Ai/Di Expansion Card - Huawei ECC500 User Manual

ECC500
User Manual
COM4/12V and COM5/12V ports: Pins 3 and 8 of these two ports provide 12 V DC power.
Therefore, before connecting equipment to the ports, check the equipment pin description to
ensure that pins of the equipment match those on the ports, preventing damage to ports or the
equipment.
The internal circuit design of the RS485 expansion card allows the RS485 ports to be
compatible with two-wire or four-wire cables, eliminating the need to cascade cables, as
shown in
Figure 3-5 Compatibility of the RS485 ports

3.2.4 AI/DI Expansion Card

The AI/DI expansion card provides four AI/DI input ports to connect monitoring sensors and
provide the DO control function.
expansion card.
Issue 03 (2020-01-06)
Figure 3-5.
Copyright © Huawei Technologies Co., Ltd.
Figure 3-6 shows ports on the front panel of the AI/DI
3 Configurations and Port
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