Weidmuller WI-I/O 9-K: Wireless I/O Transmitter v1.9 - Manual (Page 9)

User Manual v1.9
Manual WI-I/O 9-K v1.9 Page 9
Digital Signals
Examples: motor fault, tank overflow, intruder alarm
Pulse signals - use the same input as the digital input
Examples: electricity metering, fluid flow, rain gauge, level from a shaft encoder
Analog continuously variable signals (0-20mA, 4-20mA, 0-10mA, 0-10V)
Examples: measured tank level, measured process temperature
Some internal signals may also be transmitted to outputs in the network:
• Setpoint Status (digital signal set or reset depending upon the value of the analog signal
compared to a high and a low setpoint value configured in the WI-I/O K)
• Supply Low Voltage (digital signal set when supply voltage is low).
• Supply Voltage (analog value)
• Pulse Rate (analog value proportional to rate of pulse input - available for both pulse inputs)
1.2 Power Supply
The power consumption of the WI-I/O K is very small as it conserves power by reverting to
“sleep” mode between transmissions. The WI-I/O K can be powered from a 6 - 30 VDC supply.
An optional 9VDC battery pack, the WI-BP-I/O-9-K is available to power the WI-I/O K. The
battery supply uses six AA alkaline batteries. More than one WI-BP-I/O-9-K battery pack can be
connected together to supply a WI-I/O K. Other battery supplies can also be used to power the
WI-I/O K, including a solar panel supply.
The WI-I/O K unit provides an internal alarm on low supply voltage - this alarm may be
transmitted by radio for warning purposes. The user can configure the voltage at which the low
voltage alarm activates.
The WI-I/O K generates a 24VDC, 50mA supply for powering the analog loop. This supply is
designed to power an analog loop only and should not be used for any other purpose.
1.3 Radio Transmitter
The WI-I/O K has an internal frequency hopping radio transmitter that operates on a unlicensed
radio channel at 900 MHz. A radio licence is not required for the WI-I/O K in USA, Canada,
Australia, New Zealand and some other countries.
It is suitable for use in utility industries such as electricity, water and gas, as well as a cost
effective solution for short range applications in factories and industrial plants.
To extend radio range, WI-I/O 9-x modules can be used as repeaters. Up to five repeaters can