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KATflow 210
5 Commissioning
5.5 Inputs/Outputs
5.5.1 Modbus RTU
An RS 485 interface is used for networking up to 32 flowmeters to a centralised
computer system. Each flowmeter is given an unique address to be able to com -
municate effectively. The communication protocol used conforms to the conven-
tions of the Modbus RTU protocol, a description of which is given in a separate doc-
ument. Please refer to customer support for further information.
Wiring
Setup
Please refer to customer support.
Operation
Please refer to customer support.
5.5.2 HART compatible output
The KF210 can also be configured with an optional module which responds to out-
put commands conforming to the HART protocol. Please refer to customer support
for further information.
HART® is a registered trademark of the HART Communication Foundation.
Wiring
Setup
Please refer to customer support.
Operation
Please refer to customer support.
5.5.3 Analogue current output 0/4 ... 20 mA
The analogue current outputs operate in a 4 ... 20 mA or 0 ... 20 mA span.
Current outputs may be assigned to process values in the “mode” section of the
output menu. The outputs can be programmed and scaled within the menu struc-
ture.
Wiring
Electrical
characterist-
ics
0/4...20 mA active and 4...20 mA passive options.
Galvanically isolated from main electronics and from other I/O's.
Passive: U=9...30 V, RLoad=50 ohm typical.
Resolution: 16 bit, accuracy: 0.1 % of MV.
Active: RLoad<500 ohm, U=30 V.
Resolution: 16 bit, accuracy: 0.1 % of MV.
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Analogue outputs