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990-1401
Installation Guide APC BC300 Series 40kW 208/450/480V UPS 25
1) Note the serial number and date of purchase of the APC BC300 Triple Chassis. Contact
APC Customer Support at the phone number or address listed in How to Contact APC
section of this manual.
2) Be prepared to provide a description of the problem. A technician will help solve the
problem over the phone, if possible, or will give you a return material authorization (RMA)
number.
3) If the APC BC300 Triple Chassis is under warranty, repairs are free of charge. If the
warranty has expired, there will be a nominal charge for repair.
4) Pack the APC BC300 Triple Chassis carefully in its original packaging, if possible. Do not
use polystyrene beads for packing. Damage sustained in transit is not covered under the
warranty. Enclose a letter in the package with your name, address, RMA number, a copy of
the sales receipt, daytime phone number, and payment (if applicable).
5) Mark the RMA number clearly on the outside of the shipping carton. The factory will not
accept any materials without this marking.
6) Return the Triple Chassis by insured, prepaid carrier to the address given to you by APC
Customer Support.
3.5.6 Product Specifications
3.5.6.1 Monitoring Port Pin Assignments
The Monitoring port is a 9-pin communications port. The port operates with no flow control at
a rate of 2400 baud. The data format is 8 data bits with 1 start bit, 1 stop bit, and no parity.
When the Triple Chassis operates with simple signalling, the following limitations and
capabilities apply to the Monitoring port:
• Pins 3, 5, and 6 are open collector outputs which must be pulled up to a common
referenced supply no greater than +40 VDC. The transistors are capable of a non-
inductive load of 25 mA. Use only Pin 4 as the common.
• The output at Pin 2 generates a low-to-high RS-232 level when the device is
signalling an On Battery condition. The pin is normally at a low RS-232 level.
• The UPS is signalled to shut down when a high RS-232 level is applied to Pin 1 for
4.5 seconds. Shutdown is also dependent on the UPS status.
When the Triple Chassis operates with advanced signaling, the following limitations and
capabilities apply to the Monitoring port:
• Pin 7 is unassigned.
• DC operating voltage is available on Pin 8. This voltage may be from the UPS or from
an external adapter.