Moxa Technologies TCC-80I Series User manual

P/N: 1802000801014
*1802000801014*
TCC-80I/TCC-80I-DB9 Series
Quick Installation Guide
Isolated High-Speed Serial Port Powered
Serial Media Conversion Solution
Version 4.1, January 2021
Technical Support Contact Information
www.moxa.com/support
2021 Moxa Inc. All rights reserved.

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First high-speed, isolated, self-powered RS-232 to RS-422, 2-wire/4-wire
RS-485 bi-directional converter with 2.5 KV isolation and 15 KV ESD
protection.
Overview
The TCC-80I is the world’s first high-speed, isolated, self-powered
converter. It is powered through the host’s RS-232 port and provides
complete signal conversion between RS-232 and RS-422/485 devices.
The TCC-80I coverts back and forth between RS-232’s TxD and RxD lines
to either half duplex 2-wire RS-485 or the balanced signal of full duplex
4-wire RS-422/485. In addition, the TCC-80I provides comprehensive 15
KV ESD protection for all serial lines. Perhaps the most important feature
is the 2.5 KV isolation designed to prevent ground loop currents, reduce
damage caused by data loss, and prevent damage to the communication
interfaces. The TCC-80I is also designed to provide RS-485 auto data
direction control, in which the RS-485 driver is enabled automatically
when the circuitry senses the TxD output from the RS-232 signal.
Programming effort is not required to control the transmission direction of
the half duplex RS-485 signal.
Package Checklist
•TCC-80I or TCC-80I-DB9
•USB Power Cord
•User’s Manual
Applications
•Multipoint data acquisition
•Factory automation
•Remote serial device control
•Building security automation
•Critical industrial control

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Features and Specifications
•Signals:
RS
-232:
RS
-422:
RS-485:
TxD, RxD and GND
TxD+(B) /
-(A),
RxD+(B) /
-(A), GND
Data+(B) / -(A), GND
•Port types:
RS
-232:
RS-422/485:
Female DB9
Terminal Block or Male DB9
•Auto-senses baudrates from 50bps to 115.2Kbps
•RS-232 loopback: RTS to CTS; DTR to DSR and DCD
•Supports automatic RS-485 data direction control with no baudrate
switch settings
•15 KV ESD for all serial RS-232/422/485 signals
•2.5 KV isolation
•Built-in 120 ohm termination resistors for RS-422/RS-485 (DIP
switch selectable)
•Supports up to 32 units connected in an RS-485 multi-drop network
•Serial Power Source: TxD, RTS, or DTR (RTS/DTR ON is
recommended)
•LED Port Power Indicator (switch settings)
•External Power (jack): DC +5V to +12V adaptors or USB Power cord
(DC +5V)
•Operating temperature: 0 to 60°C (32 to 140°F)
•Dimensions: 42 x 80 x 22 mm
•Case: ABS + PC
•Weight: 50 ± 5 g
•CE, FCC Class B approval
•Power Consumption: 20 mA at +5 VDC (termination disabled)
•Warranty: 5 years
Installation
Serial (RS-232) Port Power
The RS-232 port of TCC-80I is designed with a female DB9 socket to
connect directly to the host PC, with power drawn from the TxD, RTS, or
DTR lines. TCC-80I is capable of taking enough power from the attached
Tx line only. For those attached serial RS-232 devices which does not
provide enough power on its Tx line, additional handshake lines should be
connected to TCC-80I. The DC jack of TCC-80I is also provided for
connecting a 5 to 12 VDC power supply via a USB power cord or external
power adaptor.

