Technical data

5/9 2TLC172001C0202 | ABB Safety Handbook
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Output connections – Vital 1
The Vital 1 has two (2 NO) safety
outputs. In order to protect the output
contacts it is recommended that loads
(inductive) are suppressed by fitting cor-
rectly chosen VDR’s, diodes etc. Diodes
are the best arc suppressors, but will
increase the switch-off time of the load.
Relay outputs Information outputs
Reset connections – Vital 1
The manually supervised reset contact
connected to input X1 must be closed
and opened in order to activate the
relay outputs.
Automatic reset is selected when B1,
X1 and X4 are connected. The relay
outputs are then activated at the same
time as the inputs.
Contactors, relays and valves can be
supervised by connecting ‘test’ con-
tacts between B1 and X1. Both manu-
ally supervised and automatic reset can
be used.
B1
Vital 1 has a switching relay output for
information. The function is determined
by a DIP switch.
The DIP switch position 1 (original
position) is the information output Y14
internally connected to 0V and +24 V
as per:
– Y14 is closed to 0V (B2) internally
when Vital 1 has not been reset.
– Y14 is closed to +24 V (B1) when
Vital 1 has been reset.
In DIP switch position 2 (the purpose
of the function is to start/restart block,
RES) the information output Y14 is
internally connected to 0V and +24 V
as per:
– Y14 is internally closed to 0V (B2)
when the dynamic safety loop is open
or when the dynamic safety loop is
closed and Vital 1 has been reset.
– Y14 is internally closed to +24 V
(B1) when the dynamic safety loop is
closed but Vital 1 has not been reset
(RES).
Vital 1
Y14
B1
B2
0V
+24V
0V
Vital 1
Y14
B1
B2
0V 0V
+24V
0V
Connection of S1
Even number of units in series
(Eden+Spot+Tina) requires a connection
between B1 and S1. S1 is not connec-
ted at odd number of units.
See drawing below figure A and other
examples in the book
Manually supervised reset Automatic reset Testing external contactor status