COTRUST CTH200 Series User Manual

Power Budget
164
7.4 Power Calculation Example
Use following design methods to determine how many power configurations can be provided by
the ontology unit power supply.
Table 7-3 shows power calculation of CTH200 PLC, including:
 CPU H224X
 SM223 module, and SM223-1PH32 has 8DC inputs/8 relay outputs
 SM221 module, and SM221-1BF32 has 8DC inputs
 The device has 62 inputs and 42 outputs
In this example, the CPU provides enough 5VDC current for the expansion module, but not
enough 24VDC current for all input and expansion relay coils from the sensor. I/O requires
536mA while CTH200 CPU only provides 280mA. The device requires at least 236mA of 24VDC
additional power to operate all contained 24VDC inputs and outputs.
Table7-3 Power budget table
CPU power budget
5VDC
24VDC
Current CPU H224X offered
660 mA
300 mA
Minus
System requirement
5VDC
24VDC
CPU H224X, 14 inputs
14* 4 mA= 56 mA
4 SM 223-1PH32, 5V current
4*89 mA= 356mA
2 SM 221-1BF32, 5V current
2*57 mA= 114 mA
4 SM 223-1PH32, 8 inputs each
4*8*4 mA= 128 mA
4 SM 223-1PH32, 8 relay coil each
4*8*9 mA= 288 mA
2 SM 221-1BF32, 8 inputs each
2*8*4 mA= 64 mA
Total demand power consumption
470 mA
536 mA
Equal
Current balance budget
5VDC
24 VDC
Total current balance
190 mA
-236 mA

COTRUST CTH200 Series Specifications

General

Brand	COTRUST
Model	CTH200 Series
Category	Controller
Language	English