ECM NH3 5250, Instruction Manual, Page: 29 / 62

25
General Specifications
 Power
DC:
11 to 28 VDC
Current Draw: 0.5 A (display), 1.2 A steady-state (NH
3
sensor and module),
On start-up, NH
3
sensor and module may draw as much as 4 A for 30 s.
Case Ground: The NH
3
5250 display head case is connected to power ground via a
2.15 kΩ resistor.
 Key-on Signal
“ON” Voltage Level: 2.7 to 32 VDC
Current Draw: 100 µA
 Environment
Display Head: -40 to 85 °C, 100% humidity non-condensing, display head is not sealed
Module: -55 to 125 °C, 100% humidity, module is sealed, IP67
 Dimensions and Weight
Display Head: 108 mm x 64 mm x 178 mm, 4 ¼” x 2 ½” x 7", (W x H x D)
676 gm, 24 oz
Module: 120 mm x 37 mm x 143 mm, 4 ¾” x 1 ½” x 5 ¾”, (W x H x D)
244 gm, 8.7 oz