Functions
4
4.1
Terminals and their functions
Supply voltage A1, A2
Connection for device supply (see Chapter "Technical data (Page 71)").
Measuring inputs U, GND, (or U1, U2), E1, E2 and RJ45
The connections E1 and E2 are provided for NPN and PNP proximity switches (device version
with NAMUR sensors). The switches are supplied by terminals U with 24 V DC (device version
NAMUR U1 = U2 = 8.2 V DC) and GND. The encoder type (NPN or PNP) must be selected in the
menu.
The RJ45 interface is suitable for connecting encoders with sin/cos, TTL and HTL signals.
Output circuits (contacts) 13/14, 23/24
The device has two output circuits each implemented with two safety relays (standstill 13/14:
K1, K2; setup or automatic speed monitoring 23/24: K3, K4) with positively-driven contacts
switched in series.
• Automatic mode: Monitoring of automatic speed window and standstill speed.
• Setup mode: Monitoring of setup speed window. Standstill permanently enabled.
• Contact 13/14 switches in if the speed drops below the set standstill speed (n < n
Still
), in other
words, if standstill is detected.
• Contact 23/24 switches in if the speed is within the set speed limits of setup or automatic
mode (n
min
< n < n
max
).
Signaling outputs 15 and 25
The semiconductor signal outputs 15 and 25 are designed, for example, for connection to a PLC
and not for use in safety-related functions.
They function as follows:
• The internal supply potential (U
Rel
approx. 24 V) is output via terminal 15 when the speed
drops below the set standstill speed (n < n
Still
), in other words, if standstill is detected.
• The internal supply potential (U
Rel
approx. 24 V) is output via terminal 25 if the speed is within
the set speed limits of setup and automatic mode (n
min
< n < n
max
).
3TK2810-1 safety-related speed monitor
Equipment Manual, 05/2020, NEB926246402000/RS-AE/007
31
