NonStop S-Series Hardware Installation and FastPath Guide (G06.29+)

Introduction
HP NonStop S-Series Hardware Installation and FastPath Guide—541880-002
1-25
Installation Overview
Emergency Power-Off Cables
Emergency power-off (EPO) cables automatically disconnect electrical power to
connected equipment if an electrical emergency occurs.
About EPO Cables
•
EPO cables usually connect to a junction box of the computer room EPO system.
(The EPO system must provide contact closure during an emergency.)
•
One EPO cable for each enclosure is shipped with your system.
•
The EPO cable is equipped with a two-pin Mate-N-Lock style plug at one end. This
plug attaches to the EPO connector socket in slot 56.
•
The other end of the EPO cable is unterminated, to attach to the EPO system.
EPO Cable Requirements
Within the United States
An EPO disconnect is required in a system if the system is installed in a computer or
data processing room that is designed to comply with the construction and
fire-protection provisions of:
•
NFPA-75, Protection of Electronic Computer/Data Processor Equipment
•
Article 645 of NFPA-70, the National Electric Code
Outside the United States
EPO disconnects are usually not required unless specified by local authorities.
If a System Requires EPO Capability
If a system requires EPO capability, the customer is responsible for connecting an
EPO cable to the EPO connector in slot 56 on the service side of all system
enclosures.
Note. For EPO information for IOAM enclosures, contact your service provider who can refer
to the Modular I/O Installation and Configuration Guide located in the NTL Hardware Service
and Maintenance Collection in the Support and Service Library.
Figure 1-11. EPO Cable
VST980.vsd
Unterminated End