2 - H - 7
CORONA UNIT SECTION
[5] Transfer/Separation Control
T SHIFT output range 4 to 10 V
Transfer current output range –50 to –600 µV
Transfer and separation is controlled by the CB (control board)
and HV2 (high voltage unit 2).
1. Operation
a. Transfer
A positive DC high voltage is used for transfer.
b. Separation
An AC high voltage is used for separation.
2. Signals
a. Input signals
(1) T SIG (HV2 → CB)
[L] is output when the transfer spark detection circuit
operates.
(2) S SIG (HV2 → CB)
[L] is output when the separation spark detection circuit
operates.
b. Output signals
(1) T CONT (CB → HV2)
Signal which turns the transfer corona unit ON/OFF.
When this signal is [L], the transfer corona unit is ON.
(2) T SHIFT (CB → HV2)
Transfer corona unit output level control signal.
This signal controls the transfer corona unit output
level using analog signals from the CB.
S SHIFT (DC)
S SHIFT (AC)
S CONT
T SHIFT
T CONT
PGND
24VDC
62-B10
62-B8
62-B7
62-B6
62-B5
62-B4
62-B3
62-B2
62-B1
CB
SEPARATION
87-3
87-5
87-6
87-7
87-8
87-9
87-10
87-11
87-12
S SIG
T SIG
HV2
TRANSFER
(3) S CONT (CB → HV2)
Separation corona unit ON/OFF control signal.
When this signal is [L], the separation corona unit is
ON.
(4) S SHIFT (AC) (CB → HV2)
Separation corona unit output level control signal.
This signal controls the separation corona unit output
level (AC component) using analog signals from the
CB.
S SHIFT (AC) output range 4 to 10 V
Separation AC voltage
output range
4.4 to 5.7 kV
(5) S SHIFT (DC) (CB → HV2)
Separation corona unit output level control signal.
This signal controls the separation corona unit output
level (DC component) using analog signals from the
CB.
S SHIFT (DC) output range 4 to 10 V
Separation DC bias voltage
output range
0 to –40 –0 µA
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