Chapter 5: Communication Interfaces - Delta Amplon RT Series User Manual

Chapter 5 : Communication Interfaces
NOTE:
1. The UPS can still function properly without making the connections below.
2. For the location of the communication interfaces, please refer to Figure 4-1-1 and
Figure 4-1-2.
3. The maximum length allowed for the signal/ communication cables is 30 m (9.84 ft).
5.1 Mini Slot
The Mini slot is for installation of an optional mini card. You can install the optional Mini SNMP IPv6
card for network communication, Mini Relay I/O card for dry contact expansion, or Mini MODBUS
card for MODBUS communication.
5.2 RS-485 Port
The port is for communication with lithium-ion batteries (baud rate: 57600); you can check and
monitor the status of lithium-ion batteries and update the firmware.
 RS-485 Pins
PIN 3: Negative CHG OFF
When your external battery setup is 'Standard Battery Pack' – 'Li-ion Battery', PIN 6 and
PIN 3 can detect the battery connection.
When your external battery setup is 'Customer Own Batt. Pack' – 'Others', PIN 6 and PIN
3 can receive the CHG OFF signal from the external battery pack and disable charging;
effective when PIN6 and PIN2 or PIN3 and PIN2 are shorted.
PIN 4: Battery Fault
When your external battery setup is 'Customer Own Batt. Pack' – 'Others', PIN 4 can
receive a battery error signal; effective when PIN4 and PIN2 are shorted.
(Figure 5-1: Pin Location of RS-485 Port)
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