ABB SLTA Option Card Serial LonTalk Datasheet download pdf (Page 61)

Zone Controllers

TAC Xenta 104-A

Roof Top Unit Controller

Lo n Ma r k

certiﬁed controller for small air handling systems and roof top

units for heating, cooling and heat recovery. The room temperature is held

at a constant temperature with sequential control of the heating, cooling

and heat recovery functions. Inlet air and room air temperature can be set

in cascade. The fan mode may be selected to operate continuously during

the occupied mode, or cycle with heating or cooling demand from the zone.

PI control action with individual P-band and I-time setting for heating and

cooling. The controller can be operated on a stand-alone basis or within a

o n Wo r k s

network. Can be monitored and parameters can be set centrally

via the central system or remotely via the TAC Xenta Operator Panel.

SPECIFICATIONS

Operating voltage . . . . . . . . . . . . . . . 24 V AC ±20%

Power consumption . . . . . . . . . . . . . . 4 VA

Dimensions. . . . . . . . . . . . . . . . . . . . . 126x122x50mm(5”x4.8”x2”)

Ambient temperature

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

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

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

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

Inputs and outputs

Fan alarm/status . . . . . . . . . . . . . . . . 2 digital inputs

Cooling valve . . . . . . . . . . . . . . . . . . . 3-point output

Heating valve . . . . . . . . . . . . . . . . . . . 3-point or 2 stages

Fan control . . . . . . . . . . . . . . . . . . . . . Relay output 24 V / 2A

Room temperature . . . . . . . . . . . . . . . Thermistor input

Inlet air temperature . . . . . . . . . . . . . . Thermistor input

Discharge/mixed temperature . . . . . . Thermistor input

Wall module . . . . . . . . . . . . . . . . . . . . As selected

For further speciﬁcations, see technical data sheet.

DESCRIPTION

0-073-0591-0 TAC Xenta 104-A Roof Top Unit Controller

FUNCTIONAL FEATURES

• Various applications:

Single-step control with

cooling, heating or

changeover operation for

cooling/heating. Two-step

control with sequential cooling

and heating.

• Three-point control of the

heating and cooling valves.

• Relay output for fan control.

• Setpointadjustmentviaawall

modulewithsetpointadjuster

or via a L

o n Wo r k s

network

variable.

• Various modes of operation:

heating only, cooling only,

fan only, cooling/heating

(changeover), on, unoccupied,

standby and bypass.

• Various types of fan

operation.

• Configurable limit values MIN

and MAX limit the inlet air

temperature.

• Alarm monitoring high or

low room temperature,

temperature sensor error, fan

error, etc.

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ABB SLTA Option Card Serial LonTalk Datasheet Page 61

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