AC7 OPTO 22, AC7 Datasheet - Page 5

• Manufacturer Part Number: AC7
• Description: Computers, Interface Cards
• Manufacturer: OPTO 22

Specifications of AC7

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Features: RS232 To RS422 Converter
• Interface: RS-422⁄485
• Module Type: Adapter Card
• Mounting Type: Protective Enclosure
• Voltage, Supply: 115 VAC ± 10 VAC @ 50⁄60 Hz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

INTRODUCTION
DESCRIPTION
FEATURES
The AC7A/B is an external, standalone, adapter card which converts RS-232 serial communication to RS-422/485
serial communication. The AC7A/B has optical isolation between its RS-232 port and its RS-422/485 port, with full
transient protection on the RS-422/485 lines. The AC7A/B is an open chassis circuit board, and is designed to be
mounted inside a protective enclosure (protective enclosure not included.) The converter operates as a full duplex
device with transmission speeds up to 38,400 baud for distances up to 5,000 feet using two twisted pairs and a
signal ground wire. Revision L and newer AC7A/B’s can operate at up to 115,200 baud. The maximum distance for
115,200 baud rate is 3,000 feet.
Note: See the solder (non-component) side of the circuit board for the revision number. An example is “001782L”
•
•
•
•
•
•
•
•
•
•
RS-422/485 balanced line drivers.
Multidrop capability on the RS-422/485 communication lines.
Baud rates up to 38,400 baud (up to 115,200 baud for revision L and more current).
Up to 5,000 feet maximum cable length at 38,400 baud (3,000 feet maximum cable length at 115,200 baud).
Bi-directional CTS and RTS handshaking lines.
Optically-isolated up to 4,000 volts between the RS-232 and RS-422/485 lines.
RS-422/485 lines have transient protection.
LED indicators for transmit, receive, RTS, CTS, and power.
On-board power supply.
Jumper configurable termination and biasing for RS-422/485 lines.
where “L” is the revision letter.
AC7A/B User’s Guide 5
INTRODUCTION