller Installation Instructions
