NetPod Series Analogue Output Solution

Introduction

The 4004-16OUT is a 16 channel analogue output solution which has been designed to operate with the NetPod 4000 series of data acquisition hardware. The systems will operate across any type of Ethernet LAN or directly to a PC using a suitable network cable.
The system is built up using independent 4 channel cards. The maximum update rate is only limited to the sampling rate of the analogue data acquisition systems. All of the output channels are synchronised to the operation of the analogue input channels.

NPAO16-1030 Card

Output
Card
Terminals

30 mA current loop
or +/- 10V output
signal

Load

Connecting an load circuit to the NPAO16-1030

+/- Output

Output Connection from the NPAO16-1030

The image below shows how to connect

to the NPAO16-1030 to obtain a voltage output

Pre-set Initialisation / Startup levels

Each output channel can be independently configured using the driver software to give a pre-set output level on initialisation. The card has an initial zero level initialisation value held for 2 seconds after which the preset level is output. Since the output signal can be predefined then

The initial output level is zero no matter which output signal type has been chosen.

Load Circuit

The maximum load resistance that can be directly connected to the the NPAO16-1030 is 350 Ohm.

No Channels

Isolation

to 2 KV DC

Range

+/- 10V
+/- 30 mA

Protection

short circuit < 1 min

Resolution

0.3 mV
0.001 mA

Integral Non linearity

+/- 1 LSB

Power

< 1 W / Channel

Operation

The analogue output cards support both voltage and current output under control from the driver software. The update rate of the output signals is at the same rate as sampling rate of analogue input channels.

Installation Limitation

The 4004-16OUT supports 16 analogue output channels within a single instrument along with a single digital I/O card.

Output Signal Type Selection

The analogue output signal can be switched under software control between current and voltage without any user interaction on the card itself. The driver software must scan the network to obtain and store any new configuration details.

Test Results

The output errors shown below are worst case and are to be used as a guide only.

Setting

100 W

300 W

0 W

% Error
Full Scale

-30

-30.001

-29.989

-30.007

-0.05

0.05

-0.05

-0.001

-0.05

30.002

29.989

30.008

0.05

-0.05

0.04

Load Resistance

100 W

300 W

0 W

NPAO16-1030

NPAO16-1030v101.ppp

Processor Card - NP-OT4000-100T

Specification

Output Signal Type Identification

The output signal type for each channel can be identified by the driver software. Signal operational details can be accessed and processed by third party applications.