FW_F112A_v1702_02_EN
Page 32
Explanation Intrinsically safe options:
Type AF
– Intrinsically safe floating 4-20mA analog output:
A floating 4-20mA signal proportional to the flow rate is available with this option. When the output is
disabled, a 3.5mA signal will be generated. Max. driving capacity 1000 Ohm @ 30V DC.
Fig. 23: Terminal connections - Intrinsically safe floating 4-20mA analog output (typical)
For type PD-XI:
It is possible to supply the sensor with different voltages. You can set the voltage
with the switches. Internal power is only applicable for low power sensors (Coil, Reed). The sensor
supply is set by the firmware: 1.2V DC or 3V DC. External power is only available when the main
external power supply is connected. The sensor supply voltage is fixed: 8.2V DC.
Set the sensor supply
1. Make the F112-P safe. If applicable, mind the battery power.
2. Open the F112-P and carefully remove the cable-connectors and the protective cover.
3. Find and set the switches and select the V
out
as required.
4. Close the protective cover and install the cable connectors.
5. Close the F112-P.
Risk of electrocution - High voltage!
Make sure, all the leads to the terminals are disconnected from the F112-P and NEVER
connect the mains power supply to the unit when the protection cover has been removed!
Type PD-XI
Power supply in:
16-30V DC / max. 1W
Switch location (typical)
Sensor
Sensor supply out
A
1
2
off
-
Coil 1.2V DC; <1mA
Reed 3V DC; <1mA
on
-
8.2V DC; 7mA (max)
Fig. 24: Switch position voltage selection type PD-XI
