Black Box LEH906A-2GSFP, LEH906A-2SFP, LEH908A, LEH906A-2MMST, LEH1008A Alarms for Power Failure

Models: LEH1104A-2SFP LEH1008A-2SFP LEH1008A-2MMSC LEH906A-2GSFP LEH906A-2MMST LEH1008A-2GSFP LEH908A LEH1008A LEH1104A-4MMSC LEH1104A-2GSFP LEH906A-2MMSC LEH906A-2SFP LEH1008A-2MMST LEH1104A-4MMST Hardened Managed Ethernet Switche

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Chapter 3: Installation

3.2.3 Alarms for Power Failure

There are two pins on the terminal block used for power failure detection. It provides the normally closed output when the power source is active. Use this as a dry contact application to send a signal for power failure detection.

Table 3-1a. Power failure alarms for LEH900 Series.

Power Input Assignment

Power 3

12 VDC

DC jack

 

 

 

Power 2

+

12–48 VDC

 

-

Power ground

Power 1

+

12–48 VDC

 

-

Power ground

 

Earth ground

 

Relay output rating

 

1 A @ 24 VDC

Relay Alarm Assignment

 

 

Fault

Warning signal disable for the following:

 

• The relay contact closes if Power 1 and Power 2 both fail, but Power 3 is ON.

 

• The relay contact closes if Power 3 fails, but Power 1 and Power 2 are ON.

Table 3-1b. Power failure alarms for LEH1000 and LEH1100 Series.

Power Input Assignment

Power 3

47 to 57 VDC

DC jack

 

 

 

Power 2

+

47–57 VDC

 

-

Power ground

Power 1

+

47–57 VDC

 

-

Power ground

 

Earth ground

 

Relay output rating

 

1 A @ 250 VAC

Relay Alarm Assignment

 

 

Fault

Warning signal disable for the following:

 

• The relay contact closes if Power 1 and Power 2 both fail, but Power 3 is ON.

 

• The relay contact closes if Power 3 fails, but Power 1 and Power 2 are ON.

NOTE: The relay output is normally in the open position when there is no power to the switch. Please do not connect any power source to this terminal to prevent shorting your power supply.

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Black Box LEH906A-2GSFP, LEH906A-2SFP, LEH908A, LEH906A-2MMST, LEH906A-2MMSC, LEH1104A-2GSFP, LEH1008A Alarms for Power Failure

LEH1104A-2SFP, LEH1008A-2SFP, LEH1008A-2MMSC, LEH906A-2GSFP, LEH906A-2MMST specifications

Black Box has established itself as a leader in providing robust networking solutions, and its range of hardened managed Ethernet switches, including the LEH1104A-4MMST, LEH1008A-2MMST, LEH906A-2SFP, and LEH906A-2MMSC, exemplifies this commitment. These switches are specifically designed to withstand the harsh environments often found in industrial and outdoor settings, making them ideal for applications such as transportation, utility management, and manufacturing.

The LEH1104A-4MMST model features four 10/100/1000 Mbps Ethernet ports, providing a flexible solution for networks requiring fast and reliable connectivity. It supports Power over Ethernet (PoE), enabling both data and power to be transmitted via a single cable, thereby simplifying installations and reducing wiring costs. This model also includes advanced features such as VLAN support, IGMP Snooping, and Quality of Service (QoS), ensuring optimized traffic management and network efficiency.

Similarly, the LEH1008A-2MMST switch offers eight ports and is built to handle a higher volume of connections without sacrificing performance. It boasts Layer 2 and Layer 3 management capabilities, allowing for complex network configurations and enhanced security measures such as port security and access control lists. The robust design and metal enclosure protect it from dust, moisture, and extreme temperatures.

The LEH906A-2SFP and LEH906A-2MMSC switches focus on modularity and connectivity flexibility, with SFP (Small Form-factor Pluggable) ports that enable users to choose the appropriate transceivers for their specific distances and media types, whether they require fiber or copper connections. Both models support dual-power inputs for redundancy and reliability, critical features for mission-critical applications.

All these switches are crafted to comply with industrial standards, ensuring reliable performance in diverse applications. Features such as redundant power supplies, fast recovery times, and support for protocols like SNMP (Simple Network Management Protocol) make network monitoring and management efficient and hassle-free.

In summary, Black Box’s hardened managed Ethernet switches, including the LEH1104A-4MMST, LEH1008A-2MMST, LEH906A-2SFP, and LEH906A-2MMSC, provide a perfect blend of durability, scalability, and management capabilities. These switches are engineered to meet the rigorous demands of industrial networking while ensuring seamless connectivity for diverse applications, making them an excellent investment for organizations looking to enhance their network infrastructure.