Idemia MorphoWave Compact - RS-485 Communication; RS-485 Wiring and Configuration

IDEMIA DOCUMENT – REPRODUCTION AND DISCLOSURE PROHIBITED
RS-485 Communication
12
IMPORTANT:
 A maximum of 31 devices may be installed on the same line.
 The maximum total cable length is 4000 ft. (1200m).
 The cable must be dedicated to this installation and not used for any other purpose
Step three : communications
RS-232
from the
Com Port
RS-232 to
RS-485
converter
RS-485 to
1200m (4000ft)
For RS-485 installations, the cable should be run in a daisy-
chain configuration (i.e. converter > position 1 > position 2 >
position 3, etc.).
Use CAT-5 UTP (or better) cable (shielded recommended) with a characteristic impedance of 120 ohms.
AWG 24 should be the minimum wire gauge used.
Choose one twisted pair of conductors to use for RS485_TX_Y (TX+, Green / Black wire - 10) and RS485_TX_Z (TX-, Green
/ White wire - 8). Another conductor should be used for Signal Ground (Black / Red wire - 11).
Choose a RS-232 to RS-485 converter that supports Sense
Data to switch from Send to Receive mode.
IDEMIA - 2018_2000035854 – V1
8
RS485_TX_Z (
-)
Green / White
10
RS
485_TX_Y (+)
Green / Black
11
RS
485_GND
Black / Red