Johnson Controls VMA1617 Installation Manual

Applications
The VMA1617 and VMA1632 programmable digital
controllers are designed for Variable Air Volume
(VAV) applications that communicate through the
BACnet MS/TP or N2 protocol. These Variable
®
Air Volume Modular Assembly (VMA) controllers
feature combinations of an integral digital pressure
sensor (DPT), a damper actuator, and a 32-bit
microprocessor. The controllers' small package size
facilitates quick field installation and efficient use
of space without compromising high-tech control
performance. These VMA controllers connect easily
to the non-communicating sensor for zone air
temperature sensing.
Switchable communications
protocols
By default, Metasys system controllers and
®
network sensors communicate using the standard
BACnet protocol, based on the ANSI/ASHRAE
135-2004.
The BACnet protocol is a standard for ANSI,
®
ASHRAE, and the International Standards
Organization (ISO) for building controls.
VMA16 controllers are BTL-tested and listed as
BACnet Application Specific Controllers (B-ASCs).
Release 10.1 and higher of Controller Configuration
Tool (CCT) can be used to switch the Field Bus
communications protocol in this controllers
to be either the standard BACnet MS/TP or
the N2 protocol. BACnet MS/TP is the default
communications protocol for all new controllers.
Switchable communications protocols provide a
cost-effective upgrade and modernization path
for customers with existing N2 controllers. The
Modernization Guide for Legacy N2 Controllers
(LIT-12012005) and the controller-specific
documentation provide installation and
commissioning support and include tips for
efficient and safe replacement. Refer to the N2
Compatibility Options chapter of the Controller
Tool Help (LIT-12011147) for information about
mapping N2 Objects in controllers with switchable
communications protocols.
The N2-capable controllers can be used as functional
replacements for legacy N2 controllers. The N2-
VMA1617 and VMA1632 VAV Controllers
capable controllers have the following features and
benefits:
• Have the I/O quantities and characteristics of
Metasys family controllers
• Must be programmed with CCT, which has similar,
but not identical programming capabilities as
HVACPro, GX9100, GPL, and other legacy tools
• Support SA Bus devices
• Support WRZ wireless sensors from the controller
using the WRZ-7860 receiver
• Are available in Buy American versions (most
models)
The N2-capable controllers do not support the
following features:
• Zone Bus (for example, TMZ sensors and M100
actuators) or XT-Bus (System 91) devices (for
example, XT, XTM, and XP modules)
• Wireless connection to the N2 bus
• NxE passthrough
North American emissions
compliance
United States
This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when this equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area
may cause harmful interference, in which case the
users will be required to correct the interference at
their own expense.
Installation Guide
Part No. 24-10143-349 Rev. E
2019-10-18
*2410143349E*
(barcode for factory use only)
MS-VMA1617, MS-VMA1632