1
1. PW-A SERIES
1-1. About This Manual
This manual applies to the following PW-A series power supply units and optional interface units.
PW-A series:
PW18-1.8AQ
，
PW18-1.3AT
，
PW18-3AD
，
PW36-1.5AD
PW18-3ADP
，
PW18-2ATP
，
PW16-5ADP
，
PW8-3ATP
PW26-1AT
，
PW36-1.5ADP
，
PW18-1.3ATS
，
PW26-1ATS
PW8-3AQP
、
PW16-2ATP
、
PW24-1.5AQ
、
PW8-5ADPS
Optional interface units for the PW-A series:
IF-41RS
，
IF-41GU
，
IF-41USB
Note
：
The IF-41 series are compatible with all models of the PW-A power supply unit series shown
above. The previous IF-40 series are not compatible with the PW8-3AQP, PW16-2ATP,
PW8-5ADPS and PW24-1.5AQ.
Use the IF-41 series, not IF-40 series, for the PW8-3AQP, PW16-2ATP, PW8-5ADPS and
PW24-1.5AQ.
“YB” models with built-in factory options
1-2. Outline of Product
The PW-A series are dropper type multi-output DC stabilized power supply units. With the tracking,
delay and four-point preset functions, each unit has a wide variety of applications. The optional
interface boards IF-41GU, IF-41RS and IF-41USB are built in the PW-A series and interface with
computers. Each PW-A series power supply unit connected with a computer is connectable with
another PW-A series power supply unit through the local bus, allowing construction of an intelligent
power supply system. It is possible to control all power supply units in the system and read back the
current and voltage values from the computer.
1-3. Features
1-3-1. PW-A power supply unit
- The tracking function may vary the voltage and current of each channel at he same ratio (or by an
absolute value). It may be set for each output. It is possible to vary all outputs simultaneously.
- The delay function may turn on or off a specific channel after a delay of specified time in the
multi-output mode. It is possible to set the delay time of each channel independently between 0 to
10 seconds.
- With a CPU and four preset memory units, the PW-A power supply unit may store preset voltage
and current of each channel. This function enables easy switching of the voltage (or current).
- The output voltage and current are displayed on seven-segment, four-digit red LED indicators. Fine
adjustment functions are provided for accurate setting.
- It is possible to turn on or off each channel independently. The LED clearly indicates in which
status, CV or CC, each channel is.
- It is possible to select PRESET 1 to PRESET 4, turn on or off MAIN OUTPUT key, detect an OHA
alarm and input an alarm through the external contacts.
- The YB option is available. This factory option lowers the output voltage quickly when output is
turned off with no load or light load. "YB" is added to the product code of a model with this option.
(Example: PW18-1.8AQYB)
- The PW18-1.3ATS and PW26-1ATS have remote sensing terminals in the C channel.
The PW8-5ADPS have remote sensing terminals in both channels.
Use the remote sensing terminal to compensate for voltage drop caused by the wires.
