ABB ABILITY
TM
EDGE INDUSTRIAL GATEWAY
39
6
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6.3 COM ports
The ABB Ability™ Edge Industrial Gateway provides the following COM ports:
• 1x RS-485: COM 0; Surge protected, Insulated, Half Duplex.
• 1x RS-232/485: COM 1; Surge protected, RS-485 termination and fail-safe resistors (Default: RS-232).
COM ports specifications:
• The COM ports are surge protected.
• Maximum supported baud rates are:
• For RS-232 mode: up to 450 kbps.
• For RS-485 mode: up to 1.75 Mbps.
The COM connectors are available on the front side.
6.3.1 Note for termination resistors for COM 1 in RS-485 mode
COM 1 has 2 pairs of pins (each signal is doubled):
• If the ABB Ability™ Edge Industrial Gateway is located at the beginning, or at the end, of a RS-485 chain,
requires that.
• If the ABB Ability™ Edge Industrial Gateway is not at the beginning or at end of the RS-485 chain, two
options are available:
• Option 1: one pair of pins can remain not connected.
• 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.
6.3.2 Note for fail-safe resistors for COM 0 in RS-485 mode
6.3.3 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.
Switches meaning
Default DIP switch configuration is OFF; this means no resistors inserted.
SW # Signal Description
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Figure 10
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