Controller functions
Version 1
RES-408
Page 43
11.10 "PREHEAT" signal
The heatsealing band can be heated to a specified preheat temperature with the "PREHEAT" function, in order to
shorten the heating time to the selected SET temperature in time-critical applications.
The preheat temperature is set with the "PH" [
P
re
H
eat] step in the Settings menu. The value selected for the pre-
heat temperature must be greater than 40°C. If not, the heatsealing band is not heated when the "START" signal
is activated or the "HAND" key is pressed. The 1…39°C setting range is not available on controllers manufactured
as of June 2006.
The "PREHEAT" signal is activated by applying a 24VDC signal at terminals 7+6.
The heatsealing band is heated to the preheat temperature if the "START" and "PREHEAT" signals
are active. In this case, the "PREHEAT" LED on the T-400 or T-408-1 terminal lights up.
The heatsealing band is heated to the set preheat temperature if the "HAND" key is pressed and the "PREHEAT"
signal is activated when the terminal display is in the home position. The "PREHEAT" LED then lights up. On con-
RES-408
max. 6mA
7
6
PREHEAT
+
-
GND
24VDC
PREHEAT
HIGH:
≥
12VDC
LOW:
≤
2VDC
!
"START"
signal
ACTUAL
temperature
"PREHEAT"
signal
24VDC
24VDC
T
2
T
1
T
1
= Preheat temperature (PREHEAT)
T
2
= Heatsealing temperature
t
t
t
0
0
0