Omron SYSMAC CS Series Operation Manual page 696

Specifications of Basic I/O Units and High-density I/O Units
Circuit Configuration
Terminal Connections
Note Be sure to supply power to A9; otherwise current will leak through the load while the output is OFF.
C200H-OD214 Short-circuit Protection
The C200H-OD214 Output Unit is equipped with two types of short-circuit protection: overcurrent protection
and thermal protection. Any short-circuit must be eliminated immediately to protect the Unit.
Overcurrent Protection
When the output current reaches 2 A, the alarm output turns ON, and the alarm indicator lights. Make sure the
surge current of the load does not exceed 2 A, or the alarm may be activated.
Thermal Protection
When the junction temperature of the output transistor reaches its upper limit, the output will turn OFF, the
alarm output will turn ON, and the alarm indicator will flash protect to the transistor.
As shown in the alarm output table given below, there is one alarm indicator and alarm output bit for every two
outputs. The alarm indicator and alarm output bit will function the same regardless of which output an alarm is
detected for.
Thermal protection also works for two outputs at a time. If the thermal protection level is detected for one of the
outputs, the other output will be turned OFF as well.
The output transistor is provided with a cooling plate. If only one of the outputs is short-circuited, heat genera-
tion will be balanced with heat radiation, and the transistor junction temperature may increase high enough to
activate thermal protection. The alarm indicator and alarm output bit, however, will operate so that the alarm
can be detected.
658
Output indicator
Source
Driver
Internal
circuits
+
Reset
button
Alarm Output
indicator
24 V DC
OUT
L
+ V
OUT
L
24 V DC
COM
0
L A0
1
A1
L
2
A2
L
3
A3
L
4
A4
L
5
A5
L
6
A6
L
7
A7
L
A8
COM (0 V)
24 V DC
A9
Appendix A