HP MicroLogix 1761-NET-ENI manual ENI Port Identification, External Power Supply Wiring

Installation and Wiring 2-5

ENI Port Identification

ETHERNET

RS232

FAULT

Ethernet Port (ENI Port 1)

NET

TX/RX TX/RX

RS-232 Mini-DIN (ENI Port 2)

IP

Write-on area for

Ethernet IP address

PWR

CABLE EXTERNAL

External Power Supply

Wiring

WARNING

!

EXPLOSION HAZARD - In Class I Division 2 applications, an external, Class 2 power supply must be used. The DC Power Source selector switch on the ENI must be set to EXTERNAL before connecting the power supply to the ENI.

IMPORTANT

24

VDC

DC

NEUT

CHS

GND

Bottom View

•In non-hazardous locations, external power is not required. Some devices (such as a MicroLogix controller) provide power to the ENI via a cable connected to ENI port 2. Be sure to set the DC power source selector switch to match your particular configuration, CABLE or EXTERNAL.

•Always connect the CHS GND (chassis ground) terminal to the nearest earth ground. This connection must be made whether or not an external 24V dc supply is used.

Publication 1761-UM006A-EN-P - February 2001