Endress+Hauser Ceraphant PTP31B - HNO no Contact for Hysteresis Function

Ceraphant PTP31B, PTP33B Description of device parameters
Endress+Hauser 55
Description To prevent constant switch-on and switch-off if values are around the switch point "SP1/
SP2" or the switchback point "RP1/RP2", a delay in a range of 0 – 50 seconds, to two
decimal places, can be set for the individual points.
If the measured value leaves the switching range during the delay time, the delay time
starts again from scratch.
Example • SP1/SP2 = 2 bar (29 psi)
• RP1/RP2 = 1 bar (14.5 psi)
• dS1/dS2 = 5 seconds
• dR1/dR2 = 2 seconds
dS1/dS2: ≥2 bar (29 psi) must be present for at least 5 seconds for SP1/SP2 to become
active.
dR1/dR2: ≤1 bar (14.5 psi) must be present for at least 2 seconds for RP1/RP2 to become
active.
2
1
0
SP1/SP2
RP1/RP2
dS1
dS2
dS1
dS2
dR1
dR2
0
HNO
p
t
1
HNC
A0022944
0 0-signal. Output open in quiescent state.
1 1-signal. Output closed in quiescent state.
2 Hysteresis (difference between the value of the switch point "SP1/SP2" and the value of the switchback point
"RP1/SP2")
HNO Closing
HNC NC contact
SP1/
SP2
Switch point 1/2
RP1/
RP2
Switchback point 1/2
dS1/
dS2
Set time for which the specific switch point must be reached continuously without interruption until an
electrical signal change takes place.
dR1/
dR2
Set time for which the specific switchback point must be reached continuously without interruption until an
electrical signal change takes place.
Value at switch-on 0
Input range 0.00 - 50.00 seconds
Factory setting 0
HNO NO contact for hysteresis function