Kikusui PLZ-3WH Series, Operation Manual

Page: 95 / 172

Chapter 4: Operating Procedure
4-55
(c) Control with external switch (multiple load units)
After several load units are connected as illustrated below, you can simultaneously control the load on/off for all the
units from outside. J1 terminals 5 and 6 are isolated from the load terminal, which means that the unit will operate even
if a potential difference occurs on the negative load terminal of each load unit.
J2
5
6
No. n unit
J2
5
6
No. 2 unit
5
6
J1
J2
5
6
Master unit
5
6
J1
SW
or MCB or SWon
the front panel, etc
Fig. 4.6-11
4.6.5 External Control of Range Select
Using the external control connectors, you can control the range select of the CC or CR mode externally. However, to
select the range externally, the range set from the panel must be H.
Connect the external switch to J2 terminals 4 and 15 of the load unit rear panel (see the figure below).
15
4
+15V
10k Ω
COM
Equivalent circuit
J2
SW
SW
Range ON OFF
"L"
*
*：
Set value on the front panel
15
J1
CPU
Fig. 4.6-12
NOTE
The external switch (SW) takes precedence over range selection from the operation panel. Therefore,
when this external switch is turned on and the range L is selected, the range cannot be changed to H from
the panel. A current of about 0.5 mA is supplied to the external switch and its release voltage is about
+15 V. Be sure to return the current to the J2 terminal 4.