CT34002a_e.doc / Nov-15
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9.
Appendix for model CT 641
9.1.
Relay Outputs
While model CT340 provides high-speed transistor outputs only, model CT641 provides four
additional relay outputs, operating in parallel to the high-speed transistor outputs K1 – K4.
All electrical connections of CT 641 are fully similar to CT 340, except that with CT 641 models
the back plane is equipped with an additional terminal strip X3 providing the relay connector:
2 3
1
5 6
4
8 9
7
11 12
10
X3
K
4-
C
K
4-
N
O
K
4-
N
C
K
3-
C
K
3-
N
O
K
3-
N
C
K
2-
C
K
2-
N
O
K
2-
N
C
K
1-
C
K
1-
N
O
K
1-
N
C
REL.4
REL.3
REL.2
REL. 1
C =
NO =
Common contact
NC =
Normally open
Normally closed
9.2.
Front Thumbwheel Switches
Moreover, the CT 641 models provide thumbwheel switches on the front panel, for simple and
easy setting of the cutting length.
This is how the front switches work:
Upon power-up the unit will read the thumbwheel settings and overwrite the internal
cutting length setting correspondingly, i.e. the system cuts the length set by the front
thumbwheels.
When during operation you change the thumbwheel setting, this will not affect the
cutting length until you apply a “Read Thumbwheel” command to the unit. You can
assign this command to either one of the front keys or to one of the Control Inputs, as
shown under sections 6.2.6 and 6.2.7
When the front thumbwheels are all set to zero, the controller will automatically use the
internal cutting length as entered by menu.
