Installation; Cable Connection And Routing Rules - Huawei UPS5000 User Manual

UPS5000 Backfeed Protection Card
User Manual (03021KQQ)

3.3 Installation

The backfeed protection card supports hot swap. You can install it when the UPS is running,
but you must wear insulation gloves.

3.3.1 Cable Connection and Routing Rules

The backfeed protection card uses relay contact signals and it can connect to any power signal
with a voltage of 240 V AC or less and a current of 4 A or less.
Figure 3-1
Figure 3-1 Front view of a backfeed protection card
Figure 3-2
Figure 3-2 Ports on the backfeed protection card
Table 3-2 Port description
Port Position
MFP (mains
feedback
protection)
Issue 05 (2017-04-28)
shows the front view of a backfeed protection card.
shows the ports on the backfeed protection card, and
Silk Screen
MFP_NO
MFP_COM
MFP_NC
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Table 3-2
Description
The MFP ports are the signal ports for the mains
backfeed protection. NO and COM are normally
open contacts. NC and COM are normally closed
contacts. When a backfeed occurs, the normally
open contacts are closed and the normally closed
contacts are open.
3 Product Installation
describes the ports.
4