TCC-80/80I Series

Features and Benefits

External power source supported but not required
Compact size
Converts RS-422, and both 2-wire and 4-wire RS-485
RS-485 automatic data direction control
Automatic baudrate detection
Built-in 120-ohm termination resistors
2.5 kV isolation (for TCC-80I only)
LED port power indicator

Overview

The TCC-80/80I media converters provide complete signal conversion between RS-232 and RS-422/485, without requiring an external power source. The converters support both half-duplex 2-wire RS-485 and full-duplex 4-wire RS-422/485, either of which can be converted between RS-232’s TxD and RxD lines.

Automatic data direction control is provided for RS-485. In this case, the RS-485 driver is enabled automatically when the circuitry senses the TxD output from the RS-232 signal. This means that no programming effort is required to control the transmission direction of the RS-485 signal.

Port Power Over RS-232

The RS-232 port of the TCC-80/80I is a DB9 female socket that can connect directly to the host PC, with power drawn from the TxD line. Regardless of whether the signal is high or low, the TCC-80/80I can obtain enough power from the data line. However, external power can be used if the handshake line is not available, if the serial cable is too long, or if the RS-232 device is a low-power device. For external power, a five to twelve VDC power supply can be connected using an adapter or a USB power cord.

Port Power Dissipation

When installing a TCC-80 or TCC-80I converter, it is important to pay attention to power consumption, RS-232 cable length, and RS-422/485 transmission distance. In general, the TCC-80 and TCC-80I obtain 50 mW of power from the power source. Standard PC COM ports can provide 70 to 90 mW of power if the TxD, RTS, and DTR lines are connected. Moreover, the RS-232 cable should be shorter than 15 m (@ 9600 bps) to ensure that less power is lost from the host/device to the TCC-80. The remainder of the supplied power is used for transmitting the RS-422/485 signal.

Port Power and Optical Isolation

The RS-232 port of the TCC-80/80I is a DB9 female socket that can connect directly to the host PC, with power drawn from the TxD line. Electrical 2.5 kV isolation for the TCC-80I is achieved with a photo coupler that transforms the electrical signal into light, and then re-transforms the light back into an electrical signal on the other side. In this way, the two electrical circuits are completely isolated from each other. This also protects the devices from ground loop currents, reduces damage caused by data loss, and prevents damage to the communication interfaces.

LED Port Power Indicator

It’s easy enough to test the serial device with a multimeter to determine that the serial device will provide enough power to the media converter. However, it’s even easier to let the TCC-80I test the device for you. Simply connect the TCC-80I to the device’s RS-232 port and set the SW4 switch to Test mode. If the port power LED indicator lights up, the TCC-80I is receiving enough power. If the LED does not light up, you will need to attach an external power source to the TCC-80I.

Specifications

Serial Interface

Connector

TCC-80-DB9/80I-DB9: DB9 male
TCC-80/80I: Terminal block

No. of Ports

Serial Standards

RS-232
RS-422
RS-485

Isolation

TCC-80I/80I-DB9: 2 kV

RS-485 Data Direction Control

ADDC (automatic data direction control)

Terminator for RS-485

N/A, 120 ohms, 120 kilo-ohms

Baudrate

300 bps to 115.2 kbps

Serial Signals

RS-422

Tx+, Tx-, Rx+, Rx-, GND

RS-485-4w

Tx+, Tx-, Rx+, Rx-, GND

RS-485-2w

Data+, Data-, GND

RS-232

TxD, RxD, GND

Power Parameters

Input Current

TCC-80: 30 mA @ 5 to 12 VDC
TCC-80-DB9: 30 mA @ 5 to 12 VDC
TCC-80I: 20 mA @ 5 to 12 VDC
TCC-80I-DB9: 20 mA @ 5 to 12 VDC

Input Voltage

5 to 12 VDC

No. of Power Inputs

Overload Current Protection

Supported

Source of Input Power

Power input jack

Physical Characteristic

Housing

Plastic top cover
metal bottom plate

IP Rating

IP30

Dimensions

TCC-80/80I: 42 x 80 x 22 mm (1.65 x 3.15 x 0.87 in)
TCC-80-DB9/80I-DB9: 42 x 91 x 23.6 mm (1.65 x 3.58 x 0.93 in)

Weight

50 g (0.11 lb)

Installation

Desktop

Environmental Limits

Operating Temperature

0 to 60°C (32 to 140°F)

Storage Temperature (package included)

-20 to 75°C (-4 to 167°F)

Ambient Relative Humidity

5 to 95% (non-condensing)

Standard and Certifications

EMC

EN 55032/35

EMI

CISPR 32, FCC Part 15B Class A

EMS

IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-5 Surge: Power: 1 kV
IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
IEC 61000-4-8 PFMF

Environmental Testing

IEC 60068-2-1
IEC 60068-2-3

Safety

UL 60950-1

Vibration

IEC 60068-2-6

MTBF

Time

2,781,161 hrs

Standards

Telcordia (Bellcore)
GB

Warranty

Warranty Period

5 years

Models