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Technical Manual Temperature-, Humidity-, Pressure-Controller TAR x260
Digital Input
With the Digital (optocoupler) Input OK 1, normally connected to
mains voltage, a function (preset by P34) can be activated if mains
will be disconnected from this input.
The type TAR 1260 has no optocoupler input, the
function will be activated by opening an external,
isolated contact connected to terminals 18/19.
Never connect mains voltage to this terminals !
P34 = 0
Digital Input is de-activated
P34 = 1
No voltage (1260: ext. contact open) at Digital Input 1
switches to the 2
nd
/night-setpoint. Setpoints will be
increased / decreased by the value of P06.
P34 = 2
No voltage (1260: contact open) at Digital Input 1 starts
an external alarm. After P31 is run down, the internal
buzzer and the alarm relay will be activated.
P34 = 3
If ther is no voltage (1260: contact open) at Digital Input
OK 1 all control functions will be disabled, the display
shows 'oFF'. The unit can only be reactivated by
connecting the input to mains again (1260: external
contact closed).
An adjustable delay (P35) is effectual before one of the functions
above will be started.
Networking of TAR-controllers
All TAR controllers can be networked via their built-
in RS-485-interface. This network can be controlled
by a host unit.
Normally this host is a PC with a qualified software
which allows remote control of units and recording
of all parameters.
Because all units are connected parallel on the
data cable, every unit has its own network address
(P42) to ensure a specific communication.
The communication speed is fixed by P41, the
default value is 9600 Baud.
If networked controllers (1xxx types only) are
supplied by one transformer only and the single
positions must be switched off, use double-pole
switches only.
If not, the unit will be supplied partially over the
shielding of the data connection and continues
operation, depending on the secondary voltage of
the transformer.
Please note: If a unit is not supplied, the PC-
software notifies a unit breakdown !
A better way is not to switch-off the supply voltage
but to disable the unit by Digital Input.
Important:
Never connect the
secondary coil of the transformer to PE!
Attention !
Note polarity while
connecting cables !
= sensor
common
terminal
P E
T
N PE
DO NDO
N PE
T
DO NDO
shielding
N PE
T
T
DO NDO
N PE
T
Connections
as short as
possible !
5 cm max.
(2.0 inch)
DO NDO
2 4 V A C
Attention if
supplied by
one transformer
only :
Switch-OFF
positions
with DPST-
contacts !
P E
N PE
D O N D O
T
N PE
D O N D O
shielding
T
T
N PE
D O N D O
T
N PE
D O N D O
