Cable Connection/ 连接线缆
A. Cable Connection/ 连接线缆
Connect the alarm cable and RS485 cable. It is recommended that twisted pair cables be used as alarm cables.
The diameter of the cable core ranges from 22 AWG to 28 AWG. The impedance of the entire cable is less
than or equal to 100 ohms.
连接告警线缆、RS485 线缆。告警线缆建议使用双绞线，线芯的线径为 22AWG ～ 28AWG，整条线路的阻抗≤ 100Ω。
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Cover the rest of the cabling in a conduit or with
protective waterproof rubber tape. Make a drip loop
as shown below to create an artificial lowest point of
the cable.
使用防护皮管或者防水胶带，包住线缆其他部分，并制作
滴水弯。滴水弯呈倒 Ω 型，形成线缆的最低点。
Insulation tape
绝缘胶带
Cable tie
扎线带
Waterproof and insulate all cables including power cables, network cables, and unused pigtails.
Before that, check the cabling and ensure that the camera runs normally to avoid reworkings.
The waterproof tape must cover the cable bundle from the insulation sheath all the way to the cable conduit (for
example, a PVC tube). The tape must be wrapped tightly and there must be no gaps in the coverage or water will
leak in.
电源线、网线等所有的线缆，包括未使用的尾线都需要做防水绝缘处理。
做绝缘防水处理前请检查线缆是否接好并可正常工作，避免二次返工。
防水胶带务必从线缆束绝缘外皮开始缠绕至防护皮管（如 PVC 管），且尽量缠紧，且覆盖到位，以免漏水。
NOTE/ 说明
Drip loop
滴水弯
B. Waterproofing and Insulation/ 防水绝缘处理
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Wrap one layer of insulation tape around each
cable joint.
用绝缘胶带缠绕每条线缆对接处，缠绕一层。
Stretch the waterproofing tape evenly to twice its
original length. Then apply it for three layers from
bottom to top, from top to bottom, and from bottom
to top again.
均匀拉伸防水胶带，使其长度为原长度的 2 倍。再采用由
下至上，由上至下，再由下至上的处理方式缠绕三层。
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Insulation tape
绝缘胶带
Waterproof tape
防水胶带
Waterproof tape
防水胶带
Apply three layers of insulation tape. Then, use
cable ties to secure the both ends.
用绝缘胶带缠绕三层。最后用扎线带绑扎上下两端。
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Supplier’s Declaration of Conformity (SDoC)
Unique Identifier:
trade name:
HUAWEI
; product name:
Network camera
; model number:
C2120-I&C2141-I&C2121-I
Responsible Party- U.S. Contact Information
Huawei Technologies USA Inc.
5700 Tennyson Parkway, Suite 500
Plano, Texas 75024
Main: 214-919-6000 / TAC Hotline: 877-448-2934
FCC Compliance Statement ( for products subject to Part 15)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
