Rs-485 Converter For Central Controller; Figure 14: Rs-485 Pc Connection - Roberts Gorden UltraVac NEMA 4 Installation Manual

5.2 RS-485 Converter for Central Controller

For remote on-site viewing of system status and
settings of any controller, use the RS-485 converter
to connect a single PC (9 pin serial port) to the RS-
485 terminals on the Central Controller. This will
allow communication between one PC and any of the
ULTRAVAC™ controllers on the network. For RS-485
converter wiring details see Page 21, Figure 14 and
see Page 25, Section 5.5

FIGURE 14: RS-485 PC Connection

+ - + - + - + -
Description
RS-485 Converter Package with
Power Supply
To Controller #2
Dip Switch #1
set to ON
Central Controller
Part Number
10080430
For communication cable requirements see Page 12,
Section 3.3.5.
If multiple ULTRAVAC™ controllers are being used, the
additional controllers communicate to controller #1
through RS-485 communication wiring arranged
in-series from one controller to the next. See Page 25,
Section 5.5. This allows multiple controllers to be
controlled from a PC through a single communication
package at the central controller.
RS-485 adapter power supply
(supplied with RS-485 adapter)
Wire with white stripe
to positive terminal
RS-485 Adapter
25-pin male to 9-pin female adapter
(supplied with RS-485 adapter)
SECTION 5: C
OMMUNICATIONS
(+)
(-)
LED
single
9-Pin Female
®
Windows
Compatible PC
21