Kikusui KFM2151, Operation Manual

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KFM2151
3-9
Operation
3.5 Logical Channel Configuration
Logical channels and SENSING terminal
The channels on the KFM2151 are logical channels. You can assign arbitrary
SENSING terminal numbers to be assigned to channels (logical channels). Up to 32
logical channels can be set separately for impedance and voltage.
On the SENSING terminal, TERM+ is high potential and TERM- is low potential.
Isolated from the chassis electric potential (withstand voltage of 250 V). The input
impedance is approximately 1 M
Ω.
Because the channels are logical channels, channel numbers can be changed without
having to change the connection to the measurement point. It is also possible to
assign the same SENSING terminal number to multiple logical channels.
By factory default, the SENSING terminal numbers and logical channel numbers
match. In the connection shown in Fig.3-5, channel 1 scans cell 1.
Fig.3-5 Logical channel config u ration (factory defa u lt condition)
Here, we change the configuration of channel 1. The SENSING terminals are
assigned to the voltage and impedance logical channels as shown below.
Assign TERM+3 and TERM-2 to voltage channel 1. The negative terminal of cell 2
and the positive terminal of cell 3 are assigned, and the series voltage of cells 2 and
3 is scanned.
Assign TERM+2 and TERM-1 to impedance channel 1. The negative terminal of
cell 1 and the positive terminal of cell 2 are assigned, and the series impedance of
cells 1 and 2 is scanned.
Fig.3-6 Logical channel config u ration (example in w hich channel
1 is changed)
Fuel cell
SENSING
terminal
Cell 1 Cell 2 Cell 3
Wire
Channel 1
By factory default, the SENSING terminal
numbers and voltage/impedance channel
numbers match.
Fuel cell
SENSING
terminal
Cell 1 Cell 2 Cell 3
Wire
Impedance channel 1
(TERM-1, TERM+2)
Voltage channel 1
(TERM-2, TERM+3)
Configuration of channel 1 whose
voltage and impedance have
been changed