Kikusui PAT160-25T, Operation Manual

Page: 86 / 218

5-14
PAT-T 4kW
External voltage (Vext) connection
Use a low-noise and stable voltage source for Vext. The noise in Vext is multiplied
by the amplification factor of the PAT and appears at the PAT output. Thus, the
output ripple noise may not meet the PAT’s specifications.
To minimize the influence of noise on the output, use a two-core shielded wire or a
twisted-pair wire to connect the control terminals and Vext. Make the wires as short
as possible. Susceptibility to the effects of noise increases as the wires get longer.
When wires are long, proper operation may be hindered even if a cable with anti-
noise measures is used.
When using a shielded cable, connect the shield to the - (neg.) output terminal. If the
shield needs to be connected to the Vext side, See “When using the external voltage
(Vext)” on page 5-8.
Pins 19 and 20 of the J1 connector are used.
Fig.5-9 Connection of the o u tp u t c u rrent control u sing Vext
Output terminal
Chassis terminal
Sensing terminal
+S
-S
PAT
J1
V ext
+
–
Two-core shielded or
twisted-pair wire
25 26
19 20
1 2
J1
19
20