VIGOR ELECTRIC CORP.
VB-4DA
4-Channel Analog Outputs Module
1. Introduction
●
The VB-4DA analog output module has four output channels. The output channels take in a
digital value and output an equivalent analog (voltage or current) signal. This is called a D/A
conversion. The VB-4DA has maximum resolution of 8 bits.
●
The selection of voltage or current based output is by user wiring. Analog ranges of 0 ~ 10 V
DC and/or 0 ~ 20 mA maybe selected independently for each channel.
●
The VB-4DA analog output module is attached as an extension to the VB series Programmable
Logical Controller (hereinafter referred to as “PLC”), and the VB-4DA is attached as an
extension to the VB series PLC Main Unit. Each VB-4DA functions as a special module
which transfers data with the PLC using the FROM / TO instructions, and would not occupy
any input or output point. Up to 8 special modules can be connected to single VB2 series PLC;
a single VB0 series PLC can connect with two special modules.
2. Specifications
<< Power Requirement >>
●
5 V DC, 30 mA (for internal control)
Supplied from PLC Main Unit (or Expansion Unit / VB-PWR) via its extension cable.
○ From a Main Unit:
[ (The amount of Expansion Modules) + (The amount of Special Modules) X 2 ]
≤
4
○ From an Expansion Unit or VB-PWR:
[ (The amount of Expansion Modules) + (The amount of Special Modules) X 2 ]
≤
12
●
24 V DC (+20% / -15%), 120 mA Max. (for analog signal output)
Supplied from external power supply or 24 V DC output of PLC.
<< Analog Output Performance Specifications >>
Item
Voltage Output
Current Output
Voltage or Current outputs are selected by BFM #0 & different terminals
Mode
0
1
2
4
5
Analog Output Range (DC)
0 ~ +10 V
0 ~ +5 V
+1 ~ +5 V
0 ~ +20 mA +4 ~ +20 mA
Digital Input Range
0 ~ +250
0 ~ +250
External Load Resistance
500 Ω ~ 1 MΩ
500 Ω or less
Resolution
40 mV
20 mV
16 mV
80 μA
64 μA
Overall Accuracy
± 1% (full scale)
Conversion Speed
0.8 ms / 4 points
Isolation
Photocoupler isolation between analog and digital circuits.
DC/DC converter isolates of power from its power source.
No isolation between analog channels.
----------------------------------------------------------------
2
----------------------------------------------------------------
