Troubleshooting
Fast, Easy Answers...
Connecting a Signal Ground
(common, reference) on the RS-422/485 side. The specifications
for most RS-422 and RS-485 devices indicate that the device
can withstand a maximum VCM of -7 volts to +12 volts. The
function of the GND connection is to tie the signal grounds of
all nodes on a network to one common ground potential. This
ensures that the common mode voltage cannot exceed the
specified value.
A signal ground is required on the 485DRCI-PH because it is
an optically isolated device. If you do not have a signal ground
(common, reference) on your RS422/485 device, you can
connect to the DC power ground of your RS422/485 device.
Caution: Make sure that this is connected correctly.
Note: Do not use the shield drain wire as the
signal ground between RS-422/485 devices.
Information – UL Class 1 Div 2
1. Refer to the Nonincendive Field Wiring
Apparatus Control Drawing for important
information.
2. Power, Input / output (I/O) wiring
for the end use enclosure must be in
accordance with Class 1 Division 2 wiring
methods (Article 501.10(B) of the National
Electric Code, NFPA 70) and in accordance
with the local authority having jurisdiction.
3. Maximum ambient air temperature
85°C.
4. Temperature rating of field installed
conductors 105°C. Use Copper Wire Only.
5. These devices must be installed in end
use enclosure suitable for the location.
6. WARNING – EXPLOSION HAZARD
SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS 1,
DIVISION 2.
7. WARNING – EXPLOSION HAZARD:
DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED
OFF OR THE AREA IS KNOWN TO BE
NON-HAZARDOUS.
8. WARNING – THIS APPARATUS IS
SUITABLE FOR USE IN CLASS 1 DIVISION 2,
GROUPS A, B, C, AND D OR NONHAZARDOUS
LOCATIONS ONLY.
Fast and easy on the web:
www.bb-elec.com
Triple Isolated RS-232 to
RS-422/485 Converter
485DRCI-PH
Document number – pn8931_R003_485DRCI-PH_0113qsg
© 2013 B&B Electronics Manufacturing Company
1-888-948-2248 |
Europe:
+353 91 792444
www.bb-elec.com
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Please double check
Step 2.
You can also use your
smart phone to access
complete documentation
on our website. Simply
scan code to the right.
485DRCI-PH
Additional Items Required but Not
Included:
First Things First...
Before you begin, be sure you have
the following:
707 Dayton Road | PO Box 1040 | Ottawa, IL 61350
Phone: 815-433-5100 | Fax: 815-433-5109
www.bb-elec.com | E-mail: [email protected]
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MDR-20-24
Power Supply
http://www.bb-elec.com/Products/
Power-Supplies-Accessories/DIN-
Power-Supplies/Industrial-Slimline-
Power-Supplies.aspx
A 10 to 48 VDC Power Supply,.
(Converter draws 1.9 W Max.)