Figure 9 - 2-Wire Sensor - Honeywell 2MLF-RD4A User Manual

3. When extended lead wire is used in a 3-wire sensor, the lead wire is of same
specifications as that of the sensor (having similar thickness, length) for each of the
terminals.
4. The resistance of each conductor should be less than 10Ω. (A resistance of more
than 10Ω will cause an error.)
5. The difference in resistance of the conductors should to be less than 1Ω. (A
difference of more than 1Ω will cause an error.)
6. Length of the wire should be as short as possible and the wire should be directly
connected to the terminal block of 2MLF-RD4A without a connection terminal unit.
7. If a connection terminal unit is used, then the compensating wire should be
connected as shown below.
a) If 2-wire sensor is connected using (connection) terminal unit.
ATTENTION
1*: If sensor and compensating wire are shielded, connect shield line to FG
terminal of the module.
2*: If 2-wire sensor is connected, short the terminals B and b on the terminal
block of the module.
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide
September 2010
2.3. RTD input module characteristics
Figure 9 – 2-Wire sensor
Honeywell
2. Specifications
31