ABB NETA-21 Installation And Startup Manual page 5

1 X1 10...30 V DC – power supply input
2 X2 EIA-232 port
• 9-pin D-sub male type connector X2
• EIA-232 level interface for a modem
3 X3 EIA-485 port
• 4-pin detachable screw type connector X3
• EIA-485 level interface for a Modbus network
4 Termination jumpers for the link connected to X3
5 X11 AC/DC 24V – secondary power supply input
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3
2
1
NETA-21 remote monitoring tool 5
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