3 Technical Description TAC Xenta, TAC Xenta® 400 I/O Modules
22 (48) TAC AB, Dec 2004
0-004-7771-3 (EN)
3.4 TAC Xenta 421A/422A Universal Input and
Digital Output module
The modules have four universal inputs and five digital outputs. The
universal inputs can be used as analog inputs, digital inputs or pulse
counters.
The TAC Xenta 422A is also equipped with LED status indicators for
each universal input (when used as digital inputs) and manual override
switches for the digital outputs. The LED colors, red or green, and the
polarity (lit when contact is open or closed) can be selected individually
by altering the parameter settings in TAC Menta.
Terminals (421A, 422A) and Switches/Indicators (422A)
These modules can also be used as certified LONMARK® devices. The
configuration and use of SNVTs are explained in the 0FL-4181 Config-
uration Instruction.
Fig. 3.5: TAC Xenta 421A/422A terminals and TAC Xenta 422A relay output switches and Indicators
DO
TAC Xenta 422A
ON
AUTO
OFF
2 3 4 5 1 2 3 4
DI
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
K1 K1C K2 K2C K3 K3C K4 K4C K5 K5C
G G0 C1C2 U1 M U2 U3 M U4
max 230 V AC
~ 0
}
Comm
}
24 V AC
(21.6−40 V DC)
5 Relay output
Indicators (green)
4 DI Indicators:
red/green
Table 3.3: TAC Xenta 421A/422A summary
Type No. TAC Menta Block type Terminal ref. Ind./Override (422A)
Universal
inputs
4 AI - Analog input or
DI - Digital input or
CNT - Pulse counter
U1 - U4
U1 - U4
U1 - U4
red or green / -
Relay outputs /
Digital outputs
5 DO - Digital output or
DOPU - Dig. pulse output
K1 - K5
K1 - K5
green
a
/ ON-AUTO-OFF
green
a
/ ON-AUTO-OFF
a. Note! The five output indicators always show the AUTO output status, irrespective of
th
e output override switch position (ON-AUTO-OFF).
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