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TAC Xenta® 300Programmable Controller 2 Mar 2005

Subject to modification.

TAC Xenta® 300 belongs to a family of programmablecontrollers designed for small and medium-sized heatingand air handling systems.A TAC Xenta 300 controller holds full HVAC functionalityincluding control loops, curves, time control, alarm handling,etc.Two different I/O configurations are available in the TACXenta 300 series controllers, which includes the TACXenta 301 and TAC Xenta 302. If required, separate I/Omodules may be added. Both the controllers and I/Omodules are designed for cabinet mounting.The TAC Xenta 300 controller is simple to program usingthe graphical application programming software, TACMenta®.The controller communicates on a LONTALK® TP/FT-10network via a twisted-pair, unpolarized cable. It is able tooperate as a stand-alone unit, but can also easily beconnected to a large LONWORKS based network.

Supply Voltage ............................. 24 V AC ±20%, 50/60 Hz............................................................... or 19–40 V DC

Power Consumption .............................................. max. 5 WTransformer Sizing...................................................... 10 VAAmbient Temperature (except TAC Xenta 301XT/N/P):

Storage .............................. –20 to +50 °C (–5 to +122 °F)Operation ............................. 0 to +50 °C (+32 to +122 °F)

Ambient Temperature TAC Xenta 301XT/N/P:Storage and Operation ...... –20 to +70 °C (–5 to +158 °F)

Humidity ............................. max. 90% RH non-condensingMechanical:

Enclosure .............................................................. ABS/PCEnclosure rating ........................................................ IP 20Flammability class, materials ........................... UL 94 V-0Dimensions, mm (in.) ..... 180 x 110 x 75 (7.1 x 4.3 x 3.0)Weight ........................................................ 1,0 kg (2.2 lbs)

Real Time Clock:Accuracy at 25 °C (77 °F) ............... ±12 minutes per yearPower failure protection ............................................. 72 h

Digital Inputs (X1–X4):Quantity ............................................................................ 4Voltage across open contact .............................. 33 V DCCurrent through closed contact ................................ 4 mAPulse input duration ....................................... min. 20 ms

Universal Inputs (U1–U4):Quantity ............................................................................ 4

– as Digital Inputs;Voltage across open contact .............................. 26 V DCCurrent through closed contact ................................ 4 mAPulse input duration ....................................... min. 20 ms

– as Thermistor Inputs;TAC thermistor sensor ............ 1800 ohm at 25 °C (77 °F)Measuring range ......... –50 to +150 °C (–58 to +302 °F)

– as Voltage Inputs;Input signal ...................................................... 0–10 V DCInput resistance ................................................. 100 kohm

..................................... accuracy within 1% of full scaleSensor Inputs (B1–B4):

Quantity ............................................................................ 4TAC thermistor sensor ............ 1800 ohm at 25 °C (77 °F)Measuring range ......... –50 to +150 °C (–58 to +302 °F)

Digital Outputs (relays; K1–K6 or K1–K4):Quantity, TAC Xenta 301 ................................................. 6Quantity, TAC Xenta 302 ................................................. 4Control voltage, relay outputs .................. max. 250 V ACControl current, to be protected by max. 10 A fuse,

.......................................................................... max. 2 AAnalog Outputs (Y1–Y2 or Y1–Y4):

Quantity, TAC Xenta 301 ................................................. 2Quantity, TAC Xenta 302 ................................................. 4Control voltage ................................................ 0–10 V DCControl current, short-circuit proof ................... max. 2 mADeviation .............................................................max ±1%

Communication:TAC Menta; modem................... 9600 bps, RS232, RJ45TAC Vista, also for appl. program download (from v 3.1),

............................................... TP/FT-10, screw terminalTAC Xenta OP ............................. TP/FT-10, modular jack

LONMARK® Standard:Interoperability ............ LONMARK Interop. Guidelines v 3.0Application .. LONMARK Functional Profile: Plant Controller

