505, 8
th
Avenue, 10
th
Floor, New York, NY 10018. Tel: 212-9910090 email: support@zk-usa.com
10. Improper wiring may cause the S900’s main circuit board and fingerprint
sensor to burn out. Resulting damage from
improper wiring is not covered under manufacturer’s warranty.
11. Only use supplied transformer and cord. Do not attempt extending the
cord by cutting and splicing.
12. If using RS485 mode of communication, use only a ZK
Software-supplied RS485 converters. Using a 3
rd
party RS485
converter may or may not work. If the RS485 cable length exceeds 200
feet, we recommend using a 120Ώ terminator.
13. Refer to the user handbook and operating instructions for further
information.
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