57 / 102
57
Zone Controllers
TAC Xenta 121-FC
Programmable Fan Coil Controller
TAC Xenta 121-FC is an easily programmable controller intended for both
2-pipe and 4-pipe applications, with or without re-heat. It can be configured
for use with a multitude of valve actuator types, such as on/off, multistage,
increase/decrease, PWM, etc. The controller has different types of fan control
and advanced fan control functions, including on/off delays, boosting and
conditioning.
The sequences for cooling, heating and fan are completely user program-
mable, allowing for numerous different applications. For energy savings the
controller has built-in economizer functionality. Use TAC Xenta 121-FC with
any TAC STR room unit.
Set-up is done using the programming tool TAC ZBuilder, which can be run
stand-alone or as a device plug-in to either TAC Vista or LNS. The configura-
tion settings are downloaded into a TAC Xenta 120, prepared with the neces-
sary basic application software.
The controller is a L
ON
M
ARK
®
compliant device aimed at communicating on a
LonTalk
®
TP/FT-10 channel. It is able to operate both as a stand-alone device
and as part of a system. Input and output network variables can be monitored
via the TAC Xenta OP, but programming relies on the use of the TAC ZBuilder.
FUNCTIONAL FEATURES
•
The controller is designed for
both 2 and 4 pipe installations
•
Multi-functional Heating and
Cooling: heating, cooling and
secondary heating
•
Multi-stage Fan Control:
up to three stages or analog
speed control
•
Indoor Air Quality Control:
full support for CO
2
and RH
(Relative Humidity) functions
•
Exception modes take care of
abnormal conditions like fire
or risk of frost
•
Configurable In- and Outputs:
all inputs and outputs are con-
figurable to minimize installa-
tion cost
SPECIFICATIONS
Operating voltage
FC/24 . . . . . . . . . . . . . . . . . . . 24 V AC ±20%, 50–60 Hz
FC/230 . . . . . . . . . . . . . . . . . . 230 V AC ±10%, 50–60 Hz
Power consumption . . . . . . . . . 5 VA
Dimensions . . . . . . . . . . . . . . . 126 x 122 x 50mm (5” x 4.8” x 2”)
Ambient temperature
Operation . . . . . . . . . . . . . . . . 0°C to +50°C (32°F to 122°F)
Storage . . . . . . . . . . . . . . . . . . –20°C to +50°C (–4°F to 122°F)
Humidity . . . . . . . . . . . . . . . . . max. 90% RH non-condensing
Enclosure rating . . . . . . . . . . . . IP 30
Digital inputs . . . . . . . . . . . . . . 3, (X1-X3) NO/NC
Thermistor inputs. . . . . . . . . . . 2, (B1-B2) NTC 1.8 kohm at 25°C (77°F)
Universal input. . . . . . . . . . . . . 1, (U1), configurable as thermistor, digital
or analog input
Potentiometer input. . . . . . . . . 1, (R1) 10 kohm
Triac outputs . . . . . . . . . . . . . . 4, (V1-V4) 24 V AC Intern. supplied
Relay outputs. . . . . . . . . . . . . . 3, (K1-K3) 250 V AC, 3A
Relay output . . . . . . . . . . . . . . 1 (K4) FC24 24 V AC, FC230 250VAC, 3A
Voltage output. . . . . . . . . . . . . 1 (Y1) 0-10 V DC
DESCRIPTION
0-073-0621-0 Contr Zone TAC Xenta 121-FC/24
0-073-0622-0 Contr Zone TAC Xenta 121-FC/230
0-073-0914-0 LNS Plug-in