3 General safety information
Read these operating instructions before using the OTT netDL for the first time!
Become completely familiar with the installation and operation of the OTT
netDL and its accessories!
Note any additional information on dangers given within the individual work
steps.
Only use the OTT netDL and its accessories in the manner described in these
operating instructions.
Make sure that the installation site is sufficiently protected against moisture
(IP 41 type of protection)!
Select the installation site so that the ambient temperature never exceeds or
falls below the allowable temperature range of –40 °C to +70 °C (for device
versions B... and C... : –30 °C to +70 °C)!
Install the OTT netDL in a closed control cabinet or in a fire protection cabinet!
If the power supply of OTT netDL is a low power source (LPS), this is not
necessary.
Do not open the OTT netDL unit! Sensors, communication equipment, power
supply, switching contacts, or additional components are connected only
through the screw terminal strips/9-pin Sub-D connectors accessible from
outside.
Operate an OTT netDL unit with built-in GSM modem (device versions B...
and C...) only with the GSM cellular radio antenna connected.
Minimum clearance between antenna and unit: 20 cm!
Before connecting the power supply, check that all wires are properly attached
to the screw terminal strips and/or 9-pin Sub D connectors.
It is essential to comply with the electrical limits given in the "Technical Data"
section.
Connect the OTT netDL only to a power supply providing less than 28 V
D
C
.
Protect the feed line of the supply voltage with a safety fuse (10 A /fast)!
Always use a galvanically isolated safety extra-low voltage (SELV) for
mains supply.
Do not make any changes or retrofits to the OTT netDL!
Have a defective OTT netDL checked and repaired by the OTT repair center.
Under no circumstances carry out any repairs yourself.
Please note: With a nearly full data memory in the OTT netDL
unit, it may take a few minutes after an interruption of the oper-
ating voltage until communication is possible again!
7
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