YSI 5200 - Manual (Page 82)

YSI Incorporated 80 5200 Recirculating System Monitor
2. Connect the switch to Auxiliary Input #1 or Auxiliary Input #2 using the 3-pole YSI 065942UL
Pluggable Socket Connector. See Figure 8-1.
Connect one wire to the ground (GND) terminal and the other to the In 1 or In 2 terminal.
NOTE: When connecting a switch to Auxiliary Input #2, set the input to Digital mode. See
Section 9.4.2 Input #2.
3. Set the 5200 to either Alarm on Open or to Alarm on Closed, depending on the type of switch
used. See Section 9.4.1 Input #1, Control.
IN 2
--
IN 1
--
GND--
Figure 8-1 Float Switch Wiring
8.2.2 Example (User Defined)—Connecting an Instrument
1. Connect the instrument to Auxiliary Input #2 using the 3-pole YSI 065942UL Pluggable Socket
Connector. See Figure 8-2.
2. Connect the negative wire to the ground (GND) terminal and the positive wire to the In 2
terminal.
3. For a 4–20mA input, connect a 250 Ω resistor between the ground (GND) and positive In 2
terminals. See Figure 8-2.
4. Set Auxiliary Input #2 to User Defined mode and select the correct scale (0–1 VDC, 0–5VDC, or
4–20mA). See Section,9.4.2 Input #2.