| Rectifier alarms reporting | 20 | |
| 4.3. | SYSTEM MANAGEMENT | 21 |
| System Output Capacity | 21 | |
| System Voltage Control | 21 | |
| System Current | 21 | |
| System Status and Alarm Reporting | 21 | |
| 4.4. | DC DISTRIBUTION | 22 |
| 4.5. | BATTERY MANAGEMENT | 22 |
| Battery Charging and Protection | 22 | |
| Battery Temperature Compensation | 22 | |
| Battery/Load Low Voltage Disconnect | 23 | |
| 4.6. | CONTROLS AND INDICATORS | 23 |
| Front Panel User Interface | 23 | |
| Parameter Locations, Descriptions, and Default Values | 24 | |
| Control Unit Menu Structure | 34 | |
| Front Panel LED Indicators | 40 | |
| 4.7. ALARM OUTPUTS (OUTPUT RELAYS) | 41 | |
| 4.8. EXTERNAL ALARM INPUTS (INPUT RELAYS) | 41 | |
5 | REMOTE MONITORING | 42 | |
| 5.1. | DESCRIPTION | 42 |
| 5.2. | PHYSICAL CONNECTIONS | 42 |
| 5.3. COMMAND AND MONITORING PROTOCOL | 42 | |
6 | SPECIFICATIONS | 43 | |
| 6.1. | AC INPUT | 43 |
| 1MRF28H27BV Rectifiers | 43 | |
| 1MRF28H27BV50 Rectifiers | 43 | |
| 6.2. | DC OUTPUT (WITH EITHER RECTIFIER) | 44 |
| 6.3. | CONTROLS AND INDICATORS | 44 |
| Rectifiers | 44 | |
| Power Shelf Control Unit | 45 | |
| 6.4. | MECHANICAL | 46 |
| 6.5. | ENVIRONMENTAL | 46 |
| 6.6. | COMPLIANCE | 46 |
7 APC WORLDWIDE CUSTOMER SUPPORT | 47 | ||
8 | LIMITED PRODUCT WARRANTY | 48 | |
MX28B400 +24 VDC User’s Manual | Page iii |
