961-20A0-010 Datasheet, PDF (14/36 Pages) Magnetrol International, Inc. – Ultrasonic Single and Dual Point Level Switches

2.5.1.4 High/Low DIP Switch
The Hi/Lo Dip Switch is used to select whether the
Model 961 will be used as a high level fail-safe (HLFS)
switch or a low level fail-safe (LLFS) switch.
In the Hi position the DPDT process level relay will
de-energize (alarm condition) when the gap becomes wet.
In the Lo position the DPDT process level relay will
de-energize (alarm condition) when the gap becomes dry.
The table below provides assistance in configuring the
Hi/Lo DIP switch.
High/Low DIP Switch Configuration (Model 961 Line-powered)
Hi/Lo DIP
Gap
Level
Relay
Switch Condition Condition Contacts WET LED
LEVEL
LED
NC
Hi
(HLFS)
Dry
C
Off
On
NO
Normal Energized
NC
Hi
(HLFS)
Wet
C
On
Off
NO
Alarm De-energized
NC
Lo
(LLFS)
Wet
C
On
On
NO
Normal Energized
NC
Lo
(LLFS)
Dry
C
Off
Off
NO
Alarm De-energized
2.5.1.5 Independent/Joint DIP Switch
The I/J DIP switch is used to configure whether the SPDT
malfunction relay acts independently or jointly with the
DPDT process level relay. The factory default is for this
switch to be in the “I” position, where the relays act totally
independent of each other. If this DIP switch is in the “J”
position, both the SPDT malfunction relay and the DPDT
process relay will de-energize when a fault is detected.
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51-646 Echotel^® Model 961 & 962 Ultrasonic Level Switches