Firmware V3.15
21.04.2021
65/401
5.9 Door contact
Controller types UR 141 NK (NT) and UR 141 TK (LT) only
With coldrooms, one or two 230 V AC digital inputs (terminals D21/D22 and D31/32, factory setting) can each
be allocated as a cold-room door contact. Cooling and the evaporator fan are switched off when the cold-room
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 cold-room sensor) is exceeded or if maximum door open time
expires, cooling and the evaporator fan will be restarted before the door closes. High cold-room air temperature
(high temperature alarm) also inhibits switch-off.
If the controller is operated with two zones and only the first 230 V digital input (Door Contact 1) is configured
for cold-room 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 digital inputs are set to door contact function, in which instance Door Contact 1 alone acts on control and
Door Contact 2 has no function.
Warning - hazardous electrical voltage! Danger of electric shock! BEFORE
connecting and
disconnecting it must be 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 the digital input 3 (terminal D31/32). 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 (terminals 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. 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.
Содержание UA 400
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