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Additional Considerations
When Measuring Resistance or Temperature (Rtd)
5
5-7
1211 13 14 15 16 17 18 19 20
21 345678910
SOURCE
(4-WIRE)
SENSE
(4-WIRE)
H L H LH LH LH LH LH LH LH LH L
H L H LH LH LH LH LH LH LH LH L
2-WIRE (2T) CONNECTION
RESISTANCE
OR
RTD SOURCE
USE H AND L TERMINALS FOR ANY CHANNEL.
• CHANNEL 0 ON FRONT PANEL
• CHANNELS 1 THROUGH 20 ON REAR
PANEL INPUT MODULE (CHANNEL 8 SHOWN HERE).
1211 13 14 15 16 17 18 19 20
21 345678910
SOURCE
(4-WIRE)
SENSE
(4-WIRE)
H L H LH LH LH LH LH LH LH LH L
H L H LH LH LH LH LH LH LH LH L
4-WIRE (4T) CONNECTION
RESISTANCE
OR
RTD SOURCE
USE H AND L TERMINALS FOR TWO CHANNELS ON REAR PANEL INPUT MODULE.
CONNECTIONS FOR CHANNEL 8 SHOWN HERE WITH CHANNEL 18 PROVIDING
ADDITIONAL TWO CONNECTIONS.
FOR EACH 4-WIRE CONNECTION, ONE SENSE CHANNEL (1 THROUGH 10) AND
ONE SOURCE CHANNEL (SENSE CHANNEL NUMBER +10 = 11 THROUGH 20) ARE USED.
oo16f.eps
Figure 5-2. 2T and 4T-Connections