TX Matrix Plus Chassis Grounding Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the TX Matrix Plus router must be adequately grounded before power is connected. To ground the TX Matrix Plus router, connect a grounding cable to earth ground and then attach it to the chassis grounding points using two screws.
Two pairs of threaded inserts (PEM nuts) are provided on the right rear of the chassis for connecting the TX Matrix Plus router to earth ground. The bottom pair of grounding points fits M6 screws (European), and the top pair fits UNC 1/4–20 screws (American). The grounding points are spaced at 0.625-in. (15.86-mm) centers.
The accessory box shipped with the TX Matrix Plus router includes two UNC 1/4–20 screws used to secure the grounding cable to the right pair of grounding points and the cable lug that attaches to the grounding cable (see Figure 1). (The cable lug shown in Figure 1 is also used for the DC power cables.)
Figure 1: Grounding Cable Lug
The grounding cable must meet the requirements in Table 1.The grounding cable must be able to handle up to 60 A @ –48 VDC.
Table 1: Grounding Cable Specifications
Cable Type | Quantity and Specification | Connector Specification |
|---|---|---|
Grounding | One 4-AWG (21.2 mm2 ) copper conductor, or as required by local code. | Cable lug; dual hole. Bottom pair: sized to fit M6 grounding studs. Top pair: sized to fit 1/4-20 UNC grounding studs. |
 | Caution: Before TX Matrix Plus router installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the TX Matrix Plus router (for example, by causing a short circuit). |
