2-16
VL-1225/6 Analog Input/Output Board
Input Voltage Range
The board may be operated with an input range of 0 to +10 volts, ±10 volts, or ±5 volts. The 0 to +10 volt
range is preferred for signals which do not go negative, since the per volt resolution is twice that of the
±10 volt range. If the input signals do not exceed ±5 volts, the ±5 volt range is preferred for the same
reason. Input voltage range selection applies to all input channels.
Jumper
Jumper
Jumper
Jumper
Jumper
As
As
As
As
As
Block
Block
Block
Block
Block
Description
Description
Description
Description
Description
Shipped
Shipped
Shipped
Shipped
Shipped
V3
Input Voltage Range Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V
V3
1-3
= In,
V3
2-4
= Out,
V3
5-7
= Out,
V3
6-8
= In
– ±5V
V3
1-3
= In,
V3
2-4
= Out,
V3
5-7
= In,
V3
6-8
= Out
– ±10V
V3
1-3
= Out,
V3
2-4
= In,
V3
5-7
= Out,
V3
6-8
= In
– 0 to 10V
Figure 2-15. Input Range Selection
Input Resolution
The A/D converter can be jumpered to provide 10 bits or 11 bits of resolution. 10-bit mode is used for
compatibility with Analog Devices RTI-1225/6 boards, it provides 1024 digital counts. 11-bit mode provides
2048 counts for applications which require twice the resolution. Input resolution applies to all input
channels.
Jumper
Jumper
Jumper
Jumper
Jumper
As
As
As
As
As
Block
Block
Block
Block
Block
Description
Description
Description
Description
Description
Shipped
Shipped
Shipped
Shipped
Shipped
V14
Analog Input Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-Bit
V14 = In
– 10-Bit
V14 = Out
– 11-Bit
Figure 2-16. Input Range Selection
Configuration – Analog Input Configuration
