Extrel MAX300-RTG - 4-20 Ma Analog Inputs: KL3012 and KL3022; 4-20 Ma Output: KL4021 and KL4022 Modules

MAX300-RTG: Installation Manual Hardware Installation
47
correspond to 20mA. Physical access to this communication channel is via
terminals on modules installed on a fieldbus I/O system. The communication loops
are supported with the KL4021 module and KL4022.
4-20mA Analog Inputs: KL3012 and KL3022
Figure 22: KL3012
The KL3012 and KL3022 analog input terminals handle signals in the range from 0 to
20mA. The current is digitized to a resolution of twelve bits and is transmitted in
electronically isolated form to a higher-level automation device. The KL3012 and
KL3022 versions combine two channels in one housing. Any open lead or overload
condition is detected and the terminal status is relayed to the controller. The run LEDs
give indication of data exchange with the Bus Coupler. Error LEDs indicate an overload
or a broken wire.
4-20mA Output: KL4021 and KL4022 Modules