Unitronics Samba SM70-J-RA22 - Page 9

Samba™ PLC+ HMI
Unitronics
9
RTD
 PT100 (Sensor 0): use Input 9 and 10, related to CM signal.
 PT100 (Sensor 1): use Input 7 and 8, related to CM signal.
 4 wire PT100 can be used by leaving one of the sensor leads unconnected.
Analog Outputs
Relay Outputs
Increasing Contact Life Span
To increase the life span of the
relay output contacts and protect
the device from potential damage
by reverse EMF, connect:
 A clamping diode in parallel with each
inductive DC load
 An RC snubber circuit in parallel with each
inductive AC load