Schneider Electric TAC Xenta 104-A Data Sheet

TAC Vista

TAC Xenta® 104-A

Roof Top Unit Controller

The TAC Xenta 104-A is a zone controller for roof top units, small AHU, and unit ventilator app lications that have heating, cooling,
and econo mizer functions. The con trol ler keeps a constant zone temperature through sequenced con trol of the heating, cooling and
OA/RA dampers.

By using a discharge air temperature sensor, the discharge and zone temperatures may be controlled in cas cade if the TAC Xenta
104-A configuration properties are set ac cor ding ly. Cascade control also allows mini mum and max i mum limiting of the discharge air
tem perature. The fan On/Off is controlled by a 24 VAC isolated relay con tact. The fan mode may be selected to operate conti nuous
during the occupied mode, or cycle with heating or cool ing demand from the zone.

The controller is a LonMark compliant device that com municates on a LonTalk TP/FT-10 network via a twis ted-pair, polarity insensi­tive cable. It is able to operate both as a stand-alone unit and as part of a network sys tem. All network variables can be monitored
and configu red via the network or by using the TAC Xenta OP (version 3.11 or higher).

A selection of wall modules with various options can be used with the TAC Xenta 104-A controller. The wall mo dules are from the
STR100 series.

TECHNICAL DATA

Supply voltage............ 24 V AC –10% +20%, 50–60 Hz

Power consumption:

Controller with TAC Xenta OP .................... 5 VA

Digital outputs ..................max. 4×19 VA = 76 VA

Total...................................max. 81 VA

Ambient Temperature

Storage ...............–25 °C to +50 °C (–13 °F to 122 °F)

Operation .............–25 °C to +50 °C (–13 °F to 122 °F)

Humidity ..................max. 90% RH non-condensing

Mechanical

Enclosure....................................ABS/PC

Enclosure rating.................................IP 30

Flammability class, materials ...................UL 94 5VB

Dimensions ................................ see Fig. 1

Weight ...............................0.4 kg (0.88 lb)

Inputs/Outputs

Inputs X2–X3 for fan status and alarm sensor:

Voltage across open contact............23 V DC ±1 V DC

Current through closed contact ...................4 mA

Minimum pulse input duration .....................17 s

Outputs V1–V4 for heating/cooling (triac):

Type of actuator..................... increase/decrease

Minimum output voltage ...........supply voltage – 1.5 V

Maximum load................................0.8 A

Relay outputs for fan on-off control, K1 and KC1:

Maximum voltage .......................... 24 V AC

Maximum load................................. 2 A

Input for bypass button on wall module:

Minimum pulse input duration .................. 250 ms

Inputs for zone temperature and discharge/mixed air sen sors,
B1–B2:

Thermistor type ......... NTC, 1800 Ohm at 25 °C (77 °F)

Measuring range ........–10 °C to 50 °C (14 °F to 122 °F)

Accuracy ...........................±0,2 °C (±0.4 °F)

Input R1, setpoint adjustment on wall module:

Type.................... 10 kOhm linear potentiometer

Adjustment range....................... ±5 °C (±9 °F)

Accuracy ...........................±0,1 °C (±0.2 °F)

Application Program

Cycle time .......................................5 s

Indication LED Colors

Power On .....................................green

Service..........................................red

LonMark Standard

................... LonMark Interoperability Guidelines

..............LonMark Functional Profile: RTU Controller

Communication protocol ........................LonTalk

Physical channel ......................TP/FT-10, 78 kbps

Neuron type ............................3150, 10 MHz

Agency Compliances

Emission:

CE ..................EN 61000-6-3, C-Tick, FCC Part 15

Immunity:

CE ..................................EN 61000-6-1

Safety:

CE ....................................EN 61010-1

UL 916, C-UL US, Enclosed Energy Management Equipment
(TAC Xenta 104-A/24)
Approved for plenum installations (TAC Xenta 104-A/24)

RoHS directive............................2002/95/EG

Part Numbers

Controller ................................007305910

Manual .................................04-00068-01

Plug-in Terminal Blocks TAC Xenta 100 ..........007309140

03- 00132-02-en

Figure 1

Outdoor

A

ir Sensor

Economizer

Heating

stage

Alarm

Fan

Wall

Module

Discharge air

Temperature

sensor

G

Fan

Status

Cooling

stage

W1 W2 Y1 Y2

Mixed air

Temperature

sensor

1

2 2

2

03- 00132-02-en

APPLICATION EXAMPLE

Figure 2

1) Only relevant in stand alone installations.

2) One of the sensors can be used in a stand alone installation.

Both can be used in a network installation.