Secutech Radio modules ST002039 Data Sheet
Product codes
ST002039
Seite 18
Security & Electronic Technologies GmbH
Open the housing. Avoid the intrusion of moisture and pollution while the in-
strument is open to maintain the reliability!
strument is open to maintain the reliability!
1. Turn on the power supply of the device
2. Press the B-button two times shortly
3. The green RF-LED will blink several times, the number of light pulses
2. Press the B-button two times shortly
3. The green RF-LED will blink several times, the number of light pulses
gives the actual number of frequency block (1-8).
4. The light pulses are repeated after a 1 s pause. Each press on button
A increments the block number by 1. On the end of the range the
block number falls back from 8 to 1 automatically.
block number falls back from 8 to 1 automatically.
5. An interruption of the power supply aborts the procedure, the original
block number remains in memory; the actual one is not stored.
6. The procedure can be finished by pressing the B-button; the actual
block number is stored permanently.
7. Repeat this procedure for the next device to set the same block
number.
If required you may check the block number using steps 1 to 4 as described
above..
Operation of the equipment
The devices SD 420L, SD 421L, SD 1420L and SD1421L supplies the pas-
sive 4-20mA probe and permanently measure the current signal with high ac-
curacy and resolution (12- or 16-bit).
The central SD 1232L or SD 232L receives directly from the PC (over RS232)
or over a modem commands to request a SD (1)42xL and sent the values of
alarms to it.
The SD (1)232L sends this information to the requested device and gets the
digital measured current value back.
Both alarm levels will stored permanently in the SD (1)42xL, so the alarm re-
lay is working also if the radio link is broken (e.g. the PC is shut down).
The SD (1)232L sends the received mA values to the PC. The PC calculates
the volume and the level of the tank .