Mains Connection - Buderus Logamatic EM10 Manual Del Usuario

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b) Power-based control
This control is activated if pins 1 and 3 are bridged
( fig. 2, [5] and the wiring diagram on page 46).
The EM10 defaults a percentage output via the 0-10 V
signal from the control unit,
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 (
EMS connection (
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
B Connect the Logamatic RC thermostat to the EMS
connection ( fig. 4, [3]).

Mains connection

B Connect the 230 V AC mains supply (
and fig. 4, [1]).
LED reports on the EM10 module (
LED status
green (permanent)
green (flashing)
red (short period)
red (constant)
14
tab. 2.
Power setpoint
(boiler)
0
± 6 %
± 50 %
± 100 %
fig. 4, [2]) and the
fig. 4, [3]) can always be
fig. 1, [5])
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
fig. 2, [1]
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 – 6 720 802 632 (2012/03)
3