YSI 5200 - Manual (Page 103)

YSI Incorporated 101 5200 Recirculating System Monitor
9.3.1 Example—Wiring a Contactor
The 5200’s internal relays are not intended to switch heavy loads above the current rating of the relay
(see Section 15 System Specifications for relay specifications). Heavy loads require installing a separate
external relay (contactor) between the 5200 and the load. Figure 9-8 shows a typical connection of the
5200 and a load using a contactor.
NOTE: Make sure that the contactor meets the electrical requirements of the load.
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Figure 9-8 Wiring a Contactor