Operation; Led Indication; Information Output Signal Attributes - ABB Tina 7A Original Instructions Manual

5

Operation

LED indication

LED Indication
Green
LED on Tina
Green-Red (flash)
Red

Information output signal attributes

The information output of the unit (pin-5) is set either high (+24 VDC) or low (0 VDC) depending on four different
input signals (pin-2):
• Dynamic signal - Dynamic signal input exist, i.e. the safety circuit is OK up until this unit
No dynamic signal - Dynamic signal input does not exist, i.e. the safety circuit is interrupted before this
•
unit.
+24 VDC - A constant +24 VDC signal is applied = high (H)
•
• 0 VDC - The pin is connected to 0 VDC = low (L)
The information output signal depends on the input signal according to the table below. Note that if the safety is
interrupted the information output signal is always low (L).
Input signal (pin-2)
Info output signal (pin-5)
The delay for switching the information signal output from high to low (H  L) and low to high (L  H) is given in
the table below.
Info output signal switch
Delay
NB: If the unit detects an error (short circuit or interruption) lasting shorter than 13 ms the information output signal
is set to low for 1.2 s (1200 ms) and then set to high again. This does not affect Vital since it needs 38 ms to
release. Pluto however does release, which means that a filter (20 ms) must be implemented if this function is
needed.
Warning! The information output signal is not a failsafe signal and should never be used for the safety purpose(s).
2TLC172139M0201, rev. B
2013-03-02
Description
Safety circuit closed (protection OK)
Safety circuit open (protection OK)
Safety circuit interrupted (protection open)
Dynamic signal
High
H  L
~ 12 ms
Input signal on pin-2
Dynamic signal in
No dynamic signal in or 0 VDC in
+24 VDC in or safety circuit interrupted
No dynamic signal
High
L  H
~ 0 ms
9
+24 VDC 0 VDC
Low High
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