Figure 14 Relay Connection: Pwd22/52 Supplies; Table 8 Control Logic Of Relay Controls 1, 2, And 3 - Vaisala PWD22/52 User Manual

Chapter 4 _______________________________________________________________ Installation
NOTE
VAISALA _______________________________________________________________________ 41
Below is a table of a control logic example of relay controls 1 and 2 and
3 when all the relay controls are driven by visibility limits.
Table 8 Control Logic of Relay Controls 1, 2, and 3
Relay States
1 OFF 2 OFF 3 OFF
1 ON 2 OFF 3 OFF
1 ON 2 ON 3 OFF
1 ON 2 ON 3 ON
When the third relay control output is set to be driven by the hardware
status, it pulls whenever a hardware alarm is detected. For details, see
section System Configuration Commands on page 62.
PWC board
VB12V
Control 1
DGND
wires: X3-9 or X4-5 PNK
X4-5 VIO
X4-6 GRY/PNK
X4-7 RED/BLU
Figure 14 Relay Connection: PWD22/52 Supplies
Figure 14 above illustrates external relays connection when relay coils
are powered by PWD22/52. Voltage pin VB 12 V and relay controls 1, 2,
and 3 are wired by default.
Do not load any of the relay control output pins by more than 35 mA or
any Ext Vb voltage output pin by more than 200 mA.
Corresponding Visibility Conditions
When visibility is higher than all the
limits.
When visibility is lower than LIMIT 1
but higher than LIMIT 2 and LIMIT 3.
When visibility is lower than LIMIT 1
and LIMIT 2 but higher than LIMIT 3.
When visibility is lower than all the
limits.
Cable
X3-9
(X4-5)
X4-6
X4-7
X4-5
X4-8
Box
Relay 1
Relay 2
Relay 3
1008-015