Performance Indicators - Veichi Electric VC-4AD User Manual

2.2 Performance indicators

Projects
Conversion speed
Voltage input
Analogue
input range
Current input
Digital output
Ultimate voltage
Ultimate current
Voltage input
Resolution
Current input
Precision
Isolation
2.3 Indicator light description
Projects
Signal indicator
Expansion module rear stage interface
Expansion module front interface
3 Characteristic settings
The input channel characteristics of the VC-4AD are the linear relationship between the channel analogue input quantity A
and the channel digital output quantity D, which can be set by the user. Each channel can be understood as the model shown in
Figure 3-1, and since it is a linear characteristic, the characteristics of the channel can be determined by determining two points P0
(A0, D0) and P1 (A1, D1), where D0 indicates that when the analogue input is A0 D0 indicates the channel output digital quantity
when the analogue input is A0 and D1 indicates the channel output digital quantity when the analogue input is A1.
A
Channel
Analog input
Channel model
Figure 3-1 Schematic diagram of the channel characteristics of the VC-4AD
In consideration of the user's ease of use and without affecting the realization of the function, in the current mode, A0 and
A1 correspond to [Actual Value 1] and [Actual Value 2] respectively, and D0 and D1 correspond to [Standard Value 1] and
[Standard Value 2] respectively, as shown in Figure 3-1, the user can change the channel characteristics by adjusting (A0,D0) and
(A1,D1), the factory default (A0,D0) is the external The factory default (A0,D0) is the 0 value of the external analogue input,
(A1,D1) is the maximum value of the external analogue input. This is shown in Figure 3-2.
Table 2-2 Performance indicators
Indicators
2ms/channel
-10Vdc to +10Vdc, input impedance
1MΩ
-20mA to +20mA, input impedance 250Ω
Current setting range: -2000 to +2000
Voltage setting range: -10000 to +10000
± 12V
± 24mA
1mV
10μA
± 0.5% of full scale
The analogue circuitry is isolated from the digital circuitry by an opto-coupler. The analogue
circuitry is internally isolated from the module input 24Vdc supply. No isolation between
analogue channels
RUN status indicator, blinking when normal
ERR error status indicator, illuminated on failure
Connection of rear modules, hot-swappable not supported
Connection of front-end modules, hot-swappable not supported
D
Digital Output
4
4 channels can be used simultaneously.
Description
D
P 1
D1
D0
P0
A0 A1
Channel Characteristics
A