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Connect the EX4100-H to Power

Connect Earth Ground to an EX4100-H Switch

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect the EX4100-H switch models to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to earth ground.

You must always ground the 340 W external PSU as well. It is recommended that you ground the EX4100-H-12MP switch and the external PSU.

You must install the EX4100-H switches in a restricted-access location and ensure that the switch chassis is always properly grounded. EX4100-H switches have a two-hole protective grounding terminal on the front panel of the switch chassis. Under all circumstances, use this grounding connection to ground the switch chassis. For AC-powered switches, you must also use the grounding wire in the AC power cord along with the two-hole grounding lug connection. This tested switch meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

CAUTION:

Ensure that a licensed electrician has attached the appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.
Note:

The surface of the EX4100-H-12MP will be warm as this is a fanless unit and is based on ambient temperature. Issue show chassis environment to check if there are temperature-related alarms.

Before you connect earth ground to an EX4100-H switch, ensure that you have parts and tools listed in Table 1 available:

Table 1: Parts Required for Connecting an EX4100-H Switch to Earth Ground
Item Switch Models/PSUs Description
Earthing terminal location

EX4100-H-12MP

EX4100-H-24MP

EX4100-H-48MP

Front panel of the switch

Rear panel of the switch

Rear panel of the switch

Earthing terminal location

340 W external PSU for the EX4100-H-12MP

Front panel of the PSU
Grounding cable requirements EX4100-H 6 AWG (13.3 mm²), minimum 90° C wire, or as permitted by the local code—not provided
Grounding lug specifications EX4100-H

Panduit LCD6-14A-L or equivalent—not provided
Screws to secure the grounding lug EX4100-H Two M5 X 10 mm stainless steel screws with washer—separately orderable
Tools required EX4100-H

A Number 2 Phillips (+) screwdriver—not provided

Electrostatic discharge (ESD) grounding strap—not provided
Note:

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

To ground the EX4100-H switch to a proper ground reference:

Note: To attach grounding lug to the switch and PSU you use screwdriver type - Phillips #2 and torque is 22 +/-0.5 lb.in
  1. 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 of the switch.
    Figure 1: Connect the Grounding Cable to the EX4100-H-12MP Switch Connect the Grounding Cable to the EX4100-H-12MP Switch
    Figure 2: Connect the Grounding Cable to the EX4100-H-24MP Switch Connect the Grounding Cable to the EX4100-H-24MP Switch
    Figure 3: Connect the Grounding Cable to the EX4100-H-24F Switch Technical diagram showing bracket installation with screws and grounding symbol on a metal enclosure.
  3. Secure the grounding lug to the protective earthing terminal with the screws.
  4. Secure the grounding cable and ensure that it does not touch or block access to other switch components.
    Warning:

    Ensure that the cable does not drape where people could trip over it.

  5. For grounding the external PSU, connect one end of the grounding cable to a proper earth ground, such as the cabinet in which the PSU is mounted.
  6. Place the grounding lug attached to the grounding cable over the protective earthing terminal on the front panel of the PSU.
    Figure 4: Ground the External PSU of the EX4100-H-12MP Switch Ground the External PSU of the EX4100-H-12MP Switch
  7. Secure the grounding lug to the protective earthing terminal of the PSU with the screws.
  8. Secure the grounding cable and ensure that it does not touch or block access to other PSU components.

Connect Power to an EX4100-H-12MP Switch

Before you connect power to the switch, ensure that you have the following parts and tools available:

  • A power cord appropriate for your geographical location

Ensure that you have connected the switch chassis to earth ground. The power cords also provide additional grounding when you connect the power supply in the switch to a grounded power outlet by using the power cord appropriate for your geographical location (see Table 9 and Table 15).

CAUTION:

For installations that require a separate grounding conductor to the switch chassis, ensure you have a licensed electrician complete this connection before you connect the switch to power. For instructions on connecting earth ground, see Figure 1.
CAUTION:

The power source must be switched off before starting this procedure and switched on only after completing this procedure.

PSU output connections to the switch and PSU inlet connections should not be done when the AC/DC power cord is connected to the main source.

Connect the AC PSM to AC mains through a 2-hole circuit breaker rated at 16 A or as per local code.
CAUTION:

To avoid the switch restart at 100% voltage dip, use of two PSU configuration is recommended for power utilities/substation deployments.

