5.11.4 Door contact
Controller types UR 141 NE (NT) and UR 141 TE (LT)
With coldrooms, one or two 230 V digital inputs (terminals D21/D22 and D31/D32, factory setting) can each be
allocated as a coldroom door contact. Cooling and the evaporator fan are switched off when the coldroom door
is opened.
In the event of a permanently open door, an alarm is activated and the controller returns to cooling following the
elapse of the adjustable alarm delay time.
Conditions for switch-off
If the high temperature alarm setpoint (on coldroom sensor) is exceeded or if maximum door open time expires,
cooling and the evaporator fan will be restarted before the door closes. High coldroom air temperature (high
temperature alarm) also inhibits switch-off.
If the controller is operated with two zones and only the first 230 V input (Door Contact 1) is configured for
coldroom door monitoring, the door contact switch will stop cooling and the evaporator fan in both zones. The
same applies when only the second 230 V digital input is configured on Door Contact 2.
In single-zone operation the door contacts always act on first zone control. The only exception is when both 230
V inputs are set to door contact function, in which instance Door Contact 1 alone acts on control and Door
Contact 2 has no function.
DANGER
Warning - hazardous electrical voltage! Danger of electric shock! BEFORE and AFTER
connection it must checked that the 230 V AC digital inputs are off load! The controller and connected
voltage carrying components remain supplied with power!
Door Contact 1 can be activated via Digital Input 3 (terminals D31/D32). This requires Digital Input 3 to
be set as DOOR CONTACT (Menu 6-2-4) for the door contact to be available. Door Contact 2 can be
activated via Digital Input 2 (terminal D21/D22). This requires Input 3 to be set as DOOR CONTACT for
the door contact to be available.
The function of the two digital inputs can be configured via the parameter Inv. D2 (i.e. Inv. D3) in menu
6-2-4. 6-2-4 konfigurierbar. If the alarm delay is set to 0 minutes then the cooling and the evaporator
fan are not switched off and the alarm is immediately discharged.
No archiving takes place in the internal archive memory for the second door contact.
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