10
ITA-6
ITA-6 rev.02
Identification Numbers & End of Line Jumpers
Each Comlink-2 card used to communicate parameters between ITA-6 units
and the main controller must have a unique identification number. This
number is configured using jumpers on the card and should be assigned
before plugging the card into each unit. To do this, use the three jumpers
(marked X100, X10 and X1) on the card (i.d. numbers can go from 0 to
199). Use X1 for units, X10 for tens and X100 for hundreds. In each
case, place the black jumper horizontally over the two pins corresponding
to the digit required.
The ITA-6 network operates on two communication lines. One line links
the ITA-6 units together to the main controller and the other line links
temperature controllers to a computer (this second line is optional). Two
jumpers on the Comlink-2 card are used to identify the end of line for each
communication line. The ITA-6 communication line uses jumper JP5 and
the computer line uses JP4. Use pins 2 and 3 for YES and pins 1 and 2 for
NO. The following diagram shows a typical connection with the appropri-
ate jumper configurations.
END OF LINE
JUMPERS
ID JUMPERS
27
ITA-6
ITA-6 rev.02
Temperature Alarms
Low Temperature Alarm:
The alarm contact is activated when the room temperature drops below
"temperature set point
-
low alarm offset" as shown below. The Lo Offset
is the temperature difference from the set point below which a low tem-
perature alarm is set off. It can be adjusted from 0.5°F to 20°F (0.3°C to
11.1°C). Note that internal switch #4 must be set to ON for this alarm to
be detected.
High Temperature Alarm:
The alarm contact is activated when the room temperature exceeds "tem-
perature set point + high alarm offset" as shown below. The Hi Offset is
the temperature difference from the set point above which a high tem-
perature alarm is set off. It can be adjusted from 0.5°F to 40°F (0.3°C to
22.2°C). Note that internal switch #4 must be set to ON for this alarm to
be detected.
SET POINT
HI
O
FFS
E
T
LO OF
F
S
ET
TEMPERATURE
TIME
HI TEMPERATURE
ALARM
LO TEMPERATURE
ALARM
