YSI 5200 - Manual (Page 24)

YSI Incorporated 22 5200 Recirculating System Monitor
supply” or other power source which is “hazardous live” per UL 3101-1 Section 3.5.2.
The 5200 Monitor may be powered by any regulated 8.5–16.5 VDC source that can provide
approximately 800mA of current and is isolated from mains supply by double or reinforced insulation.
(An unregulated supply may also be acceptable if the peak output voltage does not exceed 16.5VDC.)
WARNING: A UL Listed slow-blow fuse with a maximum current rating of 1A must be connected in
series with the positive terminal of any power supply not provided by YSI.
CAUTION: Power supply voltage above 16.5VDC may permanently damage the 5200 Monitor.
When the front panel of the 5200 Monitor is removed, take care not to drop the cover since it is not
hinged to the Monitor.
CAUTION: The sensitivity and stability of the monitor will be impaired if the monitor is not grounded.
Do not apply power to the Monitor until all electrical connections are verified and secure. Connect earth
ground to the 5200 I/O plate (see Figure 3-8 I/O Plate).
3.6.3 Back-up Power
WARNING: A UL Listed slow-blow fuse with a maximum current rating of 1A must be connected in
series with the positive terminal of the back-up supply.
The 5200 Monitor will automatically switch to auxiliary battery back-up operation if primary voltage
drops below 8.5 VDC, providing back-up power is connected. For proper back-up power operation, use
the YSI 5578/5579 Power Supply as the primary power source. Use of a different primary power supply
may prevent proper switching to back-up power.
WARNING: A UL Listed DC power supply is required for any installation which is connected to “mains
supply” or other power source which is “hazardous live” per UL 3101-1 Section 3.5.2.
The auxiliary power source is user supplied and can come from a variety of choices including lead acid or
gel cell external batteries. The 5200 will not charge batteries, so quality assurance maintenance
procedures must be established if batteries are used as the back-up power source.
Input power requirements for back-up operation are the same as primary power, 8.5–16.5 VDC at
approximately 800mA. With no primary power, when the back-up voltage falls below 7.0 volts the 5200
will cease to operate properly.
Connecting back-up power to the 5200 Monitor
Refer to Figure 3-9.
• If necessary, disconnect power to the 5200 Monitor
• Route the back-up supply wire through the compression fitting and into the case. See Section 3.3.1
Sealants, Desiccants and Securing the Monitor.
• Connect the back-up wires to the 4-pole 605223UL Pluggable Socket Connector so that the positive
wire goes to the Back-up (+) terminal and the negative wire goes to the Common (-) terminal.
• Connect the 4-pole 605223UL Pluggable Socket Connector to Inline Power Ferrite Assembly. Failure
to do so could cause catastrophic monitor failure.
• Connect the Inline Power Ferrite Assembly to the I/O plate power connector.
IMPORTANT: After completing system installation, test back-up power by removing main power while
all control/alarm relays are energized. At cold temperatures, logged data may be lost due
to temporary power loss when switching to battery backup power.