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GUIDE
Document Number: 710-10806-00_422PP9R&422PP9TB_2117qsg
Recommended Accessories
DB9 Male to DB9 Female Cable
6 feet (1.8 m) length
# 9PAMF6
12VDC, 6W Power Supply, Stripped/
Tinned, International AC Input
(optional for 422PP9TB only)
# SMI6-12-V-ST
Before you begin, be
sure you have the following:
422PP9R
422PP9TB
Port-Powered RS-232 to RS-422 Converter
+ RS-232/422 Port-Powered Converter
+ DB9M to DB9F Adapter Cable (not included)
+ 12VDC, 6W Power Supply (not included,
optional for Model 422PP9TB only
Biasing Resistors
4
The biasing resistors for the RS-422/RS-485 receiver are
4.7k Ohm resistors. These resistors are labeled R1 and
R2 (See Figure 2). Refer to B&B SmartWorx “RS-422/485
Application Note” for further information on biasing.
External Power Supply Use
(Model 422PP9TB only)
5
When using an external supply, the supply should be
connected only to specifically labeled power inputs (power
jack, terminal block, etc.).
Connecting an external power supply to the handshake lines
may damage the unit. Contact B+B SmartWorx technical
support for more information on connecting an external
power supply to the handshake lines.
Model 422PP9R - RS-422/485 Biasing Resistors
Model 422PP9TB - RS-422/485 Biasing Resistors
