Datasheet

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TCC-80/80I Series

Port-powered RS-232 to RS-422/485 converters with optional 2.5 kV isolation

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

Certifications

Introduction

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.

Summary of content (5 pages)

PAGE 1
TCC-80/80I Series Port-powered RS-232 to RS-422/485 converters with optional 2.5 kV isolation 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.
PAGE 2
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 retransforms the light back into an electrical signal on the other side. In this way, the two electrical circuits are completely isolated from each other.
PAGE 3
Power Consumption TCC-80/80-DB9: 30 mA @ 5 to 12 VDC TCC-80I/80I-DB9: 20 mA @ 5 to 12 VDC Source of Input Power Power input jack Physical Characteristics 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.
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Dimensions TCC-80 TCC-80I 4 www.moxa.
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TCC-80-DB9, TCC-80I-DB9 Ordering Information Model Name Isolation Serial Connector TCC-80 – Terminal Block TCC-80I ✓ Terminal Block TCC-80-DB9 – DB9 TCC-80I-DB9 ✓ DB9 Accessories (sold separately) Cables CBL-USBAP-50 USB A male/2.1 mm DC Jack cable, 50 cm Connectors ADP-RJ458P-DB9F DB9 female to RJ45 connector Mini DB9F-to-TB DB9 female to terminal block connector Power Adapters PWR-12050-WPUSJP-S2 Non-locking barrel plug, 12 VDC, 0.