SBC PCD2.M5 Series - Planning an Application with PCD2.M5_ Components

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Planning an application
Overview
2-2
2
2.3 PlanninganapplicationwithPCD2.M5_components
The following aspects should be considered when planning PCD2.M5_ applications:
● TheinternalloadcurrenttakenbytheI/Omodulesfromthe+5VandV+supply
 mustnotexceedthemaximumsupplycurrentspeciedfortheCPUsorLIOs
 (PCD2.C2000/C1000)
● TheCPUtypedeterminesthemaximumnumberofmodules
● ThetotallengthoftheI/Obusislimitedbytechnicalfactors;theshorter,the
better
When planning an application, we recommend the following procedure:

Select the I/O modules according to your requirements.

Check that the number of module holders is allowed:
PCD type Max. number of I/O modules Max.
1)
digital I/Os
PCD2.M5_ PCD2 CPU PCD2
expansion
Total PCD2 CPU PCD2
expansion
Total
8 56 64 128 896(-1) 1024(-1)
1)UsingdigitalI/Omoduleswith16I/Oseach
The values in brackets have to be subtracted from the maximum number of digital I/
Os because of the watchdog relay.
To expand PCD2 CPUs with PCD3 RIOs, the planning instructions in the PCD3
Manual 26/789 should be followed.

If necessary, select the PCD2.C2000/C1000 expansion housing:
 ● PCD2.C2000 8moduleslotsorPCD2.C10004moduleslots
 ● PCD2.K106 26-coreextensioncabletoconnectPCD2CPUs.
 ● PCD3.K1x6 26-coreextensioncabletoconnectthelastPCD2.C2000
/C1000 expansion housing in a row to attached further
rows of PCD2.C2000/C1000 expansion housings.
 ● PCD2.K010 ConnectortolinkPCD2.C2000expansionhousings
for mounting side-by-side.
Fortheconnecingcablesandplugsrequired,seealsosection3.4.3.

If PCD2.Wxxx and PCD2.Hxxx modules are used, calculate the load current
 attheinternal+5VandV+supply(usetheworst,i.e.highestvalues)

 Checkthatthemax.supplycurrentfortheCPUissufcient;itgenerallyshould
be.

Estimate consumption from the 24 V supply. Use estimated values. The
estimated values can be found in the section on the Current consumption of the
PCD2 input/output modules.
Note that in most applications the outputs place the heaviest load on the 24 V
supply.For16outputswithaloadcurrentof0.5Aeach,theloadingwillbe8Awith
all outputs connected.