Panasonic UJ20 Series Operating instructions
Matsushita Electric Works, Ltd.
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How to use the UJ20 external inputs/outputs and
modes / Troubleshooting
Page Title
1How to use the UJ20 external inputs/outputs and modes /
Troubleshooting
2 Emergency stop of UV irradiation – 1: EMERGENCYsignal
3 Emergency stop of UV irradiation -2: STOP signal
4 Emergency stop of UVirradiation -3: [EMISSION] SW
5 UVirradiation by an external signal (foot SW) (when using one head)
6 UVirradiation by an external signal (foot SW) (when using one head)
7 How to use BUSY signals
8 How to use BUSY signals (Connection of UVirradiation indicators)
9 START signal modes: PULSE/STATUS
10 UVirradiation starting by SW-on and stopping at a preset time
11 UVirradiation while holding SW on and stopping at the preset time
12 Collective/individual lighting control of multiple heads (ALL/MULTI)
13 Collective lighting control of multiple heads [ALL]-[PULSE]
14 Collective lighting control of multiple heads [ALL]-[STATUS]
15 Individual lighting control of multiple heads [MULTI]-[PULSE]
16 Individual lighting control of multiple heads [MULTI]-[STATUS]
17 Lighting control of the heads in pairs using two foot SWs
18 UVirradiation only by signal inputs regardless of time setting
19 UVirradiation only by signal inputs regardless of time setting: [MNL]
irradiation
20 UV irradiation pattern switching
21 UV irradiation pattern switching
22 Remedies for outputs of [ALARM] and [ERROR] warning signals
23 UVirradiation is impossible although [ERROR] is not displayed
24
Precautions for simultaneous input of the START signal to multiple UJ20
controllers
25 UJ20 inputs/outputs (I/O terminal arrangement)
26 UJ20 inputs/outputs (I/O specifications)
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Emergency stop of UV irradiation - 1:
EMERGENCY signal
Equipment
design
Use the [EMER] signal to stop the UV irradiation of UJ20.
Terminals [11] and [12] are shorted by a shorting bar as a factory default.
Connect an emergency stop SW between these terminals so that the signal input can be
turned off when the SW is pressed, and a forced stop of UV irradiation will be possible even
in the middle of the process.
1: While the [EMER] signal input is off, the [READY] signal is off,
and UV irradiation is not possible.
2: If the [EMER] input is turned off during UV irradiation,
it will stop, and the [ERROR] signal will be output.
Connect an emergency
stop SW between
[EMER]=[11] and
[COM]=[12] by B-contact.
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Emergency stop of UV irradiation -2: STOP signal
Use the [STOP] signal terminal [9] to stop the UV irradiation of UJ20.
When the signal is input between terminals [9] and [12], the UV
irradiation will stop, and the [ERROR] signal will be turned on.
[ERROR] is output because the UV irradiation has not completed.
Input [STOP] again or hold down the [SET] key to release
the [ERROR] signal.
COM
ERROR
START
STOP
T
START
UV
STOP
ERROR
Equipment
design
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Emergency stop of UV irradiation -3:
[EMISSION] SW
Operation
Press the [EMISSION] SW on the panel to stop the UV
irradiation.
When the UV irradiation is stopped by the [EMISSION] SW,
[ERROR] is output because the UV irradiation has not
completed.
Hold down the [SET] key to release the [ERROR] signal.
[EMISSION]
T
READY
UV
START
EMISSION
ERROR
START
COM
READY
EMER.
ERROR
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UV irradiation by an external signal (foot SW)
(when using one head)
When using a foot SW or other external signal to start the UV irradiation, use the [START]
input terminal for easier connection.
When using only one LED head, connect the head to [CH1], and connect the foot SW
between terminals [1] and [12].
Don’t remove the shorting bar between terminals [11] and [12].
(Since the bar is used for an emergency stop signal, the UV irradiation is disabled if the
connection is off.)
Connect the SW
between [START1]=[1]
and [COM]=[12]
by A-contact.
SW
Foot SW
UV irradiation
Preset UV
irradiation time
Equipment
design
Matsushita Electric Works, Ltd.
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UV irradiation by an external signal (foot SW)
(when using one head)
When using a foot SW or other external signal to start UV irradiation,
use the [START] input terminal for easier connection.
UV irradiation starts when the [START] signal is received
while the [READY] signal is on.
During UV irradiation, the [READY] signal is off,
and the [START] signal input is ignored.
START
COM
READY
EMER.
T
READY
UV
START
T
Equipment
design
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How to use BUSY signals
The [BUSY] output signals stay on during UV irradiation by the corresponding heads from
CH1 to CH4.
The BUSY1 to BUSY4 signals are output for heads CH1 to CH4 independently.
Even if the output is set to 0% by the irradiation pattern setting, these signals are output.
These signals can be used for controlling the indicator that is lit during UV irradiation by
each head.
T1
STOP
UV-1
BUSY-1
START
T2UV-2
BUSY-2
READY
ERROR
START
COM
READY
BUSY-1
BUSY-2
BUSY-3
BUSY-4
Equipment
design
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How to use BUSY signals
(Connection of UV irradiation indicators)
UJ20 has a 5 V DC (250 mA) external power supply.
Use this power supply and BUSY1 to BUSY4 in combination, and UV
irradiation indicators can be directly connected without any external
devices.
If the head cable length exceeds 2 m, use the BUSY signals to install
UV irradiation indicators in an easily viewable location for safety
purposes.
The external power supply is 5 V DC, and the maximum allowable load
current is 250 mA in total. The maximum allowable load current for
each BUSY signal is 100 mA.
+5 V DC
BUSY-1
BUSY-2
BUSY-3
BUSY-4
COM
-+
BUSY-1
BUSY-2
BUSY-3
BUSY-4
5-24 V DC
Equipment
design
Matsushita Electric Works, Ltd.
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START signal modes: PULSE/STATUS
There are two START signal modes: [PULSE] and [STATUS].
[PULSE]: UV irradiation starts when an external START pulse signal is input.
When the preset time has elapsed, UV irradiation stops.
[STATUS]: While an external START signal is input, UV irradiation continues.
When the START signal is turned off within the preset time, the irradiation stops.
When the preset time has elapsed, irradiation stops even if the START signal is still on.
T
T
T
START
UV
START
UV
[PULSE]
[STATUS]
PULSE
STATUS
Equipment
design
Matsushita Electric Works, Ltd.
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UV irradiation starting by SW-on and stopping at
a preset time
UV irradiation starts when the foot SW is stepped on (momentary input = no
need for keeping the SW stepped on), and stops when the preset time has
elapsed.
[PULSE]: UV irradiation starts when an external START pulse signal is
input.
When the preset time has elapsed, UV irradiation stops.
(1) The UV irradiation starts when the [START] signal is received while the [READY] signal is on.
The UV irradiation starts when the [START] signal is input, and stops when the preset time has
elapsed.
(2) When the UV irradiation stops, the [READY] signal is turned on.
* During UV irradiation, the [READY] signal is off, and the [START] signal input is ignored.
* When the [STOP] signal is input, the UV irradiation stops, and the [ERROR] signal is turned on.
PULSE
T1
STOP
UV-1
BUSY-1
START
READY
ERROR
START
COM
READY
BUSY-1
STOP
ERROR
Equipment
design
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