Omron Sti G9SX-LM224-F10 Series User Manual page 6


Connecting Safety Sensors and G9SX-LM
1) When G9SX-LM is connected to a safety sensor, Terminal Y1
should be connected to 24VDC for Enable input channel. Or for
Safety input channel, Terminal Y2 should be connected to 24VDC.
If Terminal Y1 or Y2 is open, G9SX-LM will detect it as a
connection error.
2) In some cases, safety sensor outputs include off-shot pulses for
self-test purpose.
Please note the following;
- Off-shot pulse width of the sensor, during the ON-state :
500μs Max.

Response performance regarding speed detection
The response time of the entire system regarding speed detection can be calculated by the following formula:
Ts = Tp + Tf + Tr + Tm
Ts : Response time of the entire system
Tp : Response time of the proximity sensor
Tf : Frequency detection time of G9SX-LM
Tr : Response time of G9SX-LM
Tm : Response time of the machine

Response time of proximity sensor (Tp)
Calculation formula is as follows:
Tp = 1 / F (s)
F : Response frequency of the proximity sensor connected to G9SX-LM

Frequency detection time of G9SX-LM (Tf)
The time taken to detect frequency at the rotation detection input section of G9SX-LM.
Detection time differs depending on the input frequency.
For details, see the diagram below for the characteristics data.
Relationship between input frequency and frequency detection time (Example of characteristics data)
Set value of low-speed detection frequency (See the right table.)
1100
1000
900
800
700
600
500
400
300
200
100
2 4
Frequency detection time (Reference value)

Response time of G9SX-LM (Tf)
Tr = 15ms max.

Response time of the machine (Tm)
The time from when the machine receives a stop signal to the time when the machine's hazardous part stops.
500μs Max.
6 8 10 14

Terminal arrangement and LED indicators
TYPE G9SX-LM224-F10-
20 28 40 50
- 6 -
T31 T32 T33 M1 D12 D22 D11 D21
T11 T12 T61 T62 M2 Y1 Y2
PWR FB AND
T1 T2 MOD
T6 T7
DS
EI ES
ERR
T21 T22 T71 T72 T41 T42 L1
X1 X2 X3 X4 S14 S24
ES1
Set value of
Frequency
low-speed
detection time
detection frequency
(Reference value)
1000 ms max.
2 Hz
2.2 Hz 910 ms max.
2.4 Hz 835 ms max.
2.8 Hz 715 ms max.
3 Hz 670 ms max.
3.2 Hz 625 ms max.
3.6 Hz 560 ms max.
4.2 Hz 480 ms max.
4.7 Hz 430 ms max.
5.3 Hz 380 ms max.
6 Hz 350 ms max.
6.6 Hz 305 ms max.
7.3 Hz 275 ms max.
8.4 Hz 240 ms max.
9.3 Hz 220 ms max.
10 Hz 200 ms max.
A1
A2
ES2