Operator`s manual
4.4 Programming the Dry Contacts and the Clock
The UPS’s front panel contacts can be programmed to meet your specications with RS–232
communications. You can also adjust the UPS’s date and time.
4.4.1 Programming the Dry Contacts (Models 300 & 600 only)
The functions of dry contacts C1 and C2 can be changed with RS-232 communications.
For example, to change contact C1:
1. To see how it is currently programmed, type c1 (all lower case) and press ENTER.
2. The UPS responds with *c1=1 where the * shows the unit responded to your command.
A value of 1 indicates that it is programmed to be the On Battery indicator as shown in the
Dry Contact Conguration table below.
Dry Contact Conguration
1= On Battery 3= Timer 1 5= Fault 7= Timer 2
2= Low Battery 4= Alarm 6= Disabled 8= Timer 3
3. To change the contact, type c1=X where X is 1 to 8 and press ENTER.
The UPS responds with *c1=(1 to 8). The programming is done for that contact. Repeat as
necessary for the other contacts.
Each contact can only be programmed for one function at a time; it cannot show
multiple conditions.
4. To reset the contacts to the factory default (C1=On Battery, C2=Low Battery), type default
and press ENTER. The UPS responds with *default, showing it is reset.
Finished
Note: The timer contact closes after the UPS has been in battery mode for a pre-programmed
amount of time. The factory default setting is 2 hours (02:00:00 or 14,400 0.5 second steps)
but it can be set to a maximum value of 8 hours (08:00:00 or 57,600 0.5 second steps). You
can change the timer setting after the contact has been programmed to be a timer contact.
Enter command UPS display Description
Displaying
the Timer
timer and press Enter *timer=02:00:00 Returns the value of timer1
timer1 and press Enter *timer1=02:00:00 Returns the value of timer1
timer2 and press Enter *timer2=02:00:00 Returns the value of timer2
Doc# 017-221-B0 Rev 03/07 39
Communication