PQube User Manual 2.1
Page 9 of 113
Your PQube clicks together with several optional modules to provide extra features. To choose
modules for your application, you’ll need to answer four simple questions:
Are you interested in measuring current, power, or energy?
Do you want to power your PQube from 100~240Vac (50/60Hz)?
Are you interested in any of the following: email, a web server, an FTP server, or Modbus
over TCP?
Do you want to record the temperature and humidity in addition to everything about the
electric power?
Measure Current, Power, and Energy
Are you interested in measuring current, power, or energy? If so, you’ll need a PQube current
module. There are three versions; please pick the one that is best for you.
XCT4 – External CTs with current secondary outputs
If you already have CTs (Current Transformers) with current outputs, you
can use an XCT4. This module accepts 1-Amp or 5-Amp CT secondaries.
For more information, see the XCT4 Current Module section (page 19).
XCT5 - External CTs with voltage secondary outputs
If you already have CTs with voltage output, or you purchase them from
Power Standards Lab, you can use an XCT5. This module accepts 0.333 Volt,
1 Volt, 5 Volt, or 10 Volt secondaries. This module comes with five current
channels, allowing you to measure all three phase currents, neutral current,
and earth current simultaneously!
CT4 – Current Sensing Module
If you don’t want to use CTs, the CT4 current module might be right for
you. This module comes in 20Amp and 100Amp versions and has the
CTs built in already. Just pass the conductors through. For more
information, see the CT4 Current Module section (page 20).
Remote Communication
ETH1
Are you interested in any of the following: email, a web server, an FTP
server, or Modbus over TCP? If you need any of these features, you
need an ETH1 Ethernet module. For more information, see the ETH1
section (page 62).
XCT5 and ETH1 combined into 1 module
CTE1
Are you interested in having network capability and measuring current,
but don’t have the space for both an ETH1 module and XCT5 module? Use
a CTE1 module to take advantage of the ETH1 and XCT5 functionality in a
single compact module.
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