Manual PCD2.W525&PCD3.W525│Document 26/853; Edition E2│2008-01-18
Saia-Burgess
Controls Ltd.
Function
Hardware
1-2
1
1.2
Configuration
1.2.1 Module connections/LED
The connections of the module terminal are the following:
Description of the LED:
●
Off:
Module is not powered. U
ext
(24 V) is missing.
●
On:
Module is running without errors
●
Blinking slow: Channel error (Over range/under range/short circuit/open load)
●
Blinking fast: U
ext
is lower than specified (< 19 V)
1.2.2 How to configure the inputs
Each input channel is configured by a DIP-Switch with four switches. The function of
each switch is the following:
Switch nr. Off
On
1
2
3
4
Differential Mode
Gain=1
Single Ended Mode
Current Shunt On
Supply for external Resistors On
Gain=0.25
According to this table, the configuration for the different modes of operation is as fol
-
lows:
Voltage mode
0...10 V
Current mode
0...20 mA
4...20 mA
Temperature mode
Pt1000 (-50...400 ˚C)
Pt500 (-50...400 ˚C)
Ni1000 (-60...200 ˚C)
Resistor mode
0...2500 Ω
1.2.3 How to configure the outputs
Since the outputs are configured by software (with the corresponding FBox or FB),
there is no need to configure the mode of operation of the outputs with any kind of
jumpers or DIP-Switches.
1.3
Function
1.3.1 Power Supply
PCD2.W525 / PCD3.W525 has to be supplied externally! This power supply is gal
-
vanically isolated to both, the PCD and the I/Os of W525. Furthermore, the design
allows using the same power supply for the PCD and for W525 without loosing the
galvanic isolation. These schematics show the different zones of isolation:
