Honeywell UDC3500 Product Manual page 43

Input #2
Input #1
Thermocouple Thermocouple
Use Thermocouple Use Thermocouple
extension wire only extension wire only
3 1
3 2
0-10 Volts or –1 to 1 Volts
+ +
1 1
100K 100K
Volt Volt 2 2
3 1
source source
– –
100K 100K 3 3
1
Remove the "R" terminal screw and install the C/J Sensor in its place. Connect the tang to the "−" terminal.
This controller does not produce a steady current for burnout detection. For that reason, when a
2
thermocouple is used in parallel with another instrument, it may be desirable to configure the burnout
selection for this controller to "NOFS" and use the burnout current from the other instrument to also drive
this controller. The Failsafe Output must be set to ensure proper operation when the thermocouple fails.
The 250 ohm resistor for milliamp inputs or the voltage divider for 0 to10 Volt or –1 to 1Volt inputs are
3
supplied with the controller when those inputs are specified. These items must be installed prior to start up
when the controller is wired. For 0-20 mA, -1 to 1 Volt and 0-10 Volt applications, the resistor should be
located at the transmitter terminals if Burnout detection is desired.
Splice and tape this junction between the two thermocouples. This junction may be located anywhere
4
between the thermocouples and the instrument terminals, it does not need to be close to the other
thermocouple junctions. Both thermocouples must be of the same type. For the highest accuracy, the
thermocouples should be matched or, preferably, made from the same batch of wire.
The millivolt values for the Thermocouple Differential Input are for a pair of J thermocouples at an ambient
5
temperature mean of 450°F / 232°C. Cold Junction Compensation is not required for this input type.
10/05
RTD RTD
34 22 R R
23 35 + +
– –
36 24
Milliamps Milliamps
34 22 R R
– –
Xmitter Xmitter
3 1
+ +
+ +
35 23
250 Ω 250 Ω
Power Power
24 36 – –
+ + – –
Supply Supply
Figure 2-6 Input 1 Connections
UDC3500 Universal Digital Controller Product Manual
Carbon, Oxygen, Millivolt or Volts
except 0 to 10 Volts or –1 to 1 Volts
34 22 R R
+ +
35 23 + +
mV or mV or
Volt Volt
– – source source
36 24
– –
Thermocouple Differential Thermocouple Differential
Use Thermocouple Use Thermocouple
extension wire only extension wire only
34 22 R R
+ +
23 35 + +
– –
2 4
– –
24 36 – –
5
+ +
Installation
34 22 R R
+ +
35 23
36 24 – –
22 34 R R
23 35 + +
– –
36 24
29