Yokogawa DR240 - Manual (Page 17)

1-2 IM DR232-01E
1.2 Product Overview
This product is a hybrid recorder which can record and measure from small-scale 10-ch data up to
widely distributed 300-ch multi-point data.
The number of measurement points can be expanded up to a maximum of 300-ch by connecting
up to six subunits (DS400/DS600) to a main unit (DR232/242). Using dedicated extension cables
between units, interconnections can be extended up to 500 m. Since measured objects scattered
over a wide area can be wired fast and with a minimum of wiring, a flexible, extensive
measurement system can be configured. The input modules to be incorporated in the DR232/242
or DS400/600 can be selected from the following, to suit your measurement conditions:
• Universal input module and DCV/TC/DI input module
Temperature, DC voltage and contact signals can be measured, but cannot be connected to the
main unit.
• mA-input Module
This module can directly measure DC currents ranging from -20 mA to 20 mA since it contains
shunt resistors. It cannot be connected to a system's main unit.
• Power Monitor Module
This module can measure the effective voltage, effective current, active power, reactive power,
apparent power, frequency, power factor and phase angle for an AC voltage or AC current input.
It is available in either a single-phase or three-phase model. This module cannot be connected to
a system's main unit.
• Strain Input Module
This module can measure strain. It is available in either a model with built-in 120- or 350- Ω
bridge resistors or a model with NDIS terminals where bridge resistors are connected externally.
The module cannot be connected to a system's main unit.
• Pulse Input Module
This module can measure pulses. It cannot be connected to a system's main unit.
• Digital input module
This module can measure contact signals. It cannot be connected to a system’s main unit.
• Communication interface module
This module is necessary when communicating with a personal computer. Measurement
conditions can be set and data acquired via the communication interface (GP-IB, RS-232-C, etc.)
of this dule. This module can only be connected to the main unit.
• Alarm module
This module can output alarm signals as contact signals. The module can be connected to the
main unit or the subunit.
• DI/DO module
This module allows a signal to be output in the case of alarm, failure, or chart end and a remote
control signal for the product to be input. The module can be connected to the main unit or the
subunit but only one module in all units.
Note
When the following handling is done, it is necessary to carry out “system construction” to operate the
instrument correctly. After executing system construction, confirm the module information. For details,
see page 9-16.
• Connection (including addition or replacement)/removal of subunits, or unit number setting (see page 3-
7)
• Mounting (including addition or replacement)/removal of modules