Chapter 2 Product Type
SPM20 consists 1 controller（SPM20-CTRL）and 30 measurement unit at most which
has split core（SPM20-CTO）and solid core（SPM20-CTC）for the option or mixture
use.
Model list：
SPM20-CTRL
AC: 3×220/380V，power supply from A phase voltage wire
SPM20-CTO
Rated current 10（50）A，accuracy 2.0, hole 9.5mm
SPM20-CTC
Rated current 5（63）A，accuracy 2.0, hole 8mm
The RJ12 among the measurement units by the daisy chain, the length are only by
6cm or 30cm for the site installation option, and the length of every measurement
wire（PLbus）must not be more than 300cm.
Chapter 3 Figure & Installation
3.1 Figure dimension
unit：mm
Figure 1 : controller dimension
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