AC7 OPTO 22, AC7 Datasheet - Page 17

• 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 (cont.)
Figure 3-1: AC7A/B Card Dimensions
CONNECTING AC POWER TO THE AC7A/B
Caution: Make sure that power is OFF while making or removing all connections to the AC7A/B and other
devices. For safety purposes, a plastic insulating cover is provided for the power terminal block and should be
installed after power wiring is completed.
The AC7A/B has a terminal strip with three screw terminals for AC power. The AC power that is supplied to the
AC7A/B should have three wires, two for AC power and one for earth ground (usually colored green). Connect the
wire for earth ground to the center screw terminal which is labeled GND. Connect the other two wires to the
terminals marked AC, one wire per terminal. The polarity of the AC power wires with respect to the AC screw
terminals on the power connector of the AC7A/B does not matter.
If using a standard, 3-conductor power cord with a three-pronged plug, it should be at least #18 gauge wires
or larger. On one end should be the three-pronged plug; the other should have three wires with approximately
1/4” (6mm) of insulation stripped off the end of each wire. Find the wire that corresponds to earth ground (usually
colored green) and connect this to the terminal labeled GND. You may determine the ground wire by using an
ohmmeter and testing for continuity with the ground pin on the plug. The other two wires should be connected to
the terminals marked AC, one wire per terminal. The polarity of the AC power wires with respect to the screw
terminals marked AC on the AC7A/B does not matter.
Figure 3-2: Connector Terminal
AC7A/B User’s Guide 17