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4-22 Chapter 4: Appendix E - 20mA Current Loop Option

Intellicon-NT960/PCI User's Manual, ver. 0.02

Appendix E: 20mA Current Loop Option

You may order the ACM/Flex16 with 20mA Current Loop Serial

Line Interface Modules. ). The 20mA Current Loop SLIM offers

the following features:

 A passive 20mA Current Loop electrical interface.

 The 20mA Current Loop receivers and transmitters are

optically isolated.

 Each SLIM controls four ports.

 LEDs on the ACM/Flex16 indicate the electrical interface in

use for a specific group of four ports.

 SLIMs are field upgradeable, providing you with more

flexibility for your application.

Please refer to Figure 21 for a partial schematic of the 20mA

Current Loop SLIM.

Figure 21: 20mA Current Loop partial schematic

TxD +

TxD -

20mA Current Loop SLIM: partial schematic

HPCL

4100

+5V

TxD

+5V

RxD

HPCL

4200

RxD +

RxD -

CTS

DCD

Note: The 20mA Current Loop Serial Line Interface Module

controls four ports, and therefore the schematic shows only a

portion of the circuit.

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