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Fast Track to Rack Installation and Power

This procedure guides you through the simplest steps to install your EX4100-H-12T switch in a rack and connect it to power. Have more complex installation needs? See Install the EX4100-H-12T Switch.

Mount an EX4100-H-12T Switch in a Desktop Orientation or Flat Surface Within a Cabinet in a Rack

Desktop mounting is the default mounting option for the EX4100-H-12T switch.

Warning:

For all mounting options:

  • For traffic control application (NEMA TS2), the EX4100-H-12T switch must be installed in a NEMA 4 certified cabinet or certified enclosure as per NEMA TS2 standard ( section 7 requirement). The cabinet shall meet the NEMA TS2 section 7 requirement.

  • EX4100-H-12T with all types of mounting (wall, desk, magnet, rack, and Din) must be installed in a certified cabinet.

  • User shall assess the climatic/environmental conditions at installation site to select the certified cabinet/enclosure to ensure that the switch (and PSU if using external PSU) is protected from dust, rain, salt fog, pollutants to prevent any damage. Below are few examples.

    • For installing the switch in outdoor environment (to protect from dust, corrosion, moisture, salt fog, pollutants, rain), a sealed enclosure certified to IP 65 or equivalent must be used.

You can mount the EX4100-H-12T switch on a desk or any other level surface within a certified cabinet. The surface should be flat or level and not be an inclined surface or area.

Note:

Minimum clearance of 2 inches (5 cm) on all non‑mounting sides unless otherwise required by enclosure airflow design.
  1. Place the switch and the PSU on a flat surface or a desk within a cabinet.
  2. Connect to power

Connect the EX4100-H-12T to Power

EX4100-H-12T accepts a wide range of DC input power. To connect the EX4100-H-12T switch to power, perform the following tasks:

Note:

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect the EX4100-H-12T switch to earth ground before you connect power to the switch.

The EX4100-H-12T switch has a two-hole protective grounding terminal. We recommend that you use the switch chassis protective grounding terminal as the only method for grounding the switch chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods as additional measures. This switch was tested to meet or exceed all applicable EMC regulatory requirements with the switch chassis protective grounding terminal connected correctly.

Ground the EX4100-H-12T Switch

To ground the EX4100-H-12T switch, perform the following steps:

Note:

  • Earthing terminal location/grounding point—Front panel of the switch

  • Grounding cable requirements—6 AWG (13.3 mm²), minimum 90 °C wire, or as permitted by the local code (not provided)

  • Screws to secure the grounding lug—Two M5 X 10 mm stainless steel screws with washer (separately orderable)

  • Tools required

    • A Number 2 Phillips (+) screwdriver (not provided)

    • Electrostatic discharge (ESD) grounding strap (not provided)

  • The grounding kit (JNP-GL-2H6-M5-RA) includes the lug and screws and is separately orderable.

  • To attach grounding lug to the switch you use screwdriver type - Phillips #2 and torque is 22 +/-0.5 lb.in

  1. To ground the switch, connect one end of the grounding cable to a proper earth ground, such as the cabinet in which the switch is mounted.

  2. Place the grounding lug attached to the grounding cable over the protective earthing terminal on the front panel.

  3. Secure the grounding lug to the protective earthing terminal with the screws. Ensure that the grounding cable does not touch or block access to other switch components.

Connect the Input Power Cable and Power On the Switch

The EX4100-H-12T switch is DC powered to support a regulated 9.6V-60V input. The DC input shall be connected to the switch on the front panel connectors PSU 0 and/or PSU 1, depending on whether you want one PSU input or with both PSU inputs for redundancy. Note that on the front panel, there are labels, namely, PSU 0 and PSU 1 that identify the PSU connectors.

Table 1: Power Specifications for the EX4100-H-12T Switch

Power Specification

Values

Input voltage range

Redundant DC input voltage: 9.6 VDC to 60 VDC *

Maximum input current

4.7A

Power consumption

45 W **

  • * - It is recommended for redundant DC inputs be at the same voltage.

  • ** - It is recommended to use a minimum 60 W power supply.

