Alpha ATS-216 - Page 6

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3.3.4. Interface
The ATS provides three communication ports and one external
communication slot (optional) for the user.
Standard communication ports: RS-232, USB, and 5 dry contacts
External communication slot: SNMP, RS-485
3.3.4.1. RS-232
3.3.4.2. USB
Pin Definition
Type Signal
1 N/A N/A N/A
2 TX Output TX
3 RX Input RX
4 N/A N/A N/A
5 GND
Power
source
N/A
6 +12V
Power
source
N/A
7 N/A N/A N/A
8 N/A N/A N/A
9 N/A N/A N/A
Pin Signal
1 VBUS
2 D-
3 D+
4 GND
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3.3.4.3. Dry Contact
The ATS provides five user configurable dry contacts for customized
features. The capacity of each contact is 24Vdc/1A, additional information is
provided in Appendix A.
Pin
Definition Signal (default)
1 Common 3 N/A
2 Relay 3
System Alarm
3 Relay 4
Overload
4 Common N/A
5 Relay 5
Over temperature
6 Common 1 N/A
7 Relay 1
Source A abnormal
8 Common 2 N/A
9 Relay 2
Source B abnormal