Operation
8.6 LEDs, keys and their meanings (undelayed and delayed)
3TK2826 safety relay
24 Manual, 08/2007, GWA NEB 926 1579-02 DS 02
Table 8-6 Connecting terminals 3TK2826-*CW3.1/2/4 - undelayed and delayed enabling circuits
Connecting
terminal
Meaning
A1 24...240 V AC/DC
A2 Chassis ground/N
13, 14; 23, 24 Relay enabling circuit, normally-open, undelayed
31, 32 Relay signaling circuit, normally-closed (enabling circuit status), undelayed
47, 48; 57,58 Relay enabling circuit, normally-open, delayed
61,62 Relay signaling circuit, normally-closed (enabling circuit status), delayed
73, 74 Relay signaling circuit, normally-open (feedback circuit fault)
T1, T2 Test outputs with pulsed test signals
T3 Test output with static test signal (+24 V DC)
1 Cascading input/normal switching duty
Y12, Y22 Sensor inputs, channel 1, channel 2
Y33 Start button (start after upwards and downwards edge)
Y34 Feedback circuit (checked only for "closed" to enable operation without feedback)
8.6 LEDs, keys and their meanings (undelayed and delayed)
Table 8-7 LEDs - undelayed and delayed enabling circuits
LED Status Meaning
Off No / too low supply voltage or internal fuse tripped.
Green Supply voltage in the permissible operating range
Flashing green Self-test during restart
Yellow Configuration mode DIP switch
Flashing yellow Configuration error or
configuration mode for delay time
Green/yellow
flashing
Delay time changed
Device
Red Device defective -> Replace device
Device faulty (e.g. due to electromagnetic interference)→ Press Reset
Off Output passive
Green Output active
OUT
Flashing green
• OFF-delayed output, time running
• RF not
"closed"
if start condition met (the SF LED also flashes)
Off Input passive (or switch-on condition not satisfied)
Green Input active
IN
Flashing green Cross-circuit at the input, simultaneity of sensors not satisfied, wire breakage during safety
shutdown mat operation
Off No group fault
Red Group fault (wiring fault, cross-circuit, wire breakage in the case of safety shutdown
operation, configuration error) -> Eliminate the fault and press RESET
SF
Flashing red Group fault (RF fault, simultaneity condition of the sensors not satisfied)
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