Connection Terminals; Notes - DOLD MULTITIMER MK 7850N/200 Manuel D'utilisation

Connection Terminals

Terminal designation
A1, A2
B1(+), A2
X1, X2
X3, X2
Z1, Z2
Z3, Z2
15, 16, 18
21, 22, 24, 25, 26, 28

Notes

Control of A1-A2 with proximity sensors
The input can be controlled by DC 3 wire or AC/DC 2 wire proximity sensors.
For operating voltage > 24 V and usage of sensors without built-in short
circuit protection a protection resistor on A1 is recommendend to reduce
the inrush current. The dimension is as follows:
≈ operating voltage / max. switching current of sensor
R
v
The series resistor must not be selected higher than necessary.
Max. values are:
Operating voltage: 48 V
270 Ω 390 Ω
Series resistor R max:
v
Instantaneous contact
By external wire links the output function of the device can be altered from
2 delayed contacts to 1 delayed and 1 instantaneous contact. The contact
25-26-28 is delayed without bridge on X1-X2, it is instantaneous with bridge
on X1-X2. The legend term is 21-22-24. The instantaneous contact switches
when the operating voltage is connected. To terminals X1 and X2 no other
voltage potentials must be connected, as the unit might be damaged.
Adjustment assistance
The flashing period of the yellow LED is 1 s ± 4 % and can be used to
adjust the time. Especially on the lower end of scale and for long times it
is suitable as the multiplication factors between the different time ranges
are exact without tolerance.
Example:
The required time is 40 min. It has to be adjusted within range
3 ... 300 min.The time check takes too long as several timing cycles would
be necessary for a precise value. For faster adjustment the setting is made
to 0.03 ... 3 min. On this range the potentiometer should be set to 0.4 min
(= 24 sec.). With the right potentiometer setting the LED must show 24
flashing cycles. After that the time range is switched over to 3 ... 300 min.
and the setting is complete.
Time interruption / time adding with B1
With the functions AV, EW, IE and BI the time delay can be interrupted by
controlling input B1 (+) with control voltage. Removing the control signal
will continue the timing cycle (time addition).
Signal description
Auxiliary voltage
Control input (various control possible,
depending on the time function)
Control input (2. delayed C/O contact
or instantaneous contact)
X1/X2 not bridged:
2 delayed C/O contact 25-26-28
nd
X1/X2 bridged:
2 nd instantaneous C/O contact 21-22-24
Control input (Time interruption/time
adding)
X3/X2 bridged:
Time interruption
X3/X2 not bridged:
continued time delay (with time
adding)
Input for connection of a external
potentiometer for time setting t1
Input for connection of a external
potentiometer for time setting t2
1 C/O contact (delayed)
st
2 C/O contact (delayed), if
nd
X1/X2 not bridged
2 C/O contact (instantaneous), if
nd
X1/X2 bridged
60 V 110 V 230 V
680 Ω
1.8 kΩ (1 W)
Notes
Control input B1
The functions RV, IF, AW, AV / RV have to be controlled via input B1
(+) with voltage against A2. The control signal could be the same as
the auxiliary/control voltage of A1 or any other voltage between 12 and
240 V AC or DC. Operating a parallel load between B1 and A2 is also possible.
If with function IF the inputs A1 and B1 are controlled simultaneously a
pulse with the adjusted length is started. With the variant MK 7850N/500
the output pulse can be disabled by setting the slide switch in Position "B".
Time interruption and time addition with X3
On all functions, also with RV,IF, AW (EW/AW) and AB/RV the time delay
can be interrupted during timing by bridging the terminals
X2 - X3. By opening the bridge the time continues (time addition).
While X2 and X3 are bridged the control input is disabled and the yellow LED
remains in the state it had at stop. No external voltage must be connected
to X2 and X3 as the unit may be damaged.
Remote potentiometers
Both settings on variant MK 7850N/500 can also be made by remote
potentiometers of 10 kOhms:
- terminals Z1 - Z2: potentiometer for time t1
- terminals Z2 - Z3: potentiometer for time t2
When connecting a remote potentiometer the corresponding potentiometer
has to be set to min. If no remote potentiometers are required the terminals
Z1-Z2 resp. Z2-Z3 have to be linked.
The wires to the remote potentiometers should be installed separately
from the lines with mains voltage. If this is not possible, a screened cable
is recommendet where the shield is connected to Z2.
To terminals Z1, Z2 and Z3 no external voltage must be connected, as the
unit might be damaged.
Additional function
With the variant MK 7850N/500 additional features can be selected for the
functions position 3, 4 and 7 using the slide switch S1 on the relay front in
position "B". At the same time a second time setting t2 is available on the lower
potentiometer (see Function Diagram) the time range is the same as for t1.
17
MK 7850N/200 / 04.02.22 en / 501A