American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 69)

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Appendix
Auxiliary connector J8 pinout
A.2 Auxiliary Connector J8 Pinout
The HI level and LO level contacts are provided for external use by the
customer. When a HI or LO level condition exists, the respective contact
pairs are closed. The HI and LO setpoints provide 0.05% hysteresis,
however the respective contact pairs still may “chatter” if the liquid
sloshes, bubbles, etc.
The HI level and LO level contacts also provide positive indication of a
power-off condition. With a power-off condition, both the HI level and LO
level contacts will be closed, which is a state unique to the power-off
condition.
The following table provides the specifications for the relay contacts:
Pin Function
1 Not used
2 4-20 mA current loop output
(optional feature)
3 0-10 VDC output
(optional feature)
4 Analog output common
5 & 6 Lo level relay contacts (dry)
7 & 8 Hi level relay contacts (dry)
9 Not used
Max switching VA 10
Max switching voltage 200 VDC
Max switching current 0.5 A
Max continuous current 1.5 A
Dielectric between
contacts
200 VDC minimum
J8
Pin 1