TAC Vista
TAC Xenta 421A/422A
Universal Input and Digital Output Module
TAC Xenta 421A and 422A are Universal Input/Digital Output modules in the TAC Xenta family. They can be used as normal Xenta I/O modules or as certified LonMark® devices.
Both modules have four universal inputs and five digital outputs. The universal inputs can be used as digital, thermistor, current, or voltage inputs.
In addition, TAC Xenta 422A is equipped with LED status indicators, one for each digital input, and manual override switches for the digital outputs. The LED colors, red or green, can be selected individually by altering the parameter settings in TAC Menta® graphical tool.
The TAC Xenta 421A/422A is linked to a specific controller with the assistance of the TAC Menta.
If several controllers and I/O modules are used in the same network, a special software called the Device Configuration Tool is used during installation.
The input/output status can be checked using the TAC Xenta OP (Operator Panel) when connected to any TAC Xenta controller in the same network. The TAC Xenta OP has a display and a small number of push buttons to facilitate the taking of readings and altering settings.
Technical Data |
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Supply voltage . . . . |
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.24 V AC ±20%, 50/60 Hz |
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or 21.6–40 V DC |
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Power consumption . . |
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. max. 4 W |
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Transformer sizing . . |
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. . . 8 VA |
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Ambient temperature: |
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Storage . . . . . . |
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–20 to 70 °C (–4 to 158 |
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Operation . . . . . |
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0 to 50 °C (32 to 122 |
°F) |
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Humidity . . . . . . . . . max. 90% RH non-condensing Mechanical:
Enclosure . . . . . . . . . . . . . . . . . ABS/PC Enclosure rating . . . . . . . . . . . . . . . . IP 20
Flammability class, materials . . . . . . |
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. UL 94 V-0 |
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Dimensions . . . . . . . . . . . . |
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see diagram |
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Weight . . . . . . . . . . . . . . |
0.2 kg (0.44 lbs) |
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Universal Inputs (U1–U4): |
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Quantity . . . . . . . . . . . . . |
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. . 4 |
– as Digital Inputs; |
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Voltage across open contact . . . . . . |
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20 V DC |
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Current through closed contact . . . . . |
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. 3 mA |
Pulse input duration . . . . . . . . . |
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min. 20 ms |
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–as Thermistor Inputs;
TAC thermistor sensor . . . . . 1800 ohm at 25 °C (77 °F) or (indiv. selectable) TAC thermistor 10 kohm at 25 °C (77 °F) Measuring range . . . . . . –50 to 150 °C (–58 to 302 °F)
Measuring precision . . . . . . . . . see table overleaf
–as Current Input;
Input signal (terminals U–M; over-current protected) 0–20 mA
Input resistance . . . |
. . . . . . . . . . . . 47 ohm |
Inaccuracy . . . . |
. within ± (0.03 mA + 0.4% of reading) |
–as Voltage inputs;
Input signal . . . . . . . . . . . . . . . 0–10 V DC Input resistance . . . . . . . . . . . . . >100 kohm
Inaccuracy . . . . . . . . ± (7 mV + 0.2% of reading)
Digital outputs (relays; K1–K5):
Quantity . . . . . . . . . . . . . . . . . . . . 5 Control voltage, relay outputs . . . . . max. 2A, 250 V AC Control current, to be protected by max. 10 A fuse,
. . . . max. 2 A (greater current allowed for short periods) LED digital input status indicators (TAC Xenta 422A only):
Quantity . . . . . . . . . . . . . . . . . . . . 4 Color . . . . . . . red or green, selectable in TAC Menta
Manual override for digital outputs (TAC Xenta 422A only): Quantity . . . . . . . . . . . . . . . . . . . . 5 Switch positions . . . . . . . . . . . ON, AUTO, OFF Indicators for Auto output status . . . . . . . green LEDs
Communication, transciever type FTT10A:
Network . . . . . Echelon LonWorks® TP/FT-10, 78 kbps LonMark® standard
Interoperability . . . . LonMark Interop. Guidelines v 3.3
LonMark Functional Profiles:
Analog Input . . . . . . . . . . . . . . . . #0520 Digital Output . . . . . . . . . . . . . . . #20543
Agency Compliances: Emission
. . .C-Tick; EN 61000-6-3; FCC Part 15, Subpart B, Class B Immunity . . . . . . . . . . . . . . EN 61000-6-1 Safety:
CE . . . . . . . . . . . . . . . . . . EN 61010-1 UL 916 . . . . . . . . . . . . . . C-UL US pending
Part numbers:
Electronics part TAC Xenta 421A . . . . . . .0-073-0245 Electronics part TAC Xenta 422A
(with LED indicators and DO override) . . . . 0-073-0246 Terminal part TAC Xenta 400 . . . . . . . .0-073-0902 Operator terminal TAC Xenta OP . . . . . . 0-073-0907
03-00012-02-en
Design
TheTAC Xenta 421A/422A consists of a terminal and a circuit board mounted together (figure 1).
All terminations of field wires are made to the terminal.Thus, the electronics may be removed for service without affecting the terminal connections.
Universal Inputs
The Universal Inputs can be individually configured as Analog or Digital Inputs, or as pulse counters. A high and a low limit can be set for each Universal Input. If configured as Digital
Inputs, the Universal Inputs may be used for sensing switch positions.
The Universal Input types are selected via the application program.
Digital Outputs
There are five Digital Outputs for the control of equipment such as fans, pumps or similar devices.The output signal can be pulse width modulated and can also be used to control increase/decrease actuators.
mm (in)
LED Indicators
There are two general LED indicators on the front of the module. One is red and lights up if there is a hardware fault. The other is
green and blinks to indicate that the module is online.
The TAC Xenta 422A is equipped with four
additional status indicators, one for each universal input used as a DI.
The corresponding LED can be configured in TAC Menta to light up either when the input status is ON or when it is OFF.
The 422A digital input status indicator color, red or green, can be selected individually by altering the settings in TAC Menta.
Pulses are always indicated with green 
LEDs. Figure 2
TAC Xenta 422A also has five switches (ON, AUTO,OFF), for manual control of the outputs, andfivegreenLEDsthatindicatethestatusofthe signal generated by the connected controller.
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Figure 1
Mounting
TAC Xenta 421A/422A is cabinet mounted on a TS 35 mm DIN rail EN 50022. The Input/Output module consists of two parts: a terminal with screw terminals and electronics with circuit board. To simplify installation the terminal can be pre-mounted in the cabinet (see figure 1).
If the module is to be wall mounted, a wide range of standardized boxes are available.
Cables
G and G0:
Min. wire size of 0.75 mm2 (18 AWG).
C1 and C2:
The TP/FT 10, 78 kbps system allows the user to wire the control devices with virtually no topology restrictions. The max. wire distance in one segment depends on the type of wire and the topology.
For network segments installed as bus topology, using the Belden 85102 cable, the max. cable length is 2700 m (9000 ft.).
For other applications, please refer to the TAC Xenta Network guide. The wires
are polarity insensitive, but must be a twisted-pair.
Terminals U1–U4:
Min. wire size 0.25 to 0.75 mm2 (18 to 22 AWG).
Max. cable length 20 to 200 m (66 to 660 ft.). (Please refer to the 0-004-7771 TAC Xenta 400 I/O Modules handbook for details).
Terminals K1–K5:
Min wire size of 0.75 to 1.5 mm2 (18 to 16 AWG).Max. cable length 200 m (660 ft.).
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03-00012-02-en |
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