Sierra Wireless AirLink GX450 Hardware User's Manual page 40

AirLink GX450 Hardware User Guide
Figure 2-25: Digital Input Operation
AirLink GX gateway
I/O Circuit
Pins 3, 4, 11, and 12 are normally at 2.8 V,
but pulled low when activated
Figure 2-26: Digital Output Operation
Table 2-7: Digital I/O
Pins Name
3 DIO[2...5] Input low state voltage
(At or below this voltage, relay reads as low)
4 (as input)
11
Input high state voltage range
12 (At or above this voltage, relay reads as high)
Input leakage current at 5 V
Input leakage current at 12 V
Input leakage current at 24 V
DIO[2...5] Open drain drive to ground
(as output)
Maximum open circuit voltage applied
Rev. 11 July 2019
AirLink GX gateway
51 k
internal
pull up
I/O Circuit
Examples: Door opening/closing, valve opening/closing, ignition on/off, tow bar up/down,
empty/full container.
2.8 V
51 k
internal
pull up
Specification
2.8 V
Contact
Ground
Voltage supply
Flyback diode
Min
—
2.2
—
—
—
—
—
40
Contact closed
Digital 0
0 VDC to 1.2 VDC
Contact open
Digital 1
2.2 VDC to 30 VDC
CL+
CL-
External Relay Circuit
(Exact voltages and configuration
depend on the actual system design.)
Typical Max Units
— 1.2 V
— — V
0.05 — mA
1.8 — mA
5.5 — mA
100 — mA
— 30 V
COM
NC
NO
4114008