Epilson STSTM

2.5.1Connection of the JBUS Communication Card

The JBUS communications card provides two DB-9 ports (RS232 and RS485 communications). Only one commu- nication port may be used at a time.

For information on using the communication card, see the JBUS communication card manual.

Figure 2-8: JBUS Communication Card.

5 4 3 2 1

9 8 7 6

RS232:

Pin 2: Rxd (or Txd)

Pin 3: Txd (or Rxd)

Pin 5: Com (shield)

RS485:

 

 

 

JBUS

MODBUS

Pin 4: Rx-

 

Pin 8: Rx+

 

Pin 5: Tx-

Pin 9: Tx+

2.6Check Points Before and After Start Up

Before starting the Epsilon STS™, be certain that you fully understand the operation of the indicators, controls, and operational sequences. MGE UPS SYSTEMS,INC. offers professional start up services in most countries. It is suggested that before applying power to your Epsilon STS™, your contract with MGE for a professional start up with an MGE Field Engineer.

2.6.1Pre-Start Up Safety Check List

◗All power and control wires have been properly connected and securely tightened.

◗The upstream and downstream protective devices are not tripped, and have been sized properly for the STS and load requirements.

◗The input voltage is the same as indicated on the STS nameplate, located inside the door of the Epsilon STS™ module.

◗The air filters located inside the STS module door (400/600A units only) are properly installed and free of dust, dirt, and debris. Make certain that no objects block the air intake underneath and around the front bottom of the STS module and the air exhaust on the top of the STS module is free of obstructions.

◗All switches in the STS, CB1-5, are in the OFF (open) position.

◗All panels and covers are replaced and secured back in place.

2.6.2Post-Start Up Safety Check List

After initial start-up of the system, normal operation should be tested. At the minimum, the following tests should be performed as applicable to your installation.

◗Emergency power off (EPO) test.

◗Remote emergency power off (REPO) test (if applicable).

◗STS start up on preferred source.

◗Transfer test on preferred source loss.

◗Maintenance bypass procedure.

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Installation

86-504004-00 B03