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MS-VMA1620-1

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Refurbished

$320

1 In Stock

✓  2 Year PDF Supply Warranty

The MS-VMA1620-1 is a Variable Air Volume (VAV) controller sensor manufactured by Johnson Controls. It is an integrated, programmable device used in HVAC (Heating, Ventilation, and Air Conditioning) systems to control the air volume and temperature in different zones or spaces. The VAV controller operates on a nominal supply voltage rating of 24 VAC, with a voltage range of 20 VAC minimum to 30 VAC maximum. It consumes 10 VA of power during typical operation, and its maximum power consumption rating is 14 VA. This ensures efficient operation while minimizing energy usage. The MS-VMA1620-1 utilizes a DIP switch for controller addressing, allowing for easy configuration and integration into a BACnet MS/TP (Master-Slave/Token-Passing) communications bus system using the RS-485 protocol. This enables communication with other devices on the network, facilitating efficient data exchange and control. The analog input of the VAV controller has a resolution of 15 bits, ensuring accurate measurement and monitoring of input signals. The analog output has a resolution of 16 bits and offers +/-200 mV accuracy in 0-10 VDC applications, providing precise control over the output signals. The controller features one universal input, which can operate as a variety of input types, including 0-10 VDC, 0-600k ohm, or binary dry contact. It also has three binary outputs which are 24 VAC triac outputs that are powered internally, and two configurable outputs that can be set as either 0-10 VDC or 24 VAC triac BO, providing flexibility in controlling external devices. The MS-VMA1620-1 has dimensions of 182 x 182 x 64 mm and weighs approximately 0.86 kg (1.9 lb). It can be easily mounted to a damper shaft using a single set screw or to a duct with a single mounting screw, allowing for straightforward installation.

Technical Specifications for MS-VMA1620-1

Type:Variable Air Volume Controller
Supply voltage:24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz
Power Consumption:10 VA typical, 14 VA maximum
Controller Addressing:DIP switch set; valid controller device addresses 4–127
Communications Bus:BACnet MS/TP, RS-485:
Analog Input Resolution:15-bit resolution
Analog Output Resolution and accuracy:16-bit resolution and ±200 mV in 0–10 VDC applications
Input Capabilities:One Universal Input: Defined as 0–10 VDC, 0–600k ohm, or Binary Dry Contact
Output Capabilities:Three Binary Outputs: Defined as 24 VAC Triac (internal power source) and Two Configurable Outputs: Defined as 0–10 VDC or 24 VA
Mounting:Mounts to damper shaft using a single set screw and to duct with single mounting screw.
Dimensions (Height x Width x Depth) :182 x 182 x 64 mm (7-3/16 x 7-3/16 x 2-1/2 in.)
Weight:0.86 kg (1.9 lb)

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