Electrical Connections—UPS

3.4.5EPO Input—Optional

NOTICE

Risk of exceeding internal voltage limits. Can cause equipment damage.

Do not apply more than 12V to the Emergency Power Off (EPO) input. Exceeding 12V on this input can damage the Liebert APM’s internal circuitry and control boards. Exceeding 12V will also put the Liebert APM in an EPO state, and the unit will not reset, making it non- functional.

The UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.

The J6 connector, shown in Figure 19, is the remote EPO input interface. The EPO has NO/NC contacts that become active when shorting terminals J6: 3 and 4 or open terminal connection J6: 2 and 1.

If an external Emergency Stop capability is required, it is connected at terminals J6: 1 and 2 and at

J6: 3 and 4 on the monitor board. It also is connected to the Normally Open or Normally Closed remote stop switch between these two terminals using shielded cable (see Figure 19 and Table 9). If this function is not used, terminals J6:3 and 4 must be opened and J6:1 and 2 must be closed.

Figure 19 EPO wiring and signal names for J6

J6

EPO-NO EPO-NC

 

+12V

 

+12V

 

J6

 

 

EPO-NO

+12V

+12V

EPO-NC

 

 

NOTE: The black square () on each connector indicates Pin 1.

 

 

Refer to Figure 16 for the location of connector J6.

Table 9

EPO input contact relays

 

 

 

 

Position

Name

Description

 

J6.1

EPO_NC

EPO Activated when opened to J6.2

 

 

 

 

 

J6.2

+12V

EPO Activated when opened to J6.1

 

 

 

 

 

J6.3

+12V

EPO Activated when shorted to J6.4

 

 

 

 

 

J6.4

EPO_NO

EPO Activated when shorted to J6.3

 

 

 

 

 

NOTE

The Emergency Stop action within the UPS shuts down the rectifier, inverter and static bypass. It does not internally disconnect the input power supply. To disconnect ALL power to the UPS, open the upstream feeder breaker(s) when the remote EPO is activated.

NOTE

Normally Closed EPO – J6: 1, 2, these terminals are supplied factory-linked on the Bypass Module on the UPS and must remain installed if using NO contacts.

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded for maximum runs between 80 and 200 feet (25-60m), respectively.

36

Page 45 Page 47
Page 46
Image 46
Emerson 115-600V, 115-120, 15-90KVA EPO Input-Optional, EPO input contact relays, Refer to for the location of connector J6
Page 45 Page 47

115-600V, 115-208, 115-120, 115-50/60HZ, 115-480 specifications

The Emerson 15-90KVA series is a robust and versatile power solution designed for various applications including commercial, industrial, and data center operations. Operating at voltage ranging from 115 to 480 volts, and supporting frequencies of either 50 or 60 Hz, this series is engineered to meet diverse power requirements.

One of the standout features of the Emerson 15-90KVA is its exceptional reliability and performance under varying load conditions. This power system incorporates cutting-edge technologies that enhance operational efficiency while minimizing downtime. The robust design of the system enables it to maintain optimal performance even in harsh environmental conditions, providing power continuity and safeguarding critical operations.

The Emerson 15-90KVA is equipped with advanced protection mechanisms that ensure the safety of connected equipment. These include overload protection, short-circuit protection, and thermal protection systems, which work together to prevent potential damage from power surges or faults. Moreover, the unit features a user-friendly interface that facilitates easy monitoring and control, enabling operators to track performance metrics and manage power supply effectively.

Another significant characteristic of this power series is its modular design, allowing for scalability and flexibility. Users can easily add or remove capacity based on changing power demands without the need for extensive system overhauls. This scalability makes the Emerson 15-90KVA ideal for growing businesses that require adaptable power solutions.

Energy efficiency is a focal point for the Emerson power series. Utilizing advanced power electronics and intelligent control algorithms, the system minimizes energy losses, ensuring that more power is available for direct usage. This not only reduces operational costs but also aligns with growing sustainability initiatives by lowering the overall carbon footprint.

In summary, the Emerson 15-90KVA series is a high-performance power solution characterized by its reliability, advanced protection features, modular scalability, and energy efficiency. Its versatility across multiple voltage levels and frequency options makes it suitable for a wide range of applications, solidifying its position as a preferred choice in the industry. Whether for industrial facilities, data centers, or commercial spaces, the Emerson 15-90KVA is designed to meet and exceed power demands effectively and efficiently.
Top Page Image Contents