Agency Compliances:Emission ....................................... C-Tick; EN 61000-6-3;

................................... FCC Part 15, Subpart B, Class BImmunity ...................................................... EN 61000-6-1Safety:

CE ............................................................... EN 61010-1UL 916 .................................................. C-UL US Listed

Part Numbers:Electronics part TAC Xenta 301/N/P .............. 0-073-0009Electronics part TAC Xenta 301XT/N/P ......... 0-073-0010Electronics part TAC Xenta 302/N/P .............. 0-073-0011Terminal part TAC Xenta 280/300 ................. 0-073-0901I/O units TAC Xenta . please refer to separate data sheetOperator terminal TAC Xenta OP .................. 0-073-0907TAC Xenta: Programming Serial Kit .............. 0-073-0920

TAC Xenta 300 can also be connected to a TAC VistaSystem®.For local use, the TAC Xenta OP (Operator Panel) can beconnected to a TAC Xenta 300. The OP has an LCDdisplay and push buttons for navigating and altering settings.The OP can be connected to the network via the modularjack on the front of the programmable controllers or byattaching it to the TP/FT-10. The OP can be mounted or itcan be used as a portable terminal.

TECHNICAL DATA

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DESIGN

SOFTWARE FEATURES

The TAC Xenta 300 controller has beendesigned as a general purpose unitary(one-to-one) controller. Thus, it can bemounted in close proximity to the controlledequipment, minimizing the wiring required.The TAC Xenta 300 is microprocessorbased. It consists of a terminal and elec-tronics mounted together (figure 1). TheXenta 300 can be interfaced with a widevariety of field sensors/transducers andcontrolled devices. All terminations of fieldwires are made to the terminal part only.Thus, the electronic part may be removedfor service without affecting the terminalconnections.

Local Operator TerminalThe TAC Xenta OP is a small operatorterminal which can be connected to theunit through its enclosure. The operatorcan read point status, perform manualoverride, read measured values, alter setpoints etc., from the TAC Xenta OP.The functions are selected from menus.Access to the unit is enabled by an accesscode. It is possible to access other TACXenta units on the same network.

Power Failure ProtectionWith non-volatile (flash) memory, the unitwill start up with user defined settings andreturn to normal functioning after a powerfailure.

Real-time ClockThe clock provides data such as year, month,date, day, hour, minute and second.

A built-in capacitor maintains operation ofthe clock for at least 72 hours in the eventof a power failure.

Day-light Saving Time,European or for USA / CanadaOnce set, Daylight Saving Time (DST) isfully automatic. The date of the time change,as well as the magnitude of time changecan be programmed. This function canalso be disabled.

Digital InputsThe DI's are used to sense alarm contacts,status indications, pulse counting, etc.Each digital input can be used as a pulsecounter (e.g. for flow measurement).Another application available when us-ing the TAC Xenta 300 DI is for alarmmonitoring. Each time an alarm is tripped,the corresponding counter can beincremented, providing data for operat-ing statistics. The DI circuits are internallypowered.

Universal InputsThe Universal Inputs can be individuallyconfigured as Analog or Digital inputs.

Figure 1

With the assistance of TAC Menta, agraphical programming tool using Func-tional Block Diagrams (FBDs), theTAC Xenta 300 may be easily adapted todifferent control and monitoring tasks.The basic software includes pre-pro-grammed routines for:– reading of Digital Inputs (alarms, pulse counting,

interlocks)– reading of Universal Inputs (individually select-

able as Analog or Digital)– control of Digital Outputs– control of Analog Outputs– on and off delays– pulse counting (Digital Inputs only)

– alarm handling; alarm conditions may be de-tected via the digital or the analog inputs.

