SmartLogger1000
User Manual
4 Electrical Connections
Issue 12 (2019-01-15)
Copyright © Huawei Technologies Co., Ltd.
37
Figure 4-16
COM ports on the SmartLogger
Table 4-6
COM port description
Port
Identifier
Function
COM1 port
NC
Reserved
NC
Reserved
-
RS485B, for RS485 negative
differential signaling
+
RS485A, for RS485 positive
differential signaling
COM2 port
-
RS485B, for RS485 negative
differential signaling
+
RS485A, for RS485 positive
differential signaling
COM3 port
-
RS485B, for RS485 negative
differential signaling
+
RS485A, for RS485 positive
differential signaling
SUN2000L-4.125KTL-JP/4.95KTL-JP connects to the SmartLogger through the bottom
COM port.