244
saia-pcd.com
PCS1
PCD3
Compact
PCD1
PCD2
PCD3
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Sample Project
Planning Guide
Description:
Two stage partial air conditioning system with
plate heat exchanger, air heater and air cooler.
Ventilation with manual/emergency operation.
A control cabinet is to be provided for the installa-
tion of electrical and automation technology.
Controller:
Flexible, modular and expandable
controller
Interfaces:
Basic interfaces – Ethernet / USB
energy
measurement M-Bus; expandability option
Expansion reserve:
At least 20 % expansion reserve
Data:
Recording/storage of operational data
2.
Definition of device family
System selection
Device families PCD1 /
PCD2 and PCD3 meet
the specification re-
quirements regarding
basic communications
interfaces.
Device families PCD2
and PCD3 meet
the requirements
for modularity and
expandability.
Based on its direct
manual/emergency
operation capability,
the PCD3 family is
chosen.
For further selection
criteria, see steps 3
and 4.
Saia PCD® devices as user programmable instrumentation, control and automation (ICA) equipment with a design that is either flat,
compact or cassette-type. Modular and expandable device series with enough reserves to allow expansion of communications for the
device family.
Requirement from specification
Specification
Data memory
In-/outputs
Selection criteria
Communication
Mounting location
Manual operation
Expandability
Modularity
Mounting
location
Modularity
Manual opera-
tion
Expandability
Form
Switch cabinet
Compact
Modular
Flat
up to 1024 DP
up to 50 DP
up to 102 DP
up to 44 DP
NO
NO
YES
NO
Cassettes
up to 1024 DP
YES
D
EVICE
FAMILY
System families
Ethernet/USB
Modularity
Expandability
Manual operation
Meets require-
ment only
in manual/
emergency
operation
Meets require-
ment of basic
interfaces with
reduced ex-
pandability.
Without man-
ual/emergency
operation
Similar to the
PCD3 family
with reduced
expandability.
Without man-
ual/emergency
operation
Meets require-
ment of basic
interfaces and
expandability.
Without man-
ual/emergency
operation
Meets
requirements
of basic com-
munications,
expandability
and manual/
emergency op-
eration
C
OMPACT
M
ODULAR
Maximum PLC flexibility
Sustainable automation solutions require maximum flexibility in ex-
pansion and function. The greater the need for flexibility and expand-
ability, the more weight should be placed on open, modular systems.
The basic "USB / Ethernet" communication interfaces for program-
ming and data exchange are the basis for sustained system usability.
Mounting in control cabinet
Modular systems are generally used when
mounting is required inside closed electri-
cal control cabinets. The «Flat» or «Cassette»
system forms do not differ in function, but may
affect space availability in the cabinet.
Project:
Control and fault reporting
system Switzerland LSS-CH
PLC automation equipment
Specifications
tions
Emerg.
con-
trol
Control
functions
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