To connect power to the switch:

  1. Remove the protective terminal cover from the input power terminal of the PSU.
    Note:

    An initial batch of PSUs were shipped with torx screws (hexagonal shaped screws) for the protective terminal covers (input and output) of the PSU. If using a PSU with this type of screw; to install or remove the protective terminal covers from the PSU you use screwdriver type Torx 10 with torque 3.5 lb.in
    Figure 5: Remove the protective terminal cover from the input power terminal Remove the protective terminal cover from the input power terminalFig title not required
  2. Insert the power cord wires of the power source into the power terminal inputs of the PSU. On an AC PSU input, the power terminals are marked as L, N, PE (grounding symbol). On a DC PSU input, the power terminals are marked as +, -, and PE (grounding symbol). Always insert the grounding wire or protective earth (PE) power cord wire into the PE input power terminal first. For an AC PSU, insert the line, single phase (L) power cord wire and neutral (N) power cord wire into the L and N input power terminals respectively. For a DC PSU, insert + power cord wire and - power cord wire into the + and - input power terminals respectively.
    Note: Use Phillips #2 screwdriver with torque 6 lb.in
    Figure 6: Insert the power cord wires into the power terminal inputs Insert the power cord wires into the power terminal inputs
  3. Secure the protective terminal cover with the screws over the PSU input power terminal.
    Figure 7: Secure the protective terminal cover over the input power terminal Secure the protective terminal cover over the input power terminal
  4. Remove or loosen the protective terminal cover of the PSU output power terminal. It is not required to remove the protective terminal cover; you can loosen the protective terminal cover until you can see the PSU output power terminals.
    Figure 8: Remove or loosen the protective terminal cover of the PSU output power terminal Remove or loosen the protective terminal cover of the PSU output power terminal
  5. From the PSU output terminal you connect the PSU to the EX4100-H-12MP switch using the interconnecting wire. Secure the y-shaped connection points of the interconnecting wire onto the PSU output power terminal. If required modify the strength of the physical connection by tightening or loosening the screws on the PSU output power terminal. See Figure 9.
    Note: Use Phillips #2 screwdriver with torque 6 lb.in

    The PSU output terminal has two voltages - 54V and 12V. Connect the Y-shared connection points of the interconnecting wire in this manner:

    • 54v + - connect red y-shaped connection point of the interconnecting wire.

    • 54v - - connect black y-shaped connection point of the interconnecting wire.

    • 12v+ - connect brown y-shaped connection point of the interconnecting wire.

    • 12v- - connect gray y-shaped connection point of the interconnecting wire.

  6. Connect the other ends of the interconnecting wire to the PSU connector on the switch. Assuming you are using only one PSU, connect the other ends of the interconnecting wire to the connector for PSU 0 or the connector for PSU 1, but not to both. A PSU connector is used for connecting only one PSU to the switch.Two PSU connectors are used for connecting two PSUs to the switch. Note that you can connect up to two PSUs to the switch - two AC PSUs, two DC PSUs, one AC and one DC PSU, only one AC PSU, or only one DC PSU. See Figure 9.
  7. You connect the other ends of the interconnecting wire to the PSU connector by initially partially loosening the screws on the sides of the PSU connector using slotted/flat head 2.5mm screwdriver with torque 1.77 lb.in.. Then insert the other ends of the interconnecting wire into the PSU connector slots before fastening the screws of the sides of the PSU connector to secure the interconnecting wire to the PSU connector and complete the PSU to switch connection. See Figure 9.
    Note: To remove or install the PSU connector you use slotted/flat head 3.5mm screwdriver with torque 2.65 lb.in.

    The other ends of the interconnecting wire to the PSU connector has to be connected in this manner:

    Assuming you are using only one PSU:

    • Connect the interconnecting wire connected to the 54v+ PSU output terminal to the 54v+ PSU connector input of PSU 0 or PSU 1.

    • Connect the interconnecting wire connected to the 54v- PSU output terminal to the 54v- PSU connector input of PSU 0 or PSU 1.

    • Connect the interconnecting wire connected to the 12v+ PSU output terminal to the 12v+ PSU connector input of PSU 0 or PSU 1.

    • Connect the interconnecting wire connected to the 12v- PSU output terminal to the 12v- PSU connector input of PSU 0 or PSU 1.

    Figure 9: Connect Switch to the PSU Using the Interconnecting Wire Connect Switch to the PSU Using the Interconnecting Wire
  8. Secure the protective terminal cover with the screws over the PSU output power terminal.
    Figure 10: Secure the protective terminal cover with the screws over the output power terminal of the PSU Secure the protective terminal cover with the screws over the output power terminal of the PSU

Connect Power to an EX4100-H-24MP or EX4100-H-24F Switch

Before you connect power, ensure that you have a power cord appropriate for your geographical location.

