Verasys Equipment and Application Controllers (VEC and
VAC)
The Verasys Equipment and Application controllers are part of the SMART Equipment controller
family. The VECs run pre-engineered applications that reside on the zone bus of a zone coordinator,
and provide the inputs and outputs required to monitor and control HVAC equipment.
The Application controllers run pre-engineered applications that reside on the system bus of an
SBH, and provide the inputs and outputs required to monitor and control various applications.
The Equipment and Application controllers include an integral real-time clock to monitor and
control schedules, calendar trends, and to operate for extended periods of time as stand-alone
controllers when they are offline from the system network.
Verasys Equipment Controller (VEC100)
The VEC100 controls either VAV or changeover bypass (COBP) units. You can use this single
controller to control units that are not a Smart Equipment units. The VEC100 ships with an
application that supports up to two stages of heating and four stages of cooling. Additional
applications are available to control modulated heating, modulated cooling, and a heat pump.
You can configure all of the controller applications for use in a VAV or COBP system and to control
an economizer. The controller automatically uses analog sensors when you connect them. If you
connect a return air sensor to the controller and the system is a VAV system, the warm-up feature
is integrated for control. If a CO
2
sensor is connected and an economizer is installed, demand
ventilation control sequences are available. For more information about the sequences that this
controller uses, refer to the application note of the relevant application and the
Verasys System
Operation Overview Technical Bulletin (LIT-12012370)
.
Verasys Lighting controller (VAC1001)
The Verasys Lighting controller (VAC1001) is a Verasys Application controller that controls up to
nine lighting contactors that are grouped in zones. You can control and schedule up to eight zones
from a light level sensor. You can connect either a binary or analog light level sensor and drive
the zone control based on light level. The zone also includes an associated schedule that can drive
the output of the zone. You can drive contactors for outside lights because of the flexibility of the
controller; lights come on when it is dark and turn off at a fixed time or drive other zones based on
the schedule. The first seven zones have a binary input that can override the zone output. You can
set the binary input to momentary and allow a set amount of time for the override, or maintain the
input for a more permanent override.
Input/Output Module
The Input/Output Module is a Verasys Application controller (VAC1002). The VAC1002 is a simple
point multiplexer that monitors up to five analog inputs and four binary inputs. The controller
controls up to nine binary outputs, connects to up to five wired or wireless NS sensors, and up to
four Johnson Controls’ energy meters. The VAC1002 uses the SBH to monitor and control auxiliary
points in a facility.
You can configure analog, binary, and NS sensor inputs for trending and alarming. The analog
trend samples are set to 200. The binary trend samples are set to 20, but you can adjust the trend
interval. You can configure each input for alarming. For binary inputs, you can define which state
triggers the alarm. For analog inputs, you can set high and low alarm limits. The alarm message is
adjustable for binary and analog types.
You can connect Smart Edge devices to the VAC1002. The energy meter is compatible with the
controller and the meter monitors the voltage, amperage, demand, and consumption for each
phase of incoming power. The energy meter and all inputs are available to use with the interlock
11
Verasys System Product Bulletin
