Honeywell UDC3500 Product Manual page 45

Input #2
Input #3
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
1 3
source source
– –
100K 100K 3 3
(for Position Proportional Control or Three Position Step Contro (for Position Proportional Control or Three Position Step Control)
1 Remove the "R" terminal screw and install the C/J Sensor in its place. Connect the tang to the "−" terminal.
1
The 250 ohm resistor for milliamp inputs or the voltage divider for 0 -10 Volt inputs are supplied
with the controller when those inputs are specified. These items must be installed prior to start
This controller does not produce a steady current for burnout detection. For that reason, when a
2
up when the controller is wire d. For 0-20 mA applications, the resistor should be located at the
thermocouple is used in parallel with another instrument, it may be desirable to configure the burnout
transmitter terminals if Burnout detection is desired.
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.
2
Splice and tape this junction between the two thermocouples. Thi s junction may be located
anywhere between the thermocouples and the instrument terminals, it does not need to be close
The 250 ohm resistor for milliamp inputs or the voltage divider for 0 to10 Volt or –1 to 1Volt inputs are
3
to the other thermocou ple junctions. Both thermocouples must be of the same type. For bes t
supplied with the controller when those inputs are specified. These items must be installed prior to start up
accuracy, the two thermocouples should be matched or, preferably , made from the same batch
when the controller is wired. For 0-20 mA, -1 to 1 Volt and 0-10 Volt applications, the resistor should be
of wire.
located at the transmitter terminals if Burnout detection is desired.
This controller does not produce a steady current for burnout detection. For that rea son, when a
3
4 Splice and tape this junction between the two thermocouples. This junction may be located anywhere
thermocouple is used in parallel with another instrument, it may be desirable to configure the
between the thermocouples and the instrument terminals, it does not need to be close to the other
burnout selection for this controller to "NOFS" and use the burn out current from the other
thermocouple junctions. Both thermocouples must be of the same type. For the highest accuracy, the
instrument to also drive this controller.
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.
Input 3 is used to measure the Slidewire Input for Position Proportional Control.
6
10/05
RTD RTD
28 22 R R
23 29 + +
– –
30 24
Milliamps Milliamps
28 22 R R
– –
Xmitter Xmitter
1 3
+ +
+ +
23 29
250 Ω 250 Ω
Power Power
30 24 – –
+ + – –
Supply Supply
Slidewire Input Slidewire Input
4 6 4
Open Open
Wiper Wiper
Close Close
Figure 2-8 Input 3 Connections
UDC3500 Universal Digital Controller Product Manual
Millivolt or Volts except
0 to 10 Volts or –1 to 1 Volts
source source
28 22 R R
+ +
29 23 + +
mV or mV or
Volt Volt
– – source source
24 30
– –
Thermocouple Differential Thermocouple Differential
Use Thermocouple Use Thermocouple
extension wire only extension wire only
22 28 R R
+ +
23 29 + +
– –
2 4
– –
24 30 – –
5
+ +
22 28 R R
23 29 + +
– –
24 30
Installation
28 22 R R
+ +
29 23
30 24 – –
22 28 R R
23 29 + +
– –
30 24
xxxx
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