PRODUCT
Current Loop Communication Expansion Kit
OP-SB1C
Overview
This expansion set supports the measurement of current loop communication which is still used in FA as a communication method resistant to external noise.
Applicable analyzers: LE-3500XR, LE-2500XR, LE-3500R, LE-2500R, LE-1500R, LE-3500, LE-2500, LE-1500
Feature
● Online monitoring of commonly used 10mA to 40mA current loop
● High-speed monitoring of current loop communication is available
● Passive and active simulation transmission output
● Current (20mA/40mA) at the active setting can be selected by DIP switch
● Signal polarity (current presence/absence) setting during non-communication corresponding to a line in which multiple nodes are connected by current loop
● Easy connection with the terminal block
● High-speed monitoring of current loop communication is available
● Passive and active simulation transmission output
● Current (20mA/40mA) at the active setting can be selected by DIP switch
● Signal polarity (current presence/absence) setting during non-communication corresponding to a line in which multiple nodes are connected by current loop
● Easy connection with the terminal block
Current loop measurement pod (adapter for current loop)
<Description of the dip switch>
| Switch No. | OFF | ON | |
|---|---|---|---|
| 1*1 | SD side | Passive | Active |
| 2*2 | 20mA supply | 40mA supply | |
| 3*1 | RD side | Passive | Active |
| 4*2 | 20mA supply | 40mA supply |
*1: Set OFF for monitoring.
*2: The value of current loop is avaiable, only when "Active" is selected.
<Image of internal circuit (when set to passive type)>
<Internal circuit image (when set to active type)>
*: When monitoring, the transistor is always on.
Image of connection with current loop device to be testes
<Connection for monitoring>
<Connection for simulation (when working as active)>
<Connection for simulation (when working as passive)>
<Connection for simulation (when working as passive using an external DC power source)>
