Psu Can Bus Monitoring, Alarms, And Controls - Motorola DIMETRA MTS 4 Installation, Configuration, And Service Manual

Applicant: Motorola Solutions
296 | Power Supply Unit
• has the capability to charge a 48V backup battery during AC operation mod.
• provides several DC output voltages to supply Base Radios, Site Controller, ATCC and Fans
• complies with the appropriate CE marking, EMC, EMI and safety requirements.
There is an ON/OFF switch on the front panel of the PSU module which connects/disconnects DC output voltages.
The PSU operates in the following modes:
• DC only operation at -48VDC (within -41VDC to -60VDC).
• AC only operation at 100/240VAC (within 90 VAC to 264 VAC;) without battery charging.
• AC operation (within 90 VAC to 264 VAC;) and automatic switch over to DC backup battery operation when AC
fails.
Warning: Input Reverse Voltage Protection: The PSU is protected from damage due to a reverse polarity
input connection. If the input polarity is reversed, the DC In Status LED will be solid red.
The MTS cabinet itself is wired to positive ground earth. The Power Supply Unit has a floating DC ground concept.
For more information on PSU technical specifications, see

PSU CAN Bus Monitoring, Alarms, and Controls

The PSU is monitored and controlled by the Site Controller. All monitoring outputs, alarm outputs, PSU ID number
and control inputs are available through a CAN Bus. It is also possible to update the PSU firmware through the CAN
Bus while the PSU is operational.
A unique identification of up to 4 PSUs is achieved by means of software. The assigned ID is used to identify the
PSU on the CAN Bus for commands and alarms. For more information on CAN Bus, see
PSU monitoring parameters that can be measured through the CAN Bus:
• PSU temperature: -30 °C to +100 °C, tolerance: ±2 °C.
• Battery current: -20 A to +10 A, tolerance: ±1%.
• Battery voltage: 30 V to 60 V, tolerance: ±1%.
• Battery temperature: -30 °C to +100 °C, tolerance: ±2 °C.
• 7 V output voltage: 0 V to 10 V, tolerance: ±2%.
• 7 V output current: 0 A to 10 A, tolerance: ±2%.
• 28.5 V output voltage: 0 V to 30 V, tolerance: ±2%.
• 28.5 V output current: 0 A to 10 A, tolerance: ±2%.
• PSU output power: 0 W to 1100 W, tolerance: ±2%.
• Fan output voltage: 0 V to 30 V, tolerance: ±2%.
• PSU input air temp.: -30 °C to +100 °C, tolerance: ±2 °C.
PSU alarms available through CAN Bus:
• DC Source Fail: Indicating DC input voltage outside limits (below 43 V).
• DC Out Fail: DC output voltages out of limits.
• AC Source Fail: Early warning, indicating that the AC input is interrupted and the PSU starts to operate from DC
input source in 15 ms. (if a backup source is present).
• Software Fail: Indicating software is corrupted or unable to initialize.
• Over Temperature: Indicating over temperature detected 5 °C to 10 °C before shutdown.
• Fan 1 alarm: Fan 1 not operating (fan has stopped or its running speed is below specification), PSU has received a
high signal (open collector) from fan tray 1 through fan connector 1.
• Fan 2 alarm: Fan 2 not operating (fan has stopped or its running speed is below specification), PSU has received a
high signal (open collector) from fan tray 2 through fan connector 2.
Send Feedback | September 2014 | 6802800U74-AD
Note: DC operation mode does not allow any battery controlling.
Equipment Type: ABZ89FC5827 / 109AB-5827
Power Supply Unit Specifications on page 369.
Site Controller on page 263.
Exhibit D2