OPTO 22 AC7A Operation & User’s Manual

12, OPTO 22 AC7A AC7A/B User’s Guide 11 Figure 2-7: 25-Pin to 25-Pin Null Modem Cable Diagram Figure 2-8: 9-Pin to 25-Pin Null Modem Cable Diagram To determine whether you have a null-modem or standard cable, perform the following tests: If you have a cable with 25-pin connectors at both …

19, 18 AC7A/B User’s Guide CONNECTING THE AC7A/B TO A PC OR OTHER RS-232 DEVICE A standard RS-232 serial cable may be used to connect the AC7A/B adapter card to the PC. One end of the RS-232 cable must have a male 25-pin (DB-25) connector for the AC7A/B. The other end of the cable is…

30, AC7A/B User’s Guide 29 Second, install the three sets of jumpers on the AC7A/B as shown below. The shaded areas indicate where jumpers need to be placed. Figure 4-3: Three Sets of AC7A/B Jumpers Finally, connect FO+ to TO+, and FO- to TO- on the AC7A/B as shown below. …

7, 6 AC7A/B User’s Guide SPECIFICATIONS Power Requirements AC7A AC7B 115 VAC ± 10 VAC @ 50-60 Hz 220 VAC ± 20 VAC @ 50-60 Hz Power Consumption 0.1 amps @ 115 VAC 5 watts (dissipation) Operating Temperature Range 0° C to 70° C 0 to 95% humidity (non-condensing) Optical Isolation 4…

5, 4 AC7A/B User’s Guide WELCOME WELCOME OVERVIEW Opto 22’s 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 t…