SOR Multi Point RF Level Switch - Manual (Page 29)

Form 677 (05.13) ©SOR Inc. 29/36
Output Relay Wiring
Before connecting output relays to external devices, determine which failsafe mode is best
suited for each sensing level. Refer to the continuity chart below when connecting to relay
terminal strips.
For set point 1 & 4:
LO mode: When the set point is satisfied, the relay turns on. When process level falls below
the set point, the relay turns off and remains off until the set point is once again satisfied.
HI mode: When the set point is satisfied, the relay turns off. When process level falls below
the set point, the relay turns on and remains on until set point is once again satisfied.
For the adjustable differential set point:
LO mode: When the upper limit is satisfied, the relay turns on. When process level falls below
the lower limit, the relay turns off and remains off until the set point is once again satisfied.
HI mode: When the upper limit is satisfied, the relay turns off. When process level falls below
the lower limit, the relay turns on and remains on until the upper limit is once again satisfied.
Switch
Position
Set Point
Status
Relay
Coil
Relay Continuity
Failsafe
LO/HI
OFF
ON
NC1 C1 NO1 NO2 C2 NC2
NC1 C1 NO1 NO2 C2 NC2
NC1 C1 NO1 NO2 C2 NC2
NC1 C1 NO1 NO2 C2 NC2
ON
OFF
Failsafe
LO/HI
Set
Point
Set
Point
Set
Point
Set
Point
Time Delay Adjustments
Set points 1 and 4 may be equipped with time delay adjustments. Both on delay and off
delay are one turn pots.
On Delay: Length of time that set point must be satisfied before the output relay reacts.
Off Delay: Length of time that process must be below set point before the output relay reacts.
Adjustment pot fully CCW = 0-second delay
Adjustment pot fully CW = second delay (approximate)