User`s manual
MPS Doc: M359_USER_MANUAL REV J Oct 23, 2014  Page 2 of 30 
  Table of Contents   
Para 
 Description 
Page 
Important Safety Instructions 
3 
1 
General Description 
4 
1.1 
Intended Application 
4 
1.2 
Functional Overview 
4 
2 
Electrical Installation Instructions 
7 
3 
Front Panel Description 
9 
3.1 
Front panel: Main Components 
9 
3.2 
Front Panel: Indicators and Controls 
10 
4 
Rear Panel Description 
11 
5 
Operating the M359 
12 
5.1 
General 
12 
5.2 
Modes of Operation 
12 
5.2.1 
UPS Mode 
12 
5.2.2 
Off State 
13 
5.2.3 
By-Pass Mode 
13 
5.2.4 
Stand-By Mode 
13 
5.2.5 
UPS Test Mode 
13 
5.3 
Local Control (Using the Front panel Switches) 
14 
5.3.1 
PWR ON/OFF Switch 
14 
5.3.2 
INPUT UPS/BY-PSS Switch 
14 
5.3.3 
OUTPUT UPS/BY-PSS Switch 
14 
5.4 
Remote Control (Using the Remote Switches) 
15 
5.4.1 
Remote PWR ON/OFF Switch 
15 
5.4.2 
Remote UPS/BY-PASS Selector 
15 
5.5 
Visual Indicators 
15 
5.6 
UPS Response to Input AC Failure 
17 
5.7 
UPS Response to Overload Condition 
18 
5.7.1 
Output Current Limiting 
18 
5.7.2 
Overload Protection 
18 
5.7.3 
Recovery from Overload Shutdown 
18 
5.8 
UPS Response to Overtemperature Condition 
20 
6 
Maintaining the M359 
21 
6.1 
Battery Test 
21 
6.2 
Battery Service Life 
21 
6.3 
Replacing the Battery Pack 
22 
6.4 
Air Filter Maintenance 
23 
7 
Communication and Remote Control 
23 
7.1 
Ethernet SNMP (Optional) 
23 
7.2 
Dry-Contacts Interface 
23 
7.3 
RS-232 Serial Interface 
25 
7.4 
Remote Control Interface (Remote Switches) 
25 
8 
Specification 
27 
9 
How to Order 
30 
 List of Figures 
Figure 
 Description 
Page 
1 
M359 Block Diagram 
6 
2 
Electrical Connections 
8 
3 
Front Panel, Main Components 
9 
4 
Front Panel, Indicators and Controls 
10 
5 
Rear Panel 
11 
6 
Output Short Circuit Current Waveform 
19 
7 
Output Short Circuit Shutdown 
19 
8 
Overload (3kW) Shutdown 
20 
9 
Dry Contacts 
22 
10 
Remote Switches Connections 
26 