– equipment run time totals, on selected objects.– time schedules (start and stop times in hours

and minutes): weekly and holidays– optimum start/stop programs– control characteristic curves– PID control loops (loops may be connected in

cascade)– from v 3.2 trend logging for up to 50 channels is

possible (hw version 2 required)– connection to one or two optional I/O modules– local level operator interface via TAC Xenta OP– network communication according to the

LONTALK® protocol– communication with the Central System via

modem

The basic software is adapted to the cur-rent application by connecting pre-pro-grammed Functional Blocks and by ad-justing the relevant parameters. Theseconnections and parameters are stored ina non-volatile memory.The parameters may be changed duringongoing operation either from the CentralSystem or locally from the TAC Xenta OP(Operator Panel).

I/O MODULES

A high and a low limit can be set for eachUniversal Input. If configured as DigitalInputs, the Universal Inputs may be used,for example, for sensing switch positions.

The Universal Input types are selectedvia the application program.

Digital OutputsThere are Digital Outputs for the control ofequipment such as fans, pumps or similardevices. The output signal can be pulsewidth modulated and can be used tocontrol increase/ decrease actuators.

Analog OutputsThere are Analog Outputs to control ac-tuators or the connection to controllers.No external power supply is required.

LONWORKS® SNVT SupportThe use of Standard Network VariableTypes according to Echelon® specifica-tion makes it possible to communicatewith network nodes from other manufac-turers.

TAC I/O module DI DO UI TI AO

Xenta 411/412 10 - - - -

Xenta 421/422 4 5 - - -

Xenta 421A/422A 1 - 5 4 2 - -

Xenta 451/452 1 - - 4 3 4 2

Xenta 451A/452A 1 - - 8 2 - 2

Xenta 471 - - 8 4 - -

Xenta 491/492 - - - - 8

TAC Xenta 300 can use up to two I/Omodules from the TAC Xenta 400 seriesdevices.The table gives an overview of the differentnumbers of inputs and outputs available permodule.DI, DO: Digital Input, Digital OutputUI, TI: Universal Input, Thermistor InputAO: Analog OutputThe Xenta 4x2 modules have manualoverrides for the DO or AO, and/or DIstatus indication, where applicable.

1 Status indication only when thecorresponding universal inputs (UI)are used as digital inputs (DI).

2 1.8/10 kohm TI, 0–10 V DC, 0–20 mA, DI3 1.8 kohm TI, 0–10 V DC, DI4 0–10 V DC, 0–20 mA

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COMMUNICATION

SYSTEM CONFIGURATIONS

TAC XENTA NETWORK AND UNIT PERFORMANCE

Communication Capabilities

The TAC Xenta 300 has several communi-cation capabilities within a Network witha central presentation system and/or ahand-held Operator Panel.LONWORKS Connection

TAC Xenta controllers communicate witheach other using a common network,LONWORKS TP/FT-10, 78 kbps. A numberof controllers can form a network andexchange data.

Additional I/O units also connect to thenetwork and may be added as required.An I/O unit can only be associated withone controller.

The LONTALK protocol makes it possible touse Network Variables defined in equip-ment from third party manufacturers.

The Functional Block applications areModeled as true LONMARK® Controller Ob-jects.

The Network Variable interface (includingthe Standard Network Variable Types,SNVTs) can be customized, and ExternalInterface Files (XIFs) can be generatedwith the TAC Menta tool.

TAC Vista Presentation System

When connected to a TAC Vista CentralSystem, the operating conditions of thefans, pumps, recovery units, etc. can bemonitored in color graphics or printedreports. Temperatures and alarms can beread, while setpoints, time settings maybe altered as required.

TAC Xenta controllers can communicatewith TAC Vista in one of the followingways.

1 All nodes on the LAN via a PCLTA card.

2 A specific programmable controllervia the RS232 connection, possiblyvia modem (all v 3.x).

3 Any programmable controller in thenetwork via TAC Xenta 901 LonTalkadapter (and an optional modemconnection), with the added possibilityfor the programmable controller toinitiate the dial-up (the latter only for v3.2).

