PCIM-DAS160216 16通道16位A/D，双突发模式D/A和32个数字I/O线

Description

PCIM-DAS160216 16通道16位A/D，双突发模式D/A和32个数字I/O线

PCIM-DAS160216 16通道16位A/D，双突发模式D/A和32个数字I/O线

Channel Select switch
Set the channel mode configuration with switch S1. The analog inputs of the PCIM-DAS1602/16 can beconfigured as eight differential channels or 16 single-ended channels. Use the single-ended input mode if youhave more than eight analog inputs to sample. Using the differential input mode allows up to 10 volts ofcommon mode (ground loop) rejection and will provide better noise immunity.

This switch is factory-configured for eight differential inputs. The Channel Select switch shown in Figure 3 isset to the “8” position. To configure for 16 channels, set this switch to 16

A/D Range Select switch
The A/D converter range is set by switch S2. This switch controls all A/D channels.

Although you cannot run some channels bipolar and some unipolar, you can measure a unipolar input in thebipolar mode (for example, you can monitor a 0 to 5V input with a channel set to the ±5 V range). This switchis factory-configured for bipolar. The A/D Range Select switch shown in Figure 4 is configured for unipolar.

Trigger Edge Select jumper

The original Keithley MetraByte DAS-1600 was designed such that A/D conversion initiates on the falling edgeof the convert signal. Neither the original DAS-16, nor any of the other DAS-16 derivative converts on thefalling edge of the signal. In fact, we are not aware of any A/D board that uses the falling edge to initiate theA/D conversion.

When using the falling edge to start the conversion, the A/D may be falsely triggered by 8254 pacer clockinitialization glitching. False triggering is easy to avoid, but may occur in the DAS-1600. Since initiatingconversions on the falling edge is undesirable, but initiating on the rising edge may lead to timing differences ifthe PCIM-DAS1602/16 board is used as a replacement for an older DAS16 series board, the PCIMDAS1602/16 is equipped with a jumper that you can use to select the edge that initiates the A/D conversion.

The Trigger Edge Select mode is configured by jumper P8. This jumper is factory-configured for rising edge.

For compatibility with all third party packages, with all DAS-16 software, and with PCIM-DAS1602/16software, leave this jumper in the default rising edge position.