Mains Connection - Buderus EM10 Manual Del Usuario

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b) Power-based control
This control is activated if pins 1 and 3 are bridged. See
fig. 2, pos. 5 and the wiring diagram on page 47. The
EM10 transfers the 0-10 V signal to a power setpoint.
This is a linear ratio, see table 2.
Input
voltage
0 V - 0.5 V
0.6 V
5.0 V
10.0 V
table 2 Power-based control
*) The low-load power depends on the type of appliance. For
example, if the low load of the appliance is 20% and the
control signal is 1 Volt (= 10%), the target power is lower than
the low load. In this case, the appliance delivers 10% using an
On/Off cycle with low load operation. In this example, the
boiler starts heating continuously at low load from a setpoint
of 2 Volts.
Connecting several modules
It is possible to connect several different modules (e.g.
EM10 and VM10) to each other. To connect two or more
modules, the mains connection (fig. 4, pos. 2) and the EMS
connection (fig. 4, pos. 3) can always be interconnected.
Caution: This connection is polarity sensitive. The total
length of the EMS bus cable may be no more than 100 m.
Connecting the thermostat
Connect the Logamatic RC thermostat to the EMS
connection (fig. 4, pos. 3).

Mains connection

Connect the 230 V AC mains supply (fig. 2, pos. 1 and
fig. 4, pos. 1).
LED reports on the EM10 module (fig. 1, pos. 5)
LED status
green (permanent)
green (flashing)
red (short period)
red (constant)
Changes due to technical improvements reserved
14
Power setpoint
(boiler)
0
± 6%
± 50%
± 100%
Meaning
Everything is connected properly.
No communication with the boiler for at
least 5 minutes.
The power is connected to the boiler.
The EM10 is defective.
Status
Boiler
off
Low load *)
Partial load
Full load
1 2
fig. 4
Procedure
Reset the boiler.
If the reset doen't work, contact your installer.
See also the instructions for the boiler.
Contact your installer. See also the instructions
for the boiler.
Module EM10
3
2
Connect two modules with each other,
make mains connection.
Module EM10 • 01/2008
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