Starting with v 3.1 controller software,application programs generated in TACMenta may be downloaded fromTAC Vista via the network.

TAC Xenta OP Port

The operator panel is also connected tothe network and can thus act as an opera-tor panel for other units in the network.The connection is made to the modularjack on the front of the controller or di-rectly to the network cable.

RS232 Port

The TAC Xenta 300 controller has anRS232 port. This port is intended for directconnection to a PC with the TAC Mentaprogramming tool for loading the applica-tion program.

The port can also be used for connec-tion between TAC Vista and specificTAC Xenta 300 units (see 2 under“TAC Vista Presentation System”above).

The TAC Xenta 300 controllers can beused in different configurations.

• Stand-alone

• Controllers and OPs in a network, withextra I/O modules as required

• Controllers, OPs, I/O modules and otherequipment in a full network with suit-able adapters, possibly with connec-tion to a TAC Vista Central System (CS)

Figure 2 shows an example of TAC Xentanetwork configuration.

Sensors and actuators on the Field levelare mostly connected to the conventionalinputs/outputs of the controllers or I/O-modules.

Some external units, however, may con-nect directly to the network to communi-cate input/output data, using StandardNetwork Variables (SNVTs).

Figure 2

Per TAC Vista Server:No. of programmable controllers .... 400No. of I/O modules .......................... 200No. of Operator Panels ................... 100No. of TAC Xenta Groups ................. 30No. of programmable controllers

per Group .................................... 30

Per TAC Xenta Base unit:

No. of I/O modules .............................. 2

No. of STR350/351 (non-SNVT mode)...................................................... 2

* Subscriptions may utilize SNVTs or TACNVs(TAC Network Variables). These may becombined if the following restrictions areobserved: The sum of the TACNV subscriptionsand the number of SNVT members (no. ofvalues in structured SNVTs) must not exceedthe stated figures.

No. of subscriptions*In ........................................ max. 15Out ...................................... max. 30

Trend logging in TAC Xenta 300(from v 3.3, hw version 2)

Channels ............................... 1 – 50Interval ................ 10 s – 530 weeksTotal logging cap. ~ 4000 float. no.s.......................... or ~ 8000 integers............... or ~ 60 000 digital values

Optimized storage ..................... Yes

+ -

TACVista

TAC Xenta OP

TP/FT-10

TAC Xenta OP

TAC Xenta 302 TAC Xenta 301

TAC Xenta 901

TACVista

IP Network

TAC Xenta 511

Managementlevel

Automationlevel

Fieldlevel

I/O- module I/O- module

or

Webbrowser

PCLTAcard

Application sizeprogram and data ......... max. 56 kBparameters .................... max. 64 kB

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INSTALLATION

MAINTENANCE

The two TAC Xenta 300 controllers have dif-ferent outputs. The adjacent table shows theterminal connections of the twoTAC Xenta controllers.

There is a label on the front of the controllerwith both the numbers and the names of theterminals (1 C1, 2 C2 and so on). The numbersare also shown in the plastic of the terminalpart.

Note! Installation of high voltagecables must be performed by quali-fied personnel!

For detailed information, please refer to theTAC Xenta 280/300/401 Handbook (part no.0-004-7768).

Operator PanelThe operator panel is easily connected to thenetwork by means of the modular socket on thefront of the controller.

LED IndicatorAn indicator on the electronic unit of theTAC Xenta 300 indicates when the applicationprogram is running.

Service PinTo simplify network commissioning, there is aservice pin on the electronic unit which, whenpressed, identifies the unit on the network.

Caring for the controller includes keeping it dryand cleaning it externally with a dry cloth whenneeded.

CABLES

G and G0:Min. cross-sectional area 0.75 and1.5 mm² (19 and 16 AWG).Cable with modular jack for RS232 serialcommunication port: Max. 10 m (32 ft.).

