Allen-Bradley 1756-DHRIO User Manual

Publication 1756-UM514B-EN-P - February 2003
1756-DHRIO Module Description 1-5
Setting Switches
Before installing the module, you must set the network type switches
for DH+ or RIO, depending on your application. For a channel
configured as DH+, you must also select a node address within the
range of 00-77. Node addresses are set and displayed in octal.
Set the network type and node address switches as in Figure 1.4.
Figure 1.4
IMPORTANT
If your module uses the 230k DH+ network (i.e.
Channel A switch set to 3), Channel B is disabled.
Also, node address switches do not apply if you are
using remote I/O.
Network type
switches
(behind cover)
20810
Node type
switches
(behind cover)
This example shows
channel A set for DH+
and channel B set RIO
This example shows A node address
at 010 and channel B at 024
Specify Network Type Set Switch
Channel
A
DH+ - 57.6K 0
RIO Scanner 1
DH+ - 115K 2
DH+ - 230K
(Only channel A supports 230K DH+.
Channel B is disabled in this mode.)
3
Not used 4-7
Channel
B
DH+ - 57.6K 0
RIO Scanner 1
DH+ - 115K 2
Not used 3-7
These node switches are not used with RIO.

Allen-Bradley 1756-DHRIO Specifications

General

Model	1756-DHRIO
Category	Control Unit
Catalog Number	1756-DHRIO
Number of Ports	2
Shock	30 g
Vibration	5 g
Product Type	Communication Module
Communication Protocols	Data Highway Plus, Remote I/O
Port Type	DH+ and RIO
Data Highway Plus Baud Rates	57.6 kbps, 115.2 kbps
Baud Rate	57.6 kbps, 115.2 kbps, 230.4 kbps
Operating Temperature	0 to 60 °C (32 to 140 °F)
Storage Temperature	-40 to 85 °C (-40 to 185 °F)
Relative Humidity	5 to 95% (non-condensing)
Module Location	Any slot in a 1756 chassis
Isolation Voltage	50 V continuous
Certifications	CE, C-Tick, UL