rotork CK Series User Manual

Keeping the World Flowing
21
4.7.2 Dual Highway
The most common application of the Dual channel card is for
Dual Highways in SR (System Redundancy) applications. If FR
(Flying Redundancy) is being used then a similar connection
at the actuator applies, but only one channel will require
termination at the end of the highway. The choice between
Simple and RedCom compliant redundancy does not affect
the connection options.
Single and Dual Data Highway Configurations
Fig. 13: Dual Highway SR Mode Connections
In1B
1A
Out
In
Out
In2B
2A
Out
In
Out
PLC Host
Data
Highway 1
Data
Highway 2
Actuator
Channel 1
Channel 2
Actuator
In1B
1A
Out
In
Out
In2B
Txd/ Rxd. N Txd/ Rxd. P
Txd/ Rxd. N Txd/ Rxd. P
2A
Out
In
Out
The connection of the actuator to the highway uses terminals
1A /1B (in and out terminals) on highway 1 and 2A / 2B (in
and out terminals) on highway 2, the terminal numbers
depend on the actuator type and are indicated on the
actuator wiring diagram. The highways should be arranged
so as to eliminate any stub connections. Take care to ensure
that the correct polarity is observed on the data highway
connection.
• Data line B is positive with respect to data line A when
the PFU is transmitting a ‘1’.
• Data line A is also called TxD/RxD-N
• Data line B is also called TxD/RxD-P
Both the Dual card options default to System Redundancy;
this allows two separate highways to be used. When the
RedCom compliant version is used the card uses RedCom
extensions to the standard DP V1 protocol to permit
redundancy to be used in a controlled manner.
The host system should be able to support V1 messages
and RedCom, if it cannot then the Simple redundant option
should be used.
A4 US
US
A4
US
A4
A4 US

rotork CK Series Specifications

General

Brand	rotork
Model	CK Series
Category	Controller
Language	English