Moxa TCC-120I [7/18] Built in rs 485 addctm intelligence

Built-in RS-485 ADDC

Intelligence

ADDC™ (Automatic Data Direction Control), a Moxa leading technology,

uses a clever hardware solution to take care of the RS-485 data flow control

problem. ADDC™ is a hardware data flow solution that automatically senses

and controls data direction, making the handshaking signal method

unnecessary.

Isolation

Moxa’s electrical isolation technology uses two photo couplers to create a

gap in each electrical signal. One photo coupler transforms the electrical

signal into a light signal, which is transmitted across a small gap, and then

the other photo coupler transforms the light signal back into an electrical

signal. In this way, the two electrical circuits are completely isolated from

each other, limiting the damage that could otherwise be caused by ground

loops in the electrical signal.

Reverse Power Protection

The Reverse Power Protection feature provides extra protection against

accidentally connecting the power cables to the wrong terminal. The

converter is designed to automatically detect which power wire is positive

and which is negative, and then adjust the power supply accordingly.

DIP Switch Selectable Terminator

For many products of this type, the termination resistor is set by a jumper

located inside the product’s casing, so that the user must open the casing to

disable or change the resistor’s strength. Moxa offers a better solution. The

TCC-120/120I’s terminator is set with a DIP switch located on the outside of

the converter’s casing.

Auto Baudrate Detection

The TCC-120/120I incorporates a method for automatically detecting the

serial signal’s baudrate by hardware. This is an extremely convenient

feature for the user. Even if a device’s baudrate changes, the signal will still

be transmitted through the RS-422/485 repeater without any problems.