Moxa Technologies Transio TCC-80I User manual

Isolated High-Speed Serial Port Powered
Serial Media Conversion Solution
Transio TCC-80I User’s Manual P/N: 1802000801000 First Edition.
www.moxa.com ©2006 MOXA Technologies.
MOXA Technologies Co., Ltd. All rights reserved.
RS-422/485 Connection
The RS-422/485 port to terminal block connector is
shown below. Note that some RS-422/485 devices
are labeled “+” and “-” and some are labeled “B”
and “A”. In other words, Data (B) is equivalent to
Data (+) and Data (A) is equivalent to Data(-).
RS-422/4w RS-485 2w RS-485
T+
T.
R+/D+
R./D.
GND
R+
R.
T+
T.
GND
T+
T.
R+/D+
R./D.
GND
D+
D.
GND
RS-232 Pinouts
The female DB9 port for the RS-232 signal is
shown in the following figure.
54321
968 7
PIN RS-232
1 DCD
2 TxD
3 RxD
4 DSR
5 GND
6 DTR
7 CTS
8 RTS
Note: As shown above, RTS and CTS are
shorted, and DTR, DSR, DCD are shorted.
This frees users from the hardware flow
control cable wiring problem.
USB Power Cord
If additional external power is required, TCC-80I
can be connected to a standard 5 to 12 VDC power
supply or the USB power cord CBL-USBAP-50.
USB “A” Male Connector
Front:
4 3 2 1
Top:
TCC-80I
USB Connector
Connector Pinouts Signals
1 +5 VDC
2 --
3 --
4 GND
TCC-80 I
inner
outer
DC Power Plug
CBL-USBAP-50
USB USB Host
A Type Female
+5 VDC
GND
Cable Wiring
1
4
5-12 VDC
20 mA (max.)
Ø2.1±0.1
Ø5.1±0.1
Transio TCC-80I
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 Surge
Protection.
Overview
The TCC-80I is the world’s first high-speed,
isolated, self-powered converter. It is powered via
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’s built-in 15 KV ESD surge protector
provides the output ports with comprehensive
protection against surges and spikes. 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
•USB Power Cord
•User’s Manual
Applications
•Multipoint data acquisition
•Factory automation
•Remote serial device control
•Building security automation
•Critical industrial control
Features and Specifications
•Signals:
RS-232: TxD, RxD and GND
RS-422: TxD+(B) / -(A),
RxD+(B) / -(A), GND
RS-485: Data+(B) / -(A), GND
•Port types: RS-232: Female DB9
RS-422/485: Terminal Block
•Supports baudrate up to 115.2 Kbps
•RS-232 loopback: RTS to CTS; DTR to DSR
and also DCD
•Supports automatic RS-485 data direction
control with no baudrate switch settings
•15 KV ESD for all RS-232/422/485 signals
•2.5KV Optical 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 and DTR
(RTS/DTR ON are recommended)
•LED Port Power Indicator (switch settings)
•Ext. Power (jack): DC +5V to +12V adapters or
a USB power cord (DC +5V)
•Operating temperature: 0 to 60°C
(32 to 140°F)
•Dimensions: 42 ×80 ×22 mm
•Case: ABS + PC
•Weight: 50 ± 5 g
•CE, FCC Class B approval
•Power Consumption: 20 mAat +5 VDC
(termination disabled)
•Warranty: 2 years
shorted
shorted

Transio TCC-80I User’s Manual Transio TCC-80I User’s Manual
Installation
Serial (RS-232) Port Power
The RS-232 port of the TCC-80I is designed with a
female DB9 socket to connect directly to the host
PC, with power drawn from the TxD, RTS, and
DTR lines. Although the TCC-80I is able to obtain
enough power from the combination of the three
data/handshake lines, regardless of whether the
signal is high or low, it is highly recommended to
activate the “ON” signal for either the RTS or DTR
lines. For those applications that do not use the
handshake lines, a DC jack is provided for
connecting a 5 to 12 VDC power supply via a USB
power cord or external power adaptor.
TXD
RTS
DTR
Serial Power Source/Data
±5 to ±12 VDC Signal
RS-422/485
Devices
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, the TCC-80I itself gets 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. The rest of the
supplied power is used for transmitting the
RS-422/485 signal.
.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
when their RTS/DTR is connected and in the “ON”
state.
Multiport Serial Boards Serial Device Servers
MOXA Smartio
CP-118U
CP-168U V2
CP-104U V2
CP-102U
MOXA NPort
5110/5210 V2.1
5410 V2.2
5610 V3.0 (or later)
MOXA Smartio
CP-118EL Series
CP-168EL Series
CP-104EL Series
MOXA USB
NPort U1110
MOXA USB to Serial
UPort 1410/1610
LED Port Power Indicator
The best way to ensure that the attached serial port
provides enough electricity to the TCC-80I is to
check the power indicator LED on 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 to Test mode. If the LED lights up, the
TCC-80I is receiving enough power. 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.
Test
Mode
SW4
Std.
Mode
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 dissipates, the termination
resistors absorb more than 75 mW of power from
the power source when the 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.
TXD
Data
RS-422/485
Devices
USB Port Power Cord
Long Range/
Terminated
RS-422/485
Connection
TXD
RTS
DTR
5 to 12 VDC Ext. Power Adaptor
Data
By testing the TCC-80I at different baudrates and
transmission distances, we have determined the
maximum transmission distances that can be
achieved when using serial port power. The test
results are shown in the following table.
Port Powered Transmission Distance
Baudrate
(bps)
RS-422/485
Transmit
Distance (m)
Embedded
Terminator Ext. Power Required
9600 1200 (ON) 120ΩNO
19200 1200 (ON) 120ΩNO
38400 600 (ON) 120ΩNO
57600 300 (ON) 120ΩNO
115200 150 (ON) 120ΩNO
Switch and Jumper Settings
To change the operation mode, check the DIP
Switch settings on the back panel.
123
ON
DIP Switch Settings
SW1 SW2 SW3
RS-422 OFF OFF OFF
SW1 SW2 SW3
RS-422 with
Terminator OFF OFF ON
SW1 SW2 SW3
4-wire RS-485 ON OFF OFF
SW1 SW2 SW3
4-wire RS-485 with
Terminator ON OFF ON
SW1 SW2 SW3
2-wire RS-485 ON ON OFF
SW1 SW2 SW3
2-wire RS-485 with
Terminator ON ON ON
DIP Switches SW1 and SW2 are used to select the
operation modes (RS-422, 4W RS-485, or 2W
RS-485). Termination is controlled by DIP Switch
SW3.
Ext. Power Supply
The TCC-80I is designed to be connected to a
standard 5 to 12 VDC power adapter if additional
external power is required.