1. turn off the host system.
2. connect the powerlink cable to the 10-pin rs232/light pen interface jack. it is the 1↑st round opening from the left side of the ms7320 (see figure 5).
3. connect the other end of the powerlink cable to the host.
before continuing verify that the powerlink cable is connected to the appropriate interface jack on the scanner. an incorrect cable connection can cause communication problems or potential damage to the scanner.
4. connect the external power supply to the power jack on the powerlink cable.
5. check the ac input requirements of the power supply to make sure the voltage matches the ac outlet.
6. connect ac power to the transformer. the outlet should be near the equipment and easily accessible.
7. scan the appropriate bar codes on page 9 to configure the ms7320 for rs-232 or light pen communication.
8. turn on the host system.
9. snap on the cable cover.

figure 5: rs232 or light pen interface
1、to maintain compliance with applicable standards, all circuits connected to the scanner must meet the requirements for selv (safety extra low voltage) according to en 60950.
2、to maintain compliance with standard csa c22.2 no. 60950-00/ul 60950 and norm en 60950, the power source should meet applicable performance requirements for a limited power source.
codes needed for step 7 on page 8.
for rs232 communication:

for light pen communication: