Winland Electronics EA800-ip - Manual (Page 16)

16 D-011-0152
Sensors
Humidity Sensors
Table 6 lists the humidity sensors available for use with the EA800 Alarm System.
4-20mA Sensors
Theory of Operation
Industry standard 4-20mA sensors can be used with the EA800. However, it is important to verify that this type of
sensor will operate properly over the entire output range.
Figure 6 shows an example of the loop circuit for a 4-20mA sensor whose minimum operating voltage is 8V or less
when connected to an EA800 console that is powered with 12VDC.
Figure 6 4-20mA Sensor Wiring Diagram - EA800 Aux Power Supply
Figure 7 shows an example of the loop circuit for a 4-20mA sensor whose minimum operating voltage is greater
than 8V when connected to an EA800 console that is powered with 12VDC.
TEMP-UL-S Thermistor stainless steel probe,
ultra low temperature sensor
-112° F to 32° F
(-80° C to 0° C)
EA-WTS Stand alone wireless temperature
sensor. NOT for use in coolers or
freezers
32° F to 122° F
(0° C to 50° C)
Table 6 EA800 Compatible Humidity Sensors
Model Number Description Operating Range/Parameters
HA-III+ Wired humidity sensor 5 to 95% RH
(non-condensing)
EA-WHS Wireless humidity sensor 5 to 95% RH
(non-condensing)
Table 5 EA800 Compatible Temperature Sensors — continued
+
DC
+
-
4.0V
200
ohms
Aux Power
J5
+
(-)
+
(-)
Input N
J6
+
-
Vsensor
4-20mA
Transmitter
EA800 If Vsensor ” 8V and Aux Power = 12V
Note: Wiring shown inside this box
is internal to EA800.
No additional wiring is required.
Max load of 200
ohms includes
1000 ft. (304.5
m) of 22 AWG
(2-conductor)
wire connecting
the EA800 to the
4-20mA sensor