wtw MIQ/Blue PS SET, Operating Manual

Page: 15 / 46

MIQ/Blue PS Installation
3 - 5 ba75573e04 05/2009
Additional terminating
resistor on the MIQ/
Blue PS
An additional terminating resistor is only required if, except in the MIQ/
Blue PS, no other terminator switch is available on the IQ S
ENSOR
N
ET
island. The terminating resistor is connected to one of the three
SENSORNET connectors (Fig. 3-4). The terminating resistor must
bridge the two outside terminals of the SENSORNET connector. The
SENSORNET connector can still be used to connect a sensor.
Fig. 3-4 MIQ/Blue PS with additional terminating resistor
Examples of the correct
setting of the terminator
switches
The figure on the following page demonstrates with several examples
of IQ S
ENSOR
N
ET
islands how the terminator switches and terminating
resistors are correctly set.
6
8
7
9
2
1
3
5
4
SN terminator
switch ON
additional terminating resistor
X13 X12
100...
240V AC
NETZ/MAINS
L1 N
X11 X10
24V DC
EINGANG
INPUT
POWER
SENSORNET 2 SENSORNET 1
ON
EIN
OFF
AUS
X6
RO
T
RED
RO
T
RED
SN
TERMINA
TO
R
SCHIRM SHIELD
GRÜN
GREEN SCHIRM
SHIELD
GRÜN GREEN
X5
X4
X3 X2 X1
SENSORNET 3
X8
X9
X7
RO
T
RED SCHIRM SHIELD GRÜN GREEN
+
-
R R R
connection selectable