NI CFP-AO-210 Analog Output Module

NI CFP-AO-210 Analog Output Module

DESCRIPTION

These operating instructions describe how to install and use the National Instruments FP-AO-210 and cFP-AO-210 analog output modules (referred to inclusively as the [c]FP-AO-210). For information about configuring and accessing the [c]FP-AO-210 over a network, refer to the user manual for the FieldPoint network module you are using.

Features

The [c]FP-AO-210 is a FieldPoint analog output module with the following features:

• Eight 0–10 V outputs 

• 12-bit resolution 

• Sources 1 mA per channel (up to 10 mA with optional external power supply) 

• Overcurrent indicators 

• 2,300 Vrms transient overvoltage protection between the inter-module communication bus and the I/O channels 

• –40 to 70 °C operation 

• Hot plug-and-play

Installing the cFP-AO-210

The cFP-AO-210 mounts on a Compact FieldPoint backplane (cFP-BP-x). Hot plug-and-play enables you to install the cFP-AO-210 onto a powered backplane without disturbing the operation of other modules or connector blocks. The cFP-AO-210 receives operating power from the backplane.

Voltage Output Circuit

The [c]FP-AO-210 output circuit is a current-limited voltage source capable of sourcing (flowing out of the Vout terminal to the load) or sinking (flowing into the Vout terminal from the load) current. The [c]FP-AO-210 internal circuitry limits the magnitude of this current to 1 mA. You can obtain up to 10 mA sourcing current by adding an optional external power supply. The [c]FP-AO-210 operates with an external power supply from 15 to 30 VDC.

The [c]FP-AO-210 updates the output channels as new values are sent to it by the network module. The time it takes to respond to a change on a single channel is between 3 and 6 ms. The response time to changes on all eight channels is 24 to 27 ms.

Output Range

The [c]FP-AO-210 has an output range of 0–10 V. The factory default power-up setting for each channel is 0 V. The [c]FP-AO-210 has overranging of 0.2 V. Therefore, the actual full-scale range of each channel is 0–10.2 V. This extended range enables the [c]FP-AO-210 to compensate for span and offset errors in field devices.

Current Limit Detection

Each channel on the [c]FP-AO-210 has a monitoring circuit that detects the amount of current flowing into (sinking) or out of (sourcing) the channel. If this value exceeds the maximum allowable (1 mA with no external supply; 10 mA with external supply), the circuit lights a red STATUS indicator for each affected channel, reports the error to the network module, and adjusts the output voltage so that only the maximum allowed current flows. The error is reported before the output is adjusted. The indicator may start to light dimly as the limit is approached.

Overvoltage Protection

Each [c]FP-AO-210 output terminal Vout is protected against damage resulting from accidental connection to the output terminals of other channels. Also, you can connect one or more channel output terminals directly to an external voltage source indefinitely without causing damage or improper operation of other channels, as long as the maximum voltage does not exceed the range of –10 to 20 VDC referenced to the C and COM terminals.

Specifications

Power Requirements

Power from network module ............600 mW

Isolation Voltage

Channel-to-channel isolation............No isolation between channels

Transient overvoltage........................2,300 Vrms

Environmental

Operating temperature ......................–40 to 70 °C

Storage temperature..........................–55 to 100 °C

Humidity ...........................................10 to 90% RH, noncondensing

Maximum altitude.............................2,000 m

Pollution Degree ...............................2