26
10. Switching value settings
Standards 12953-10 and 12952-12 specify requirements for boiler water and
feed water according to the permissible operating overpressure.
limiter:
The limit value must be defined and set (menu 2.7).
The value for the return to normal operating mode must be defined and set (menu 2.6)
The relay is actively energised in normal operating mode (contacts 3-4 closed).
The red limit LED lights up if the limit value is exceeded.
controller:
The limit value must be defined and set (menu 2.7).
The value for the return to normal operating mode must be defined and set (menu 2.6)
The relay is inactive in normal operating mode (contacts 3-4 open). If the limit value is
exceeded, the relay becomes active and can thus control a valve.
The blue Valve LED lights up if the limit value is exceeded.
The setting is described in chapter 7.4
11. Technical Data
11.1 Device data - Controller
Power supply
24 V DC
Art. no.: 20-10031
100
– 240V / 50 – 60 Hz
Art. no.: 20-10027
Power consumption
3,0 W
3,0 VA
Device fuse
Relay fused with 4A
Protection type as per DIN EN 60529
IP40
1)
Allowable ambient temperature
0
– 55°C
1)
according to EN 12953-9 // EN 12952-11, 4.3.4, protection class IP54 must be ensured in the boiler area. Installation in a control cabinet is
required.
11.2 Device data - Contacts
Current interface
Output current (active)
4 mA ... 20 mA
(not galv. isolated)
Load
max. 500 Ω
Limit and additional
relays
Switching voltage
(max.)
250 V AC
25 V DC
Switching current
(max.)
4 A ohmic
Inductive / capacitive / higher loads:
use contactor
Caution
Summary of Contents for FARB2
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