Instruction manual ITEM TE550 S.p.A.
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CHAPTER 14 - DESCRIPTION OF THE SIGNALS ON THE TERMINAL
BOARD
PIN NAME DESCRIPTION
1
3
VAC
This is the power supply of the control unit, which must be 24VAC. The power
supply transformer must be of at least 50VA and must power the control unit
only, to prevent any sources of interference.
2
GND Ground connection. Pay attention not to invert the wire with VAC (1-3) as
this could damage the control unit's fuses.
4
5
LOCK- / END-
LOCK+ / END+
This output is a polarized opto-electronic switch, Max 30VDC/10mA, and is
used to warn the user when a cycle ends if END CYCLE is selected; when in
LOCKED state, the control unit supplies a signal at output from the beginning of
the weld up to the hold.
6
7
WRONG -
WRONG +
This output is a polarized opto-electronic switch, Max 30VDC/10mA, and closes
if the set current limits are not met. The contact remains closed for the HOLD
and OFF time. In order to acknowledge all the signal activation cases, please,
refer to the relevant paragraphs.
8
COM2
Common for outputs with 0V reference. Connected to GND conforming to
regulation EN60204.
9
COM2
Common for outputs with 0V reference. Connected to GND conforming to
regulation EN60204.
10
TRIGGER
This is the SCR switch-on command output. The output is a rectangular wave,
amplitude of approximately 30V. The user must use trigger modules
manufactured by TECNA with opto-isolators.
11
COM1
Common for inputs with 24VDC reference.
12
RIC5
This input is used for calling the weld programmes directly from the outside.
This input is active closed on the COM1.
If the TE550 control unit is set to SEAM WELD mode, this input calls the
second weld current (POWER 3 or CURRENT 3 parameters).
13
14
15
16
RIC4
RIC3
RIC2
RIC1
These inputs are used for directly calling welding programs from the outside. In
order to call the programs correctly, these inputs must be enabled before the
cycle-start signal. Inputs are active when closed towards the common COM1.
17
COM1
Common for inputs with 24VDC reference.
18
AUX2
This input allows an external device to stop the weld cycle during the squeeze
stage. It may be used as interlocking input or to connect safety devices such
as, for instance, flow meters or pressure switches. The contact connected to it
must be the normally open type and activates closed on COM1.
19
START2 NO
To be connected to the microswitches of the cycle-start pedal. START2
determines the beginning of the work cycle of the second program selected
during the programming phase. This input is active closed on the common
COM1.
20
START2 NC
Currently this input is not used.
21
COM1
Common for inputs with 24VDC reference.
22
AUX
This input allows an external device to stop the weld cycle during the squeeze
stage. It may be used as interlocking input or to connect safety devices such
as, for instance, flow meters or pressure switches. The contact connected to it
must be the normally open type and activates closed on COM1.
23
START NO
To be connected to the microswitches of the cycle-start pedal. START
determines the beginning of the work cycle. This input is active closed on the
common COM1.
24
START NC
Currently this input is not used.
25
BIC1 NO
This input may be connected to the manual cycle-start buttons. The weld cycle
begins when BIC1 NO and BIC2 NO close simultaneously, or in sequence
within a max time of 0.5 seconds. This value was chosen conforming to
international safety standards.
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