Installation
26 UDC3500 Universal Digital Controller Product Manual 3/07
Table 2-7 Dual Loop Controller – Loop 2 Output Functionality and
Restrictions
Loop 2 Output
Algorithm
Selection
Output #2
Option
Function of
Output #2
1st Current
Output
2nd Current
Output *
Relay #3 Relay #4 Relay #5
Third Current
Output
NUL2 NUL2 NUL2 Loop 2
HEAT
Alarm 2 Alarm 1 Time Simplex or
ON-OFF Simplex
All Other
Options
NUL2 NUL2 NUL2 Loop 2
HEAT
Alarm 2 Alarm 1
Third Current
Output
NUL2 NUL2 NUL2 Loop 2
HEAT
Loop 2
COOL
Alarm 1 Time Duplex or
ON-OFF Duplex
All Other
Options
NUL2 NUL2 NUL2 Loop 2
HEAT
Loop 2
COOL
Alarm 1
Third Current
Output
Loop 2 HEAT NUL2 NUL2 Alarm 3 Alarm 2 Alarm 1 Current Simplex
All Other
Options
NUL2 NUL2 Loop 2
HEAT
Alarm 3 Alarm 2 Alarm 1
Third Current
Output
Loop 2 HEAT
and COOL
NUL2 NUL2 Alarm 3 Alarm 2 Alarm 1 Current Duplex
100 %
Second or Third
Current Out =
COOL and HEAT
All Other
Options
NUL2 NUL2 Loop 2
HEAT and
COOL
Alarm 3 Alarm 2 Alarm 1
Third Current
Output
Loop 2 HEAT NUL2 Loop 2
COOL
Alarm 3 Alarm 2 Alarm 1 Current Duplex
50 % ***
Second Current =
HEAT
Third Current =
COOL
All Other
Options
N/A2 N/A2 N/A2 N/A2 N/A2 N/A2
Third Current
Output
Loop 2 COOL NUL2 NUL2 Loop 2
HEAT
Alarm 2 Alarm 1 Current/Time
Second or Third
Current = COOL
Time = HEAT
All Other
Options
NUL2 NUL2 Loop 2
COOL
Loop 2
HEAT
Alarm 2 Alarm 1
Third Current
Output
Loop 2 HEAT NUL2 NUL2 Loop 2
COOL
Alarm 2 Alarm 1 Time/Current
Time = COOL
Second or Third
Current = HEAT
All Other
Options
NUL2 NUL2 Loop 2
HEAT
Loop 2
COOL
Alarm 2 Alarm 1
NUL2 = N ot Used on Loop 2 – This particular output is not used for the selected Second Loop
Output type, but it may be used for the First Loop Output type. Refer to the selection made
in
Table 2-6. Any Current Output not used as a Control Output on either loop may be
configured as an Auxiliary Output.
N/A2 =
Current Duplex 50% is N
ot Available on Loop 2 unless the Third Current Output is
installed.
* The Second Current Output and Ethernet Communications are mutually exclusive.
** TPSC and Position Proportional are available only on Loop 1.
*** Current Duplex 50% is available only on Loop 1 or Loop 2, it cannot be used on both loops. If the
Second Current Output is not present, then the Third Current Output is used as Loop 1 COOL output.
To Next Page
Loading...