Note:

The EX4100-H-12T switch supports an off-the-shelf 24 VDC PSU input in addition to a regulated DC input.
CAUTION:

  • You must keep the power source switched off before starting this procedure and switch it on only after completing this procedure.

  • Ensure that you have completed the grounding procedure of the switch.
CAUTION:

  • Connect the EX4100-H-12T switch only to a regulated isolated DC power source that complies with the ES1 requirement of the IEC 62368-1 safety standard.

  • This input voltage to the switch shall be from +9.6V to +60V DC

  • The switch and DC power source shall be indoors or in the same cabinet

  • The DC cable that connects the power source to the EX4100-H-12T switch must not be exposed to outdoor conditions or outdoor environment.

  • The external power supply unit (PSU) must meet both requirements, minimum 5A capacity and minimum 100 W capacity. There is no maximum/upper limit on the current or power specifications of the external PSU.
Warning:

It is critical that the polarity on the front-panel PSU connectors of the switch, are observed correctly. The “+” terminal on the front panel PSU connector of the switch must be connected to the “+” terminal of the external DC source (or external PSU), and the “–” terminal on the front panel PSU connector of the switch must be connected to the corresponding “–” terminal of the external DC source (or external PSU). Follow the same procedure if you are connecting two DC sources (or external PSUs) to the front panel PSU connectors of the switch.

Reverse Polarity Protection

Overview

The device incorporates an internal metallic protection fuse to mitigate potential fire hazards or severe internal damage in the event of accidental reverse polarity connection during installation.

This fuse is intended solely as a safety protection mechanism and not as a replaceable operational component.

The device uses internal E-fuses, not metallic fuses, for system overcurrent protection (OCP). The metallic fuses are provided strictly for protective safety purposes and not intended for routine operational protection.

Power Connection Requirements

Before powering the switch, ensure that the power supply is connected with correct polarity.

  • Connect the +ve (red wire) from the positive terminal of the DC PSU to the positive terminal (in the PSU connector) of the switch.

  • Connect the -ve /GND (black wire) from the negative terminal of the DC PSU to the negative terminal (in the same PSU connector) of the switch.

  • If required, repeat the above process to connect another DC PSU, but ensure that you use the vacant PSU connector on the switch to make the connection.

Table 2: Power Connection Requirement

Terminal

Connection

+ve (Red wire)

Connect to positive (+) terminal of DC PSU

-ve/ GND (Black wire)

Connect to negative (-) terminal of DC PSU

You must verify the polarity of the input power supply connections before powering on the switch.

Reverse Polarity Protection Mechanism

If the PSU is connected with reverse polarity:

  • The internal metallic fuse will blow immediately.
  • The device will stop functioning and will not power on.
  • This protective action prevents overheating, fire risk, or catastrophic failure of internal components.

Important Warning

Do not connect the power input in reverse polarity.

Reverse polarity connection will result in:

  • Blowing of the internal fuse

  • Permanent interruption of device operation

Warranty Limitation

Damage resulting from incorrect installation, including reverse polarity power connection, is considered user error.

Therefore:

  • Failures caused by reverse polarity are not covered under the product warranty.

  • Units returned with blown protection fuse due to incorrect polarity may be rejected for warranty claims.

Installer Responsibility

The installer must:

  • Verify input power supply polarity before connection

  • Follow the installation instructions provided in this guide

  • Use appropriate tools such as a multimeter to confirm polarity where necessary

  • Failure to follow these instructions may result in equipment damage and voided warranty.

To connect the switch to power:

  1. The switch has two power connectors - PSU 0 and PSU 1. You can connect DC power to either one PSU connector or both PSU connectors.

  2. To connect to a PSU connector, for example PSU 0, partially loosen the screws on the sides of the PSU 0 connector using a slotted/flat head 2.5 mm screwdriver with a torque 1.77 lb.in. (See label 1 in the below image).

  3. Insert the two ends of the power input wire into the PSU 0 connector slots before fastening the screws on the sides of the PSU connector to secure the wires. (See label 2 in the below image).

  4. Connect the two wires to the DC PSU to complete the connection.

  5. Switch on the DC PSU.

Note:

We recommend using a DC power cable no longer than 2 meters. Use a copper wire of 16 AWG with temperature range of -40 °C through 105 °C.