Omron CRT1 - 10-2009, Operation Manual

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Bit Slave Units with Compact Connectors
Section 9-5
9-5 Bit Slave Units with Compact Connectors
9-5-1 Bit Slaves with Compact Connectors
Connecting to Communications Cables
The following communications connectors can be connected to Bit Slave
Units with Compact Connectors.
Applicable Communications Connectors
The DCN4-TB4 Open Type Connector and DCN4-MD4 Multidrop Connector
cannot be used with Bit Slaves with Compact Connectors. For information on
how to process and attach the communications connectors, refer to
3-3 Pre-
paring Flat Connectors .
Applicable Functions
Bit Slave Units with Compact Connectors do not include functionality to collect
data to help shorten startup and recovery time for control systems and main-
tenance systems.
For details, refer to 1-1-3 CompoNet Slave Unit Functions on page 7.
Checking the Communications Power Supply Voltage
Bit Slave Units with Compact Connectors do not support a network power
supply voltage monitor. Use either of the following methods to check the volt-
age if a Flat Cable is connected.
• Connect a Flat Connector Socket connected to a cable to a Flat Connec-
tor Plug or Flat Cable I Multidrop Connector Plug at the location where a
Bit Slave Unit with Compact Connectors is to be connected, secure the
extended cable with the terminal block so as not to cause a short circuit,
and measure the voltage using a voltmeter.
• Use a tester or voltmeter to measure between the V and G terminals of
the I/O connector.
Note (1) Be careful to not cause a short-circuit when performing the measure-
ment. The system or Unit may be damaged if a short-circuit is created.
(2) Always turn OFF the output from the Output Unit before measuring be-
tween the V and G terminals of the I/O connector. The Unit may be dam-
aged if a short-circuit is made with a signal pin for which the output is ON
when the measurement is performed.
Continuous Short- circuit Protection Circuit
This prevents the network power supply from continuously remaining short-
circuited if a short-circuit occurs in I/O wiring. This protection circuit may
become damaged when a short-circuit occurs, and cause the Unit to not oper-
ate correctly.
Name Model Hook Applicable
communications cable
Open Type Connector (for Unit connection) HCN-
(Honda Tsushin Kogyo Co.,
Ltd.) Internal Round Cable I and
Round Cable II
Flat Connector Plug DCN4-BR4 Internal Flat Cable I
DCN5-BR4 Internal Flat Cable II
Multidrop Connector Plug for Flat Cable I DCN4-MR4 Internal Flat Cable I