Transcript
Serial Port Powered Media Conversion Solution
RS-422/RS-485 Pinouts
USB “A” Male Connector
The RS-422/RS-485 port with terminal block connector is shown below. Note that some RS-422/485 devices “B” instead of “+” and use “A” instead of “-”. That is, Data (B) equals Data (+), and Data (A) equals Data (-).
Front:
Transio TCC-80 V2.2 / TCC-80-DB9 V1.0
Top:
Self-powered RS-232 to RS-422, 2-wire/4-wire RS-485 bi-directional converter with 15 KV ESD protection
4321
TCC-80 USB Connector Connector Pinouts
T+ T R+/D+ R /D GND
1 2 3 4
+5 VDC --GND
DC Power Plug
1 2 3 4 5
Overview Signals
USB
TCC-80
USB Host A Type Female
CBL-USBAP-50 6 7 8 9
Cable Wiring
1
T+
2
T-
3
R+/D+
4
R-/D-
5
GND
inner outer
5.1–0.1
RS-422/485
1 4
+5 VDC GND
2.1–0.1
PIN
The TCC-80, which is powered by the RS-232 port, provides complete signal conversion between RS-232 and RS-422/485 devices. The TCC-80 converts back and forth between RS-232’s TxD and RxD lines, and either half duplex RS-485 or the balanced signal of full duplex 4-wire RS-422/485. In addition, the TCC-80 provides comprehensive 15 KV ESD protection for all serial lines. The TCC-80 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 is not required to control the transmission direction of the half duplex RS-485 signal.
12 VDC 10 mA (max.)
USB Power Cord The TCC-80 can be connected to a standard 5 to 12 VDC power supply, or you may use the USB Power Cord CBL-USBAP-50 if additional external power is required.
Package Checklist
Applications • • • • •
Multipoint data acquisition Factory automation Remote serial device control Building security automation Critical industrial control
Features and Specifications • Serial interfaces: RS-232, RS-422, and 2-wire/4-wire RS-485. • Port types: Female DB9 for RS-232; Terminal Block for RS-422/485 • Compact size. • Auto senses baudrates up to 115.2 Kbps. • Signals: RS-232: TxD, RxD, GND RS-422: TxD+ (B)/-(A), RxD+ (B)/-(A), GND RS-485: Data+ (B)/-(A), GND • RS-232 loopback: RTS to CTS, and DTR to DSR and DCD. • Supports automatic RS-485 data direction control with no baudrate switch settings for RS-485. • 15 KV ESD protection for all RS-232/422/485 signals. • 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. • External Power (jack): DC +5V to +12V adaptors 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: 10 mA at +5 VDC (termination disabled). • Warranty: 5 years.
• TCC-80 or TCC-80-DB9 • USB Power Cord • User’s Manual
Transio TCC-80/80-DB9 User’s Manual www.moxa.com Moxa Inc.
P/N: 1802000800011
Third Edition. ©2008 Moxa Inc. All rights reserved.
Installation
Optional External Power
RS-232 Serial Port Power
Termination is a critical requirement for port-power devices such as the TCC-80. 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-80 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).
The RS-232 port of the TCC-80 is designed with a female DB9 socket for connecting directly to the host PC, with power drawn from the TxD, RTS, or DTR lines. Regardless of whether the signal is high or low, the TCC-80 is still able to obtain enough power from the three data/handshake lines. For applications that do not use the handshake lines, a DC jack is provided for connecting a 5 to 12 VDC power supply through a USB power cord or external power adaptor.
RS-232 Pinouts
Moxa Boards CP-168U Series CP-104U Series CP-102U Series C168H Series C104H Series
The female DB9 port for the RS-232 signal is shown in the following figure.
Moxa NPort Servers CN2510 CN2610 NPort 5110 NPort 5210 NPort 5410 NPort 5610 NPort 6150 NPort 6250 NPort 6450 NPort 6650
5 4 3 21
9876
Switch and Jumper Settings
Data TXD
TXD RTS DTR
Multiport Serial Boards Serial Device Servers
Long Range/ Teminated RS-422/485 Connectiion
RS-422/485 Devices
Serial Power Source / Data
To change the operation mode, check the back panel for the DIP Switch settings, as shown below: ON
USB Port Power Cord
Port Power Dissipation
RTS
Long Range/ Teminated RS-422/485 Connectiion
DTR
5 to 12 VDC Ext. Power Adaptor
Baud rate (bps)
RS-422/485 Transmit Distance (m)
Embedded Terminator
RTS/DTR or Ext. Power Required
9600 19200 38400 57600 115200
1200 1200 600 300 150
(ON) 120 Ω (ON) 120 Ω (ON) 120 Ω (ON) 120 Ω (ON) 120 Ω
NO NO NO NO NO
Serial Port Power Compatibility Different kinds of serial ports use different interface chips, and provide different power levels. In fact, some ports will not provide enough power to activate the TCC-80. You will seldom encounter problems with a PC’s onboard COM1 and COM2 ports. Refer to the following table for add-on cards and serial-to-Ethernet device server that are guaranteed to provide sufficient power.
Transio TCC-80/80-DB9 User’s Manual
RS-232
1
DCD
2
TxD
3
RxD
4
DSR
5
GND
6
DTR
7
CTS
8
RTS
shorted
shorted
1 2 3
Data TXD
When installing an RS-232 port-powered TCC-80 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-80 itself derives 50 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 when making the trip from the host/device to the TCC-80. The rest of the supplied power is used for transmitting the RS-422/485 signal.
PIN
DIP Switch Settings RS-422 with SW1 SW2 SW3 Terminator OFF OFF ON SW1 SW2 SW3 RS-422 OFF OFF OFF 4-wire RS-485 with SW1 SW2 SW3 Terminator ON OFF ON SW1 SW2 SW3 4-wire RS-485 ON OFF OFF 2-wire RS-485 with SW1 SW2 SW3 Terminator ON ON ON SW1 SW2 SW3 2-wire RS-485 ON ON OFF DIP switches SW1 and SW2 are used to select the operation modes (RS-422, or 4W or 2W RS-485). The termination is controlled by DIP switch SW3.
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 hardware flow control cable wiring.
External Power Supply The TCC-80 can be connected to a standard 5 to 12 VDC power adaptor if additional external power is required.
Transio TCC-80/80-DB9 User’s Manual
