Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 2013-11-26
4
Communication interfaces
4-42
MP-Bus PCD2.T500
4.11
Connection module for MP-Bus PCD2.T500
0
1
2
3
4
5
6
Plug-type connec-
tion to I / O bus
Surge voltage diver-
sion resistors
Diagnostic
LED
Diagnostic /
test release keys
Tip-jacks for
BELIMO
®
MFT-
service unit
Function LED
MP-Bus connection
terminals
Connection module for
PCD1 / PCD2 automation systems
Can be plugged onto an I / O mod
-
ule socket
2 RS-232 or TTL communications
channels
2 actuator connection channels,
each for 8 MFT / MFT2 actuators
and sensors
Connection of very wide variety of
sensors: passive and active sen-
sors, 2-point sensor on actuator
Integral monitoring of actuator
function
Extremely easy service check
4.11.1 Communications signals
The PCD2.T500 Module serves as an interface between the automation system
(DDC-PLUS) and the MFT / MFT2 damper actuators from BELIMO Automation AG.
The module can actuator up to two branches (bus connections) each having eight
connected actuators. Each branch can be run asynchronously, independently of each
other. To run both branches independently, the automation system will also require
two logical communications channels (RS-232 / TTL). However, if required, both
branches can also be run on only one logical communications channel.
Data exchange is asynchronous and runs at 1200 pulses / second. The automation
system leads the network as the “master”. The actuators have been designed as
“slaves” and only communicate when instructed to do so by the master.
4.11.2 Controls on PCD2.T500
Tip-jacks for MFT parameter setting unit from BELIMO
®
When the cover is removed from the controller, branches A and B can be provided
with tip-jacks that allow connection of an MFT parameter setting unit from BELIMO
®
.
As soon as the device is plugged in, the communications connection will automati-
cally switch over from the connection module to the parameter setting unit. The
controller is simultaneously informed of this fact, to avoid the appearance of a break
in communications.
There are the following parameterization devices of BELIMO
®
:
Manual Control Unit MFT-H
With its own power supply/batteries
PC-Tool
MFT-P
With the adapter ZIP-RS-232
Diagnostic and test release keys
For each branch a control key has been provided that triggers the start of a test for
fault-free communications with all connected actuators.