Note For Fail-Safe Resistors For Com 1 In Rs-485 Mode; Note For Rs-485 Half Duplex (Only For Com 0 In Rs-485 Mode) - Eurotech ReliaGATE 10-12-6 Series User Manual

ReliaGATE 10-12 User manual Rev. 2-1
9.5.4

Note for fail-safe resistors for COM 1 in RS-485 mode

To insert the RS-485 fail-safe resistors, use the DIP switch available in the Service Panel.
9.5.4.1 Switches meaning
Default DIP switch configuration is OFF; this means no resistors inserted.
SW #
1
2
9.5.5

Note for RS-485 half duplex (only for COM 0 in RS-485 mode)

To set an RS-485 connection in Half Duplex, add the following external loop-back in the COM connector
(see "COM 0 and COM 1 connector specifications" on the next
pin 5.
Then: pins 1 and 4 are: D+ Line (A/Y); pins 2 and 5 are: D- Line (B/Z).
Signal
RS232_RX/485_D+ Line
RS232_TX/485_D- Line
Description
ON: 4.7 kΩ pull-up resistor inserted on COM 1
ON: 4.7 kΩ pull-down resistor inserted on COM 1
page): connect pin 1 to pin 4, and pin 2 to
9 Interfaces in detail
57 / 118