Terminals X1–X4:Min. wire size 0,25 mm² (23 AWG).Max. cable length 200 m (650 ft.).

Terminals U1–U4, B1–B4, Y1–Y4:Min. wire size of 0,25–0,75 mm²(23 to 19 AWG).Max. cable length 20–200 m(65 to 650 ft.) (see TAC Xenta 280/300/401 manual for details).

Terminals K1–K6:Wire size 0,75–1,5 mm² (19 to 16 AWG).Max. cable length 200 m (650 ft.).

Max. bus length, Max. node-to-node Max. length,Cable doubly terminated, distance, singly termi- singly terminated

bus topology, m (ft.) nated, free topology, m (ft.) free, topology, m (ft.)

Belden 85102, single twisted pair 2700 (9000) 500 (1600) 500 (1600)Belden 8471, single twisted pair 2700 (9000) 400 (1300) 500 (1600)UL Level IV 22AWG, twisted pair 1400 (4600) 400 (1300) 500 (1600)Connect-Air 22AWG, one or two pairs 1400 (4600) 400 (1300) 500 (1600)Siemens J-Y(st)Y 2x2x0.8 900 (3000) 320 (1000) 500 (1600)4-wire helical twist, solid, shieldedTIA568A Cat. 5 24AWG, twisted pair 900 (3000) 250 (820) 450 (1500)

MOUNTING

The TAC Xenta 300 controller is cabinetmounted on a TS 35 mm Norm railEN 50 022.The controller consists of two parts; aterminal with the screw terminals, and theelectronics with the circuit boards. Tosimplify installation, the terminal can bepre-mounted (see figure 1).If the Xenta 300 controller is to be wallmounted, a wide range of standardizedboxes are available.

TAC and TAC products are trademarks and/or registered trademarks of TAC AB.All other trademarks belong to their respective owners. Copyright 2004 © TAC AB. All rights reserved.

www.tac.com

C1 and C2:TP/FT-10 allows the user to wire thecontrol devices with virtually no topologyrestrictions. The max. wire distance in onesegment depends on the type of wire andthe topology (see the table below).The TAC Xenta Network guide (0-004-7460) gives a more detailed description.

148 ± 2.0 (5.8 ± 0.1)

Ø 4.0(0.2)

48 ±

0,5

(1.9

±0.

02)

16.1

(0.6)

180 (7.1)

77.4 (3.1)

45(1.8)

110(4.3)

180 + 0.4 (7.1 + 0.02) to the next TAC Xenta 280/300/3000

174 + 0.4 (6.9 + 0.02) to the next TAC Xenta 400/500/900

mm (in.)

Terminal Connections: Outputs

Term. Term.name Description

No. 301 302

21 G G 24 V AC (or DC+)22 G0 G0 24 V AC common23 Y1 Y1 0–10 V24 M M Output neutral25 Y2 Y2 0–10 V26 – Y3 0–10 V27 – M Output neutral28 – Y4 0–10 V29 – –30 – –

31 K5 – Relay32 KC3 – K5, K6 common33 K6 – Relay

34 K1 K1 Relay35 KC1 KC1 K1, K2 common36 K2 K2 Relay

37 K3 K3 Relay38 KC2 KC2 K3, K4 common39 K4 K4 Relay

40 – –

}

Terminal Connections: InputsTerm. Term.name Description

No. 301/302

1 C1 LONWORKS

2 C2 TP/FT-10, 78 kbps3 U1 Universal4 M Measurem. neutral5 U2 Universal6 U3 Universal7 M Measurem. neutral8 U4 Universal9 B1 Thermistor10 M Measurem. neutral

11 B2 Thermistor12 B3 Thermistor13 M Measurem. neutral14 B4 Thermistor15 X1 Digital16 M Measurem. neutral17 X2 Digital18 X3 Digital19 M Measurem. neutral20 X4 Digital