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Port Power Dissipation
When installing an RS-232 port-powered TCC-80I converter, pay
attention to the power consumption, RS-232 cable length, power
provided by the serial port, and the RS-422 /485 transmission distance.
In general, TCC-80I itself derives 70 mW from the power source; a
standard COM port on a host PC can provide 70 to 90 mW of power if the
TxD, RTS, and DTR lines are connected. Moreover, the RS-232 cable
length should be shorter than 15 m (@ 9600 bps) to ensure that less
power is lost from the host/device to the TCC-80I.
Serial Port Power Compatibility
Serial ports use a diversity of interface chips, but the power provided by
the different ports is not always the same. In fact, some of the ports do
not provide enough power to activate the TCC-80I. The on-board COM1
and COM2 ports seldom have problems. The table shows the add-on
cards and the serial-to-Ethernet device servers that have been tested as
a good power source to drive the TCC-80I.
Multiport Serial Boards
Serial Device Servers
Moxa Boards
CP-168U Series
CP-104U Series
CP-102U Series
C168H Series
C104H Series
Moxa NPort Servers
CN2510
CN2610
NPort5110
NPort5210
NPort5410
NPort5610
NPort6150
NPort6250
NPort6450
NPort6650
LED Port Power Indicator
The best way to ensure the attached serial port provides enough
electricity to the TCC-80I is to check the power indicator LED at the front
panel. To do this, connect the TCC-80I to the target RS-232 port, and
then turn the SW4 switch to the right side to the “Test” mode. The
TCC-80I is receiving enough power if the LED lights up after activating the
attached serial device. If the LED does NOT light up, you will need to
attach the external power cord to the TCC-80I.
NOTE
Be sure to turn the SW4 switch back to Std. mode (the default)
when you finish testing. When in
Test mode, the TCC-80I
WILL
NOT transmit data.

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Optional External Power
Termination is a critical requirement for port-power devices such as the
TCC-80I. In most circumstances, termination resistors are used when the
RS-422/485 cable length is longer than 100 m. Regardless of how much
the data signal is dissipated, the termination resistors absorb more than
75 mW of power from the power source when TCC-80I is unable to use
the limited serial power. In other words, if long distance RS-422/485
transmission or termination is required, then an external USB power cord
or DC power supply should be used (in this case, DIP SW3 must be ON).
By testing the TCC-80I at different baudrates and transmission distances,
we have determined the maximum transmission distance that can be
achieved when using serial port power. The test results are shown in the
following table.
Baudrate (bps)
RS-422/485
Transmission
Distance (m)
Embedded
Terminator
External Power
Required
9600
1200
(ON) 120Ω
NO
19200
1200
(ON) 120Ω
NO
38400
600
(ON) 120Ω
NO
57600
300
(ON) 120Ω
NO
115200
150
(ON) 120Ω
NO

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Switch and Jumper Settings
To change the operation mode, check the DIP Switch settings on the back
panel.
DIP Switch Settings
RS-422 with
Terminator
SW1
SW2
SW3
OFF
OFF
ON
RS-422
SW1
SW2
SW3
OFF
OFF
OFF
4-wire RS-485 with
Terminator
SW1
SW2
SW3
ON
OFF
ON
4-wire RS-485
SW1
SW2
SW3
ON
OFF
OFF
2-wire RS-485 with
Terminator
SW1
SW2
SW3
ON
ON
ON
2-wire RS-485
SW1
SW2
SW3
ON
ON
OFF
DIP SW1 and SW2 are used to select the operation modes (RS-422, 4W or
2W RS-485). The termination is controlled by DIP SW3.
Ext. Power supply
If additional external power is required, TCC-80I is designed to be
connected to a standard 5 to 12 VDC power adapter.
RS-422/485 Pinouts
The RS-422/RS-485 port with Terminal Block Connector is shown below.
Note that some for some RS-422/485 devices, “B” is used in place of “+”
and “A” is used in place of “-“. That is, Data(B) Data(A) are equivalent to
Data (+) and Data(-), respectively.
PIN
RS-422/485
1
T+
2
T-
3
R+/D+
4
R-/D-
5
GND
RS-232 Pinouts
The female DB9 port for the RS-232 signal is shown in the following
figure.
PIN
RS-232
1
DCD
2
TxD
3
RxD
4
DSR
5
GND
6
DTR
7
CTS
8
RTS
shorted
shorted

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NOTE
The RTS and CTS pins are shorted, and the DTR, DSR, and DCD
pins are shorted, so that users do not need to worry about the
hardware flow control cable wiring problem.
USB Power Cord
If additional external power is required, the TCC-80I can be connected to
a standard 5 to 12 VDC power supply, or the USB power cord
(CBL-USBAP-50) can be used.
USB “A” Male Connector
TCC-80I USB Connector
Connector
Pinouts
PIN
Signals
1
+5 VDC
2
–
3
–
4
GND