(continued overleaf)
RDCO-01/02/03
DDCS Communication
Option Modules
Overview
The RDCO-0x DDCS Communication Options are add-on
modules for the RMIO Motor Control and I/O Board, used in
ACS 800 family frequency converters. RDCO modules are
available factory-installed as well as retrofit kits.
The RDCO module includes the connectors for fibre optic
DDCS channels CH0, CH1, CH2 and CH3. The usage of these
channels is determined by the application program; see the
Firmware Manual of the drive. However, the channels are
normally assigned as follows:
CH0 – overriding system (e.g. fieldbus adapter)
CH1 – I/O extensions
CH2 – Master/Follower link
CH3 – PC tools (such as DriveWare).
There are several types of the RDCO. The difference between
the types is the optical components. In addition, each type is
available with a coated circuit board, this being indicated by a
“C” suffix, e.g. RDCO-03C.
The optical components at both ends of a fibre optic link must
be of the same type for the light intensity and receiver
sensitivity levels to match. Plastic optical fibre (POF) cables
can be used with both 5 MBd and 10 MBd optical components.
10 MBd components also enable the use of Hard Clad Silica
(HCS) cables, which allow longer connection distances thanks
to their lower attenuation.
Note: The optical component type does not reflect the actual
communication speed.
Delivery check
The option package contains:
• RDCO-0x module
• Two screws (M3×8)
• This document.
Compatibility
The RDCO-0x is compatible with the motor control and I/O
board (RMIO) of the ACS 800.
Module layout
Installation
WARNING! All electrical installation and
maintenance work on the drive should be carried
out by qualified electricians only.
The drive and adjoining equipment must be
properly earthed.
Do not work on a powered drive. Before installation, switch off
the mains and other dangerous voltages (e.g. from external
control circuits) to the drive. After switching off the mains,
always allow the intermediate circuit capacitors 5 minutes to
discharge before starting work on the frequency converter. It is
a good practice to check (with a voltage indicating instrument)
that the drive is in fact discharged before beginning work.
There may be dangerous voltages inside the drive from
external control circuits even when the drive mains power is
shut off. Exercise appropriate care when working on the unit.
Neglecting these instructions may cause physical injury or
death.
WARNING! The component boards of the drive
contain integrated circuits that are extremely
sensitive to electrostatic discharge (ESD). Wear
an earthing wrist band when handling component
boards. Do not touch the boards unnecessarily.
Do not remove any board from its antistatic packaging until
required.
WARNING! Handle the fibre optic cables with
care. The maximum long term tensile load is 1 N;
the minimum short term bend radius is 35 mm.
Do not touch the ends of the fibres with bare
hands as the fibre is extremely sensitive to dirt.
Use rubber grommets at cable entries to protect the cables.
The RDCO-0x module is to be inserted into the position
marked “DDCS” on the drive. On installation, the signal and
power connection to the drive (RMIO board) is automatically
made through a 20-pin connector.
The module is held in place with plastic retaining clips and two
screws. The screws also provide the earthing of module, and
interconnect the GND signals of the module and the RMIO
board.
Module Type
Optical Component Type
CH0 CH1 CH2 CH3
RDCO-01(C) 10 MBd 5 MBd 10 MBd 10 MBd
RDCO-02(C) 5 MBd 5 MBd 10 MBd 10 MBd
RDCO-03(C) 5 MBd 5 MBd 5 MBd 5 MBd
Fixing
screws
GND
Fibre optic channels
CHGND
CH 0
CH 1
CH 2
CH 3
