Eurotech DynaGate 10-12 Series, User Manual

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8 Interfaces in detail DynaGATE 10-12 User manual Rev. 0-14
8.7 COM ports 0 and 1 for DynaGATE 10-12-XY with X ≥ 4
The DynaGATE 10-12 provides the following COM ports:
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1x RS-422/485: COM 0; Surge protected, Insulated, Full Duplex / Half Duplex
(Default: RS-422 Full Duplex)
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1x RS-232/485: COM 1; Surge protected, RS-485 termination and fail-safe resistors
(Default: RS-232)
COM ports specifications:
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The COM ports are surge protected
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Both COM ports are disabled when the ReliaGATE is initially powered ON
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To set the RS-232/485 modes see "How to set the RS-232/485 modes" on page 69
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Maximum supported baud rates are:
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For RS-232 mode: up to 450 kbps
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For RS-485 mode: up to 1.75 Mbps
The COM 0/1 connectors are available on the front side.
For further information, see: "COM ports 0 and 1, Console port " on page 69
8.7.1 Note for termination resistors (only for COM 1 in RS-485 mode)
COM 1 has 2 pairs of pins (each signal is doubled):
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If the DynaGATE 10-12 is located at the beginning, or at the end, of a RS-485 chain, spare pair of
pins can be used to connect permanently standard axial resistor 120 Ohm, if the application
requires that
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If the DynaGATE 10-12 is not at the beginning or at end of the RS-485 chain, two options are
available:
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Option 1: one pair of pins can remain not connected
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Option 2: one pair of pins can be used to connect the previous device of the chain,
and the other pair can be used to connect the following device of the chain
8.7.2 Note for fail safe resistors (only for COM 1 for RS-485 mode)
To insert the RS-485 fail-safe resistors, use the DIP switch available in the Service Panel.
8.7.2.1 Switches meaning
Default DIP switch configuration is OFF; this means no resistors inserted.
SW # Signal Description
1 RS232_RX/485_D+ Line ON: 4.7 kΩ pull-up resistor inserted on COM 1
2 RS232_TX/485_D- Line ON: 4.7 kΩ pull-down resistor inserted on COM 1
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