Technical data

Technical Manual Cold Storage Controllers TKP / TKC x130 - x140Page 20
Roller Blind control
Selecting the „roller blind“ function on the assignment page activates
the relay output for opening and closing the roller blind(s)
automatically. A defrost overrides this function and opens the roller
blind(s) for the defrost period.
Internal control
• Therefore don’t use a digital input assigned with the function
„night settings“ or the digital input must be connected to mains
voltage (= day operation).
The timer parameters „ night setp ON “ and „ night setp OFF “
(mode page) are activating not only the secondary setpoint(s) but
have also an effect on the roller blind.
The ON setting activates the roller blind relay and runs the roller
blind in closed position via N/O-contact. The OFF setting time de-
activates the relay thus opening the roller blind again.
External control
• Therefore use a digital input and assign it to the function „ night
settings “. If the digital input is connected to mains voltage
(phase), the unit works in day-mode.
This results in de-energizing the relay when „roller blind“ is
selected and running the blind(s) open via the N/C-contact.
An open input means night-mode and runs the roller blind(s) shut
via the N/O-contact.
Frame Heater control
Frame heaters are used for freezers to avoid the door freezing onto
the door frame. In addition it prevents condensing water around the
door or on top of the frames of open chest freezers.
If one of the relays is assigned to „frame heater“ this will control the
energy to the frame heater with a certain frequency and pulse-width.
For day and night operation you can choose different values to save
energy.
The corresponding parameters on the mode page are:
• „
frame period “: defines the duration of the cycle,
• „ frame pulse day “ defines the percentage of heating during day
operation within each cycle.
100% = continuous heating, 0% = off
• „ frame pulse night “ defines the percentage of heating during
night operation within each cycle.
100% = continuous heating, 0% = off
roller blind rela
y
close
M
ext.
contact
open
L N
closed:
"day operation"
frame period
frame
pulse
OFF
ON
heater switches ON
heater switches OFF