Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Saia-Burgess
Controls Ltd.
Expansion with PCD3 components
PCD3.Mxxx0 Classic CPUs and expansion housings
3-9
3
3.5
Expansion with PCD3 components
The PCD3.Mxxxx controllers can be expanded with PCD3.Cxxx components, mak-
ing additional module sockets available. On the PCD3.Mxxx0, up to 15 PCD3.Cxxx
module holders can be attached (PCD3.M3020 cannot be expanded). This allows the
user to attach a maximum of 64 I/O modules, or 1023 digital inputs/outputs.
Type
M3020
M3230
M3330
M5440
M5540
Maximum number of inputs/outputs or I/O modu-
le sockets for the system:
64
1)
4
1023
1) 2)
64
1023
1) 2)
64
1) Using digital I/O modules PCD3.E16x or A46x with 16 I/Os each
2) On all PCD3 units, address 256 is reserved for the watchdog. The I/Os reserved for the watchdog cannot be used,
and no analogue and H modules can be used on the sockets with base address 240
PCD3.M5540
PCD3.C100
PCD3.C110
Addressing
For local expansion, the PCD3 LIO (local I/O) modules can be used.
For decentralized expansion using profibus, the PCD3 RIO (remote I/O) modules can
be used:
The maximum number of I/Os is dependent on the controller being used:
When selecting I/O cassettes, ensure that the internal 5V and +V supply is not
overloaded.
���������
���������
���������
���������
���������
���������
���������
���������
���������
���������
���������
���������
�
���
���
���
next row up to
max. 1023
��
��
��
��
���