turck BL20 Series - 8.9 Analog input module, 2 AI, current, HART

193
2020/09
8.9 Analog input module, 2 AI, current, HART
This analog input module provides 2 HART inputs for current measurement.
The two channels of the module are galvanically isolated. Additionally, the modules provides gal-
vanic isolation between field level and module bus connection.
NOTE
The following restriction is only valid for the use of PROFIBUS gateways:
The BL20-2AOH-I can only be used with the BL20-DPV1-gateways (BL20-GW-DPV1, BL20-
E-GW-DP)!
Fig. 152: BL20-2AIH-I
Fig. 153: Block Diagram
logic
20 V sensor supply
module supply
V DC 5 module buV DC
HART-
modem
ADC
24
13/23
HART-
modem
ADC
21
12/21
25 mA 25 mA
24 VDC
field
14 11
DC
DC
DC
DC
20 V sensor supply