Hitech Pro User Manual English - Tuncmatik

Communication protocol of the RS-232.
The communication protocol used is of «MASTER/SLAVE» type. The computer or computer system
(«MASTER») asks about a certain data, and the UPS («SLAVE») answers immediately with the
required data.
• Physical structure of the RS-485.
Unlike other serial communication links, this uses only 2 wires (pins 4 and 9 of the female DB9
connector) to perform the dialogue between the systems connected to the network. The
communication will be established by sending and receiving signals in differential mode, which gives
the system great immunity to noise and a long reach (approx. 800 m).
Pin-out
- Pin 4. Output signal A (+) of the RS-485.
- Pin 9. Output signal B (–) of the RS-485.
Communication protocol of the RS-485
The communication protocol of the RS-485 channel is developed to enable the UPS to dialogue with other
computer systems that have this kind of channel.
• The communication parameters RS-232 and RS-485 are the following:
Communication speed: 1200, 2400, 4800, 9600 or 19200 Bauds.
No. information bits: 8 Bits.
No. stop bits: 1 or 2 stop bits.
Parity: - Even, Odd or None
4-3-7. EPO terminals (X50)
The equipment has two terminals ready for external (remote) Emergency Power Off (EPO).
In case were needed to install a switch or button (EPO), the cable bridge that closes the circuit has to be removed from terminal strip
(X50).
Fig. 24. Terminals for connection of external push-button (EPO), property of the user
5. OPERATION
5-1. Start up
5-1-1. Control before start up
• Carefully make sure that all the connections have been made correctly and are sufficiently tight,
respecting the labeling of the device and the instructions of chapter «4.- Installation and wiring of
the unit».
• Check that the UPS switches and the batteries cabinet or cabinets are turned off (position «Off»).
• Be sure that all the loads are turned «Off».