Analog Connector Slave Unit Master Unit
Program only the master. Set slave output and OVP slightly higher than the master to ensure that slave stays in CC mode
Load |
| Load Connection |
Only local sensing permitted |
| Connect for optional remote sensing |
Figure 4-7. Auto-Parallel Connection (Remote Sensing Optional)
If a "slave" unit experiences a desired shutdown condition (such as overtemperature or overcurrent), it will not automatically shut down all other units. You must first enable remote inhibit (RI) and discrete fault indicator (DFI) operation. See "Fault/Inhibit Operation" in Appendix F for wiring information and "Questionable Status Group" in Chapter 8 for programming information.
Connecting Units in Series
Floating voltages must not exceed 240 Vdc. No output terminal may be more than 240 V from chassis ground.
Figure 4-8 shows how power supplies can be connected in series for higher voltage output. Series connections are straightforward in this case.
Program each power supply independently. If two units are used in the series configuration, program each unit for 50% of the total output voltage. Set the current limit of each unit to the maximum that the load can handle without damage.
Each power supply has a reverse voltage protection diode across its output. If a reverse voltage is applied, the unit cannot control the current conducted through this diode. To avoid damaging the unit, never connect it in such a way that a reverse voltage can force it to conduct current in excess of the unit’s maximum reverse diode current (see Table A-2).
User Connections 33
