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8.3.3 Modem programming procedure
Smart modem (SM) is the one connected to PC, and NULL Modem (NM) is the one connected to the UPS.
Standard Hayes AT programming language is the suitable language for modems. In usual applications a
modem which uses AT command set should be selected.
8.3.3.1 SMART Modem Programming (PC modem)
The connected modem to PC (smart modem) will be programmed from UPS control software automatically.
B0 E1 F1 M1 Q0 V1 X3
BAUD = 2400 PARITY = N WORDLEN = 8
DIAL = TONE (TONE which can be programmed)
&A3 &B1 &C1 &D0 &H1 &I0 &K1 &M4
&N0 &R2 &S0 &T5 &Y1
8.3.4 Modem –UPS Connection Cable
The connection cable between NULL modem and UPS is configured as follows:
UPS
DB9 female
MODEM
DB25 male
6 3
7 7
9 2
8.4 Dry Contact (Interface) Connections
Some important events of the UPS can be monitored or controlled by these connections. There is a relay for
each event, which is located on the interface board. The NC-C-N0 contacts of each Relay are available at the
Interface Board output terminals.
These events are:
• LINE FAILURE
• BATTERY LOW
• LOAD ON BYPASS
• BATTERY CB input
• BATTERY CB output
• EMERGENCY STOP input
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