IT-E121A Communication Module
The DB9 interface connector on the rear panel of the DC load is TTL voltage
level; IT-E121A is derived from IT-E121 (not including communication cable).
The main difference is that the DB9 female connector on the RS232 end is
converted to a male connector.
IT-E121A communication cable
IT-E122 Communication Module
The DB9 interface connector on the rear panel of the DC load is TTL voltage
level; IT-E122 has a USB interface (male connector B) on one end, you can
use IT-E122 and a standard USB extension cable (type B female connector at
one end and type A at one end) to connect the DB9 interface connector of the
DC load and the USB interface connector of computer for the communication.
After connecting the load and computer by USB, you need to install IT-E122
driver (download from ITECH official website or contact ITECH agent). The
device manager of PC will display ‘Prolific USB-to-Serial COM Port’ after
installing.
IT-E123 Communication Module
The DB9 interface connector on the rear panel of the DC load is TTL voltage
level;
The interface on both side port of IT-E123 are DB9 interface and RS485
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