For information about the supported AC power cord specifications, see Table 9.

Ensure that you have connected the switch chassis to earth ground. The AC power cords also provide additional grounding when you connect the power supply in the switch to a grounded AC power outlet by using the AC power cord appropriate for your geographical location.

Note:

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

EX4100-H switches have 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 additionally. For example, the grounding connection of the AC or DC power cord provides additional grounding. This switch was tested to meet or exceed all applicable EMC regulatory requirements with the switch chassis protective grounding terminal connected correctly.
CAUTION:

  • For installations that require a separate grounding conductor to the switch chassis, have a licensed electrician complete this connection before you connect the switch to power. For instructions on connecting earth ground.

  • The power source must be switched off before doing this procedure, and switched on only after completing this procedure.

  • PSU output connections to switch and PSU inlet connections should not be done when the AC/DC power cord is connected to the main source.

  • When connecting the EX4100-H-24MP or EX4100-H-24F switch to the AC power source, you must provide an external circuit breaker (2-pole circuit breaker or 4-pole circuit breaker based on your switch) rated minimum 20 A in the building installation.

  • When connecting the EX4100-H-24MP or EX4100-H-24F switch to the DC power source, we recommend that you use a customer-site 2-pole circuit breaker rated for 25A 80 VDC, or as required by local electrical code.

  • To avoid the switch restart at 100% voltage dip, use of two PSU configuration is recommended for power utilities/substation deploymentsI

To connect power to the switch:

  1. Loosen the screw of the power terminal door and open the power terminal door. Recommended torque is 4.5 +/- 0.5 Lb.in. Recommended screwdriver is Phillips #2 screwdriver.
    Figure 11: Open the power terminal door Open the power terminal door
  2. On the rear of the switch, the first slot to insert the PSU is regarded as the 0th slot and the second slot to insert the PSU is regarded as the 1st slot. After insertion of the PSUs into these slots, their corresponding connections are made from the power input terminals on the front of the switch labeled PSU 0 and PSU 1.
    1. If an AC PSU is inserted into the 0th PSU slot at the rear of the switch, then on the front of the switch, connect the L, N, and G terminals of the section labeled as PSU 0 of the power input terminal, to the AC power source.
    2. If an AC PSU is inserted into the 1st PSU slot at the rear of the switch, then on the front of the switch, connect the L, N, and G terminals of the section labeled as PSU 1 of the power input terminal, to the AC power source.
    3. If a DC PSU is inserted into the 0th PSU slot at the rear of the switch, then on the front of the switch, connect the DC+, DC-, and G terminals of the section labeled as PSU 0 of the power input terminal, to the DC power source.
    4. If a DC PSU is inserted into the 1st PSU slot at the rear of the switch, then on the front of the switch, connect the DC+, DC-, and G terminals of the section labeled as PSU 1 of the power input terminal, to the DC power source.
    Note: You can insert PSUs into the rear of the switch in this configuration:

    • One AC PSU

    • One DC PSU

    • Two AC PSUs

    • Two DC PSUs

    • One AC and one DC PSU
  3. Assuming you have inserted at least one AC PSU into the switch at the rear; so to connect the AC PSU to the main power source, loosen the screws marked under the labels L, N, and G and insert the wires of the AC power cord into the slots behind the screws. Tighten the screws and secure the connections. Note that during this procedure, do not plug in the AC power cord into an AC power source; do it only after securing the connections and securing the terminal door.
    Note:

    Recommended torque is 7 +/- 0.5 Lb.in. Recommended screwdriver type is Phillips #2 or slotted/flat head 6 mm.
    Figure 12: Connect AC PSU to the power Connect AC PSU to the power
  4. Assuming you have inserted at least one DC PSU into the switch at the rear; to connect the DC PSU to the main power source, loosen the screws marked under the labels DC+, DC-, and G and insert the wires of the DC power cord into the slots behind the screws. Tighten the screws and secure the connections. Note that during this procedure, to not plug in the DC power cord into a DC power source, but to do it only after securing the connections and securing the terminal door.
    Note:

    Recommended torque is 7 +/- 0.5 Lb.in. Recommended screwdriver type is Phillips #2 or slotted/flat head 6 mm.
    Figure 13: Connect DC PSU to power Connect DC PSU to power
  5. Shut the terminal door and tighten the screw of the terminal door. Recommended torque is 4.5 +/- 0.5 Lb.in. Recommended screwdriver is Phillips #2 screwdriver.