User guide Automatic Transfer Switch
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User guide Automatic Transfer Switch
7 Communication Port
The ATS is supplied with the following communication ports:
• Serial port is available with RS232 com. port and USB com. port on the front panel.
PLEASE NOTE
the use of one port automatically excludes the other.
• Contacts port on the rear panel.
Serial Ports: RS-232 & USB connectors
Put the input power switch in “ON” position. The output will then be supplied by the source set as selected.
PIN#
Name
Type
Signal
1
2
TX
OUT
Serial line TX
3
RX
IN
Serial line RX
4
5
GND
POWER
6
+12V
POWER
7
8
9
PIN#
Signal
1
VBUS
2
D-
3
D+
4
GND
RS-232 connector
USB connector
PLEASE NOTE
The utilization of the communication port is optional and it is not necessary for the correct
functioning of the ATS.
Contact Ports
The contacts port is formed using six (6) pins numbered from left to right (see fig. 1), which can be connected
to an external monitoring system (such as a BMS) in order to monitor the operational status of the ATS.
The external equipment must respect the voltage and current characteristics of contacts port.
Focus on contacts port
The contacts port provides the following pins:
• Pin 1: common contact.
• Pin 2: “Source B” active contact
(if the contact between “pin 1” and “pin 2” is closed, output is supplied by “Source B”).
• Pin 3: “Source A” active contact
(if the contact between “pin 3” and “pin 1” is closed, output is supplied by “Source A”).
• Pin 4: “Source A” status OK contact
(if the contact between “pin 4” and “pin 1” is closed, “Source A” is present and regular).
• Pin 5: “Source B” status OK contact
(if the contact between “pin 5” and “pin 1” is closed, “Source B” is present and regular).
• Pin 6: Status OK contact
(if the contact between “pin 6” and “pin 1” is closed, ATS functioning status is regular).
The following diagram shows the functioning of the contacts port.
Contacts port basic diagram
ATTENTION
The pins of the contact port are able to carry maximum current of 8A and maximum voltage of 250Vac.
