IS220PAOCH1B, REV B - Analog Output Module

SPECIFICATIONS:

Part Number: IS220PAOCH1B, REV B
Manufacturer: General Electric
Series: Mark VIe
Product Type: Analog Output Module
Number of Outputs: 8 simplex 0-20 mA
Output Compliance: 18 V
Current Feedback Monitoring: 16-bit
Analog Outputs: 0-20 mA, up to 900 Ohm
Output Control: 16-bit DAC
Minimum Output Impedance: 0-20 mA
Accuracy: ±0.5%
Operating Temperature: -30 to 65°C
Size: 8.26 cm high x 4.19 cm wide
Availability: In Stock
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

IS220PAOCH1B, REV B is an Analog Output Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Analog Output Controller (PAOC) provides an electrical interface between one or two I/O Ethernet networks and an analog output terminal board. It features a BPPx processor board and an acquisition board designed specifically for the analog output function. The PAOC supports up to eight simplex 0-20 mA current loop outputs and includes an analog-to-digital converter for current feedback monitoring. Inputs consist of dual RJ-45 Ethernet connectors and a three-pin power input. The terminal board connector connects to the output through a DC-37 pin connector, and diagnostic LEDs indicate the system status.

PAOC I/O PACK INSTALLATION:

• Directly connect the PAOC I/O pack(s) to the connector on the terminal board (s).

• Using the threaded studs next to the Ethernet ports, mechanically fasten the I/O pack(s). The studs slip into a mounting bracket made for the particular style of the terminal board.

• It is important to position the bracket such that the DC-37 pin connector connecting the I/O pack and the terminal board is not subjected to right-angle forces. In the course of the product's service life, the adjustment should only be necessary once.

• Depending on the setup of the machine, connect either one or two Ethernet wires. Either port will work with the I/O pack. When using dual connections, it is customary to link ENET1 to the network connected to the R controller.

• Connect the connector on the side of the PAOC to provide power to the I/O pack. Because the I/O pack has an inherent soft-start feature that regulates current inrush on power application, it is not essential to turn off the power before plugging the cable in.

• If necessary, set up the I/O pack using the ToolboxST* program. Press F1 to bring up the Component Editor's help menu.

ANALOG OUTPUT HARDWARE:

The PAOC features eight simplex 0-20 mA analog outputs with 18 V compliance. Each output is controlled by a 16-bit digital-to-analog converter (DAC) that drives an external transistor amplifier and regulates the output current. A built-in temperature sensor monitors the internal temperature of the board, alerting the control system if it becomes too high. Each analog output includes a mechanical normally open relay that enables or disables the output. When the relay is disabled, the output is routed through the relay, opening the circuit between the customer load and the PAOC’s analog output. The status of the relay is indicated by an LED, using the second normally open contact of the relay.

CURRENT FEEDBACK HARDWARE:

The PAOC provides current feedback monitoring for each of its eight simplex 0-20 mA analog outputs. The output current is measured using a 16-bit analog-to-digital converter and a 50-ohm resistor on the terminal board. The PAOC I/O pack, featuring eight linear, high-compliance analog outputs, has certain operational limitations based on the ambient environment. For PAOCH1B packs, the operating temperature range is -40 to 70°C (-40 to 158°F) when measured from the outside of the pack. However, due to its dense triple board layout, the maximum ambient temperature must be reduced depending on the specific application. The minimum output impedance is defined by the minimum series equivalent resistance of the customer load, as indicated by the terminal board screws across the 0–20 mA output range.

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FREQUENTLY ASKED QUESTIONS:

How does the PAOC monitor the output current?

The PAOC uses a 16-bit analog-to-digital converter along with a 50-ohm resistor on the terminal board to monitor and track the output current.

What does the mechanical relay do in the PAOC?

Each analog output in the PAOC is equipped with a mechanical normally-open relay that controls whether the output is enabled or disabled. The relay status is indicated by an LED.

What is the minimum output impedance?

The minimum output impedance is defined by the minimum series equivalent resistance of the customer load, which is indicated by the terminal board screws across the 0-20 mA output range.