Em10 Fault Message Module - Buderus Logamax plus GB162 Technical Manual

4.5.8

EM10 fault message module

The EM10 fault message module can be used as an
interface between the gas condensing boiler and, for
example, building management systems.
A 0–10 V DC signal enables control via the flow
temperature or the output (
Combined with the Logamax plus GB162, the EM10 fault
message module provides two standard functions:
• Output of a fault indication with a 230 V signal (with
potential) (buzzer, signal lamp, max. 1 A) and a floating
contact for LV signals.
A fault indication is generated by one of the following
causes:
– The gas condensing boiler has suffered a lockout
fault
– The water pressure in the system is too low
– Communication with the gas condensing boiler has
been interrupted for longer than five minutes
– Switching the gas condensing boiler with an
external 0-10 V DC signal. A flow temperature is
specified for the gas condensing boiler via the
0–10 V DC signal (graph
Only one of the two fundamental functions can be used.
T (°C)
V
100
80
60
40
20
0
0 2
7 747 009 801-24.1il
Fig. 34 Curve, EM10 fault message module (set
values)
T Flow temperature
V
U Input voltage
6 720 645 821 (2010/09) – Logamax plus GB162
fig. 34).
fig. 34).
4 6 8
U (V)
Control via the flow temperature
The EM10 module transmits the 0–10 V signal from the
building management system to a set flow temperature.
This is a linear ratio (
Input
voltage
[V]
0
0.5
0.6
5
10
Table 13 Control via the flow temperature
Control via the output
The EM10 module transmits the 0–10 V signal from the
building management system to a set output. This is a
linear ratio (
Input
voltage
[V]
0
0.5
0.6
10
5
10
Table 14 Control via the output
1) The output at low load depends on the appliance type. If the low
load of the appliance is, for example, 20 % and the control
signal 1 V (= 10 %), then the set output is lower than the low
load. In that case, the appliance will deliver 10 % at low load
through an ON/OFF cycle. In this example, the appliance enters
constant operation from a set value of 2 V.
The set temperature control function via
0–10V it only appropriate in single boiler
systems.
This function can only be used for set
temperature control in multi boiler systems
with the Logamatic 4000 and the FM458
module.
Heating control
tab. 13).
Set flow temperature
(gas condensing
boiler)
[ °C]
0
0
± 15
± 50
± 90
tab. 14).
Set output (gas
condensing boiler)
[ °C]
0
0
± 6
± 50
± 100
4
State of the
gas
condensing
boiler
OFF
OFF
ON
ON
ON/maximum
State of the
gas
condensing
boiler
OFF
OFF
1)
Low load
Partial load
Full load
41