Table 2-21 Rs485 Modbus Communications Wiring - Honeywell DR4500A Product Manual

Installation - Option Wiring Procedures
RS485 Modbus communications wiring
RS485 Modbus Communications is an option available on the DR4500A recorder.
The prerequisites are:

Model Number - Table 3 = 3XX or 4XX
Refer to Figure 2-21 and follow the procedure in Table 2-21 to wire the RS485 Modbus communications
option.
Step
1
Open the recorder door. Loosen the captive screw in the chart plate and swing the plate out.
2
Locate connector J3 on the RS485 Modbus communications option printed circuit board (refer
to Figure 2-21 for location).
3
Remove the unwired plug from J3.
4
Run the communications option wires through the desired knockout.
5
For CE Mark conformity
6
Strip insulation from the end of each wire.
7
Loosen the screws in plug J3 terminals and position the plug as you would to plug it into J3.
8
Insert the wires for the communications option into the appropriate screw clamps as shown
(refer to Figure 2-22). Tighten the screws to secure the wires.
9
Install the wired plug J3 into J3 connector on the communications board.
REFERENCE
Refer to Documents 51-52-25-66 and 51-52-25-69 for a complete description of RS485
Modbus Communications Option.
50 DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual

Table 2-21 RS485 Modbus communications wiring


Install the ferrite filter as shown in Figure 2-11.

Refer to Figure 2-21 for shield information.
Action
Release M
April 2017