AC7 OPTO 22, AC7 Datasheet - Page 12

• 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

INSTALLATION
SETTING THE AC7A/B RS-232 JUMPERS
(FIRST GROUP - NEAR THE 25-PIN RS-232 CONNECTOR)
12 AC7A/B User’s Guide
This group of jumpers is located right next to the DB-25 connector on the AC7A/B. The first 6 pins of the group are
labeled PIN 2 OUT , PIN 3 IN , and PIN 2 IN , PIN 3 OUT . The rest are labeled by the letters A through H.
This group of jumpers determine which pin on the DB-25 connector is used for transmitting data as well as routing
options for other pins. Detailed information about this is covered later in this manual in “Additonal Technical
Information”.
If you are using a standard straight-through cable to connect the AC7A/B to your PC, then set these jumpers as
shown below:
If you are using a NULL modem cable to connect the AC7A/B to your PC, you will need different jumper settings.
See Figures 2-7 and 2-8 for more details on null modem cables. The jumper settings for a NULL modem cable
connecting an AC7A/B to a PC are shown on the next page:
Figure 2-9: Jumper Settings for Standard Straight-Through RS-232 Cable