SATEL ETHM-2 3
3. I
NSTALLATION
Disconnect power supply before making any electrical connections.
The ETHM-2 module is designed for indoor installation, in spaces with normal humidity of air.
The module can be supplied with alternating or direct voltage.
3.1 CONNECTION OF ALTERNATING VOLTAGE
If the module is to be supplied with 16 V AC (±10%), it is recommended that a 20 VA
transformer be used. The transformer should be permanently connected to the 230 V AC
mains power supply. Therefore, prior to making any cable connections, familiarize yourself
with the site electrical installation. The circuit to be chosen as power supply circuit is to be
alive at all times and provided with suitable protection.
Never connect two devices with power supply unit to one transformer.
Before cutting in the transformer to the circuit from which it will be power
supplied, deenergize the circuit.
Because the ETHM-2 module has no switch to disconnect the mains power
supply, it is important that you advise the owner / user of the equipment on how
it should be disconnected from the mains (e.g. by indicating the fuse which
protects the power circuit of the module).
Use a 12 V/7 Ah battery as an emergency power supply source for the module.
1. Connect AC voltage from the transformer secondary winding to the module AC terminals.
2. Switch on 230 V AC power supply in the circuit to which the transformer is connected.
Measure the voltage across the battery leads (the correct value should be between 13.6
and 13.8 V DC).
3. Switch off 230 V AC power supply.
4. Connect the battery. The module will not start on connecting the battery alone.
5. Switch on 230 V AC power supply. The module is now ready for operation.
Notes:
A battery voltage drop below 11 V for longer than 12 minutes (3 battery tests) is
recognized as battery discharge. The further voltage drop to approx. 9.5 V will disconnect
the battery.
Additionally, if the module is supplied with AC voltage and the control panel dialer is
connected to the TIP and RING terminals, the COM terminals in panel and module must
be shorted. Thus will prevent the situation when simulating telephone line trouble by the
module fails to be correctly recognized by the control panel.
3.2 CONNECTION OF DIRECT VOLTAGE
If the module is to be supplied with 12 V DC (±15%), the power supply can be provided e.g.
from the alarm control panel, which is to be monitored by means of the module. The power
supply and common ground cables should be connected to the corresponding module
terminals (+12V and COM). Turn on power supply to make the module ready for operation.
4. M
ODULE CONFIGURATION
Note: The device is only designed for working in the local computer networks (LAN).
It cannot be directly connected to the public computer network (MAN, WAN).
Connection to the public network should be established by using an xDSL router or
modem.
