PWX
71
3
External Con
trol
Controlling the Output On and Off States
This section explains how to use an external contact to control the output on and off states.
To reduce the influence of noise on the output, connect a 2-core shielded wire or a twisted-
pair wire across the external contact, and keep the wire as short as possible. If the wiring is
long, it becomes easy for noise to influence the operation of the PWX series. Even if you use
wires that are designed to suppress noise, the PWX series may not operate properly.
If you use a shielded cable, connect the shield to the negative output terminal.
To use an external contact to control the output on and off states, set the appropriate CONFIG
parameter (CF09: on). Then, select the logic setting from the following two options.
•
Turn the output on with a low signal (CF10: Lo)
Output is turned on when a LOW (0 V to 0.5 V) or short-circuit is applied to pin 1 of the J1
connector.
•
Turn the output on with a high signal (CF10: Hi)
Output is turned on when a HIGH (4.5 V to 5 V) or open-circuit is applied to pin 1 of the J1
connector.
When you have used an external contact to turn the output off, the OUTPUT key on the front
panel becomes invalid.
Controlling the output on and off states (in this example, a high signal is used to turn the
output on)
External contact connection
Use pins 18 and 19 of the J1 connector.
The open-circuit voltage across pins 18 and 19
is approximately 5 V. The short-circuit current
across pins 18 and 19 is approximately 0.5 mA.
Use external contacts that have a contact rating
of 0.5 mA or more at 5 Vdc.
If two or more units are floating and you are
using a single external contact to turn output on
and off for all the units, use a relay or similar
device for the external contact signal to isolate the signal transmitted to each unit.
WARNING
Risk of electric shock.
• The insulation of the external contact (S) and the connected cable must be greater
than or equal to the isolation voltage of the PWX series.
For the isolation voltage of each model, ”Specifications” on page 93.
• When using shielded cables for the connection, protect the uncovered sections of
the shielded cable by using insulation tubes whose withstand voltage is greater than
the PWX series isolation voltage.
See
On
Off
H = On
L = Off
▼ represents that the OUTPUT key has been pressed.
The external contact has
been used to turn output
on, so the OUTPUT key
is enabled.
External
contact
The OUTPUT key is
disabled. Even if you
press it, output is
not generated.
To use the external contact to
turn output on again,
first turn the output off.
Output
2-core shielded wire or
twisted-pair wire
Output terminals
J1
18
19
PWX
S
Summary of Contents for PWX1500H
Page 10: ...10 PWX This page is intentionally blank...
Page 26: ...26 PWX This page is intentionally blank...
Page 88: ...88 PWX This page is intentionally blank...
Page 89: ...Maintenance This chapter explains how to perform cali bration DELETE...
Page 92: ...92 PWX This page is intentionally blank...
Page 120: ...120 PWX This page is intentionally blank...
Page 121: ...Appendix A Options B Troubleshooting...