Addressable Radio Link System
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10
4. POWERING S2000R-ARR32
The S2000R-ARR32 is powered in one of the following ways:
1. Via the polling loop of the connected polling loop controller;
2. By external DC power supplies;
3. Via the USB port when the S2000R-ARR32 is connected to a personal computer for
configuring.
The S2000R-ARR32 can be in one of the two power modes defined by current position of the DIP
switch S3.1 (see Figure 3-1) as shown in Table 4-1.
Table 4-1. Power Modes of the S2000R-ARR32
Power Mode
Current Consumed via Polling Loop
S3.1 Switch Position
Via the polling loop
Up to 22.5 mA
Off
By external power supplies
0 mA under normal conditions
On
5.7 mA max in case of a failure of the
external power supplies
Being powered via the polling loop the ARR32 consumes up to 22.5 mA from the polling loop
regardless of the number of radio link devices connected to this one. When the ARR32 is operated in
this power mode, external power supplies typically are not in use, their voltage values are not
monitored, and their conditions are not indicated.
If you select powering the ARR32 via the polling loop please be sure that total current
consumption of the devices brought in the polling loop doesn’t exceed the allowed value
(see S2000-KDL Manual)
Being powered by external power supplies connected to the
Х
2 terminals (see Figure 3-1)
normally the ARR32 is not powered via the polling loop. In this power mode the ARR32 monitors for
voltage of the external power supplies which should be in the range of 9 to 28 V.
If no power is applied to the main or backup power input or when the power voltage is out of the
acceptable range, the S2000R-ARR32 indicates a power failure (see Section 5).
When both external power supplies fail the S2000R-ARR32 switches to a power failure mode. In this
mode the S2000R-ARR32 sends the polling loop controller a power failure message and remains
functional consuming up to 5.7 mA via the polling loop, with the transceiver being off and
communications with the radio link devices being stopped.