Omron NJ501-1400 User Manual

A-99
Appendices
NJ-series CPU Unit Hardware User’s Manual (W500)
A-4 Load Short-circuit Protection and Line Disconnection Detection for CJ-series Basic I/O Units
A
A-4-2 Load Short-circuit Protection for CJ1W-OD204/OD212/OD232/MD232
 Restrictions
If a short-circuit occurs in an external load, immediately turn OFF the corresponding output and
remove the cause. An alarm output bit that corresponds to the external load output number is turned
ON. There is an alarm output bit for every common.
When an alarm output bit turns ON, use a self-holding bit for the alarm in the user program and turn
OFF the corresponding output.
The Alarm Output Bits are allocated in the Basic I/O Unit Information Area system-defined variable.
Sixteen output bits are assigned for each slot and rack in which a Unit is mounted.
_CJB_IOUnitInfo[rack_number,slot_number,serial_number_in_Unit]
For example, when the CJ1W-OD212 is mounted in slot 0 of rack 0, _CJB_IOUnitInfo[0,0,0]
changes to TRUE if output Ch1Out2 changes to TRUE.
When the CJ1W-OD232 is mounted in slot 1 of rack 2, _CJB_IOUnitInfo[2,1,1] changes to TRUE if
output Ch2Out8 changes to TRUE.

Omron NJ501-1400 Specifications

General

Model	NJ501-1400
Built-in Ethernet port	Yes
Built-in USB port	Yes
Power supply voltage	24 VDC
Power consumption	30 W
Operating temperature	0 to 55 °C
Protection rating	IP20
Cycle Time	1 ms
Built-in EtherNet/IP port	Yes
Built-in EtherCAT port	Yes
Programming language	IEC 61131-3 (LD, ST, FBD, SFC, IL)
Storage temperature	-25 to 70 °C
Operating humidity	10 to 90% RH (non-condensing)
Vibration resistance	10 to 57 Hz, 0.075 mm amplitude, 57 to 150 Hz, 9.8 m/s² acceleration
Shock resistance	150 m/s²