Setting The Current Source For 20 Ma Current Loop; Reference Point Of The Protection Circuitry; Table 5-11: Current Source - Jumper J22(3) And J23(4); Table 5-12: Protection Circuitry - J24 And J5 - Addi-Data ADDICOM PA 7400 Series Technical Description

PA 7400

Setting the current source for 20 mA Current Loop

Table 5-11: Current source - Jumper J22(3) and J23(4)

Current source
Transmitted current
source
Receiving current
source

Reference point of the protection circuitry

Port
Serial port 1
Serial port 2
16
Jumper settings

Table 5-12: Protection circuitry - J24 and J5

Settings
Technical description
Description
Active transmission
The board supplies the transmission
loop with current
Passive transmission
The peripheral supplies the
transmission loop with current
Active reception
The board supplies the reception
loop with current
Passive reception
The peripheral supplies the reception
loop with current
Description
Derivation of interference potential
through secondary ground GNDA of
the DC/DC converter
Derivation of interference potential
through Pin 1 of the 25-pin. SUB-D
male connector
Derivation of interference potential
through secondary ground GNDB of
the DC/DC converter
Derivation of interference potential
through board bracket
Chapter 5
Delivery
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Delivery
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