User's Manual

Page 150 FRH-SD07TU/TB Manual
8.2.3 RS485 Level Conve rte r
Wire the terminator of the RS485 bus (100 ohm), the input pull-up (1k ohm) and the inp
pull-down (1k ohm), when necessary.
When long RS485 line is used or ther
ut
e is much noise, provide the surge absorber (e.g. Z2012
made by Ishizuka Denshi) according to the situation.
Figure B–3: RS485 Level Conversion Circuit
8.3 Spec ification of the Connect ors
(1) Serial Communication connector
Connector: MOLEX 53780-1490 (14 pins)
Mating Plug: MOLEX 51146-1400
(2) Antenna connector
RF connector: HIROSE U.FL-R-SMT
The antenna connector is guaranteed for 30 times of plugging in/out.
When plugging out the antenna connector, use the specially prepared
tool of E.FL-LP-N, provided by HIROSE (HIROSE Product No.
CL331-0441-9).
Rev. 050415-01.1