Honeywell DR4300 manual Communication Optional, Communication Wiring

Installation

2.5.4 Communication (Optional)

Introduction

If the recorder hardware supports optional Modbus RTU communication, the communication link is wired to the terminal block on the communication board in the upper left corner of the case.

ATTENTION

Network address, baud rate, and transmitter delay are configurable for models with a display (see

Section 4).

For models without a display the address of pen 1 is fixed at 127, baud rate is fixed at 9600, and there is no transmitter delay. Only one pen channel with the fixed address of 127 can be on the network. Pen channel 2, if present in the recorder, cannot communicate. (Display is required to configure a unique address for the second pen to communicate.)

Procedure

Refer to Figure 2-13while following the procedure in Table 2