APC 990-4053 manual Product Specifications Monitoring Port Pin Assignments

External Connection

4)Pack the APC Silcon 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.

4.7.6 Product Specifications

4.7.6.1 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 signalling, 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, whichever is greater.

990-4053

26 Installation Guide APC Silcon 480kW 400V UPS