VVT Zone Controller 3
Specifications
Driver drv_vvtopen
Maximum number of control
programs
1
Power 24 Vac ±10%, 50–60 Hz
14 VA power consumption (20 VA with BACview
BACnet port
attached)
26 Vdc (25 V min, 30 V max)
Single Class 2 source only, 100 VA or less
For communication with the controller network using MS/TP (9600 bps, 19.2
kbps, 38.4 kbps, or 76.8 kbps)
Rnet port
For SPT sensors and a BACview
6
• 1 SPT Plus or SPT Pro
in any of the following combinations, wired in
a daisy-chain configuration:
• 1–4 SPT Standards
• 1–4 SPT Standards, and 1 SPT Plus or SPT Pro
• Any of the above combinations, plus a BACview
6,
Local Access port
but no more than 6
devices total
For system start-up and troubleshooting using Field Assistant or BACview
6
Inputs
(115.2 kbps)
4 inputs for connecting the following types of sensors:
• An alternate space temperature sensor (#33ZCT55SPT)
• Supply air temperature sensor (#33ZCSENSAT)
• Duct air temperature sensor (#33ZCSENDAT)
• CO2 sensor (#33ZCSENCO2)
• Relative humidity sensor (#33ZCSENSRH-01 [indoor space] or
33ZCSENDRH-01 [duct])
• Remote occupancy sensor
Input resolution 10 bit A/D
Digital outputs 3 digital outputs, relay contact rated at 1 A max. @ 24 Vac/Vdc. Configured
normally open.
Analog output 1 analog output, 0–10 Vdc (5 mA max). The controlled device must have a
minimum of 2000 Ohms resistance measured from its input to ground and
must share the same ground as the controller.
Output resolution 8 bit D/A
Integral actuator Brushless DC motor, torque 35 inch-pounds (4 Nm), runtime 205 seconds for
90 degree travel during control, or 25 seconds in high-speed test and balance
mode
Battery 10-year Lithium CR2032 battery provides a minimum of 10,000 hours of data
retention during power outages
Protection Incoming power and network connections are protected by non-replaceable
internal solid-state polyswitches that reset themselves when the condition that
causes a fault returns to normal. The power, network, input, and output
connections are also protected against voltage transient and surge events.
BT485 connector You attach a BT485 (not included) to a controller at the beginning and end of
a network segment to add bias and to terminate a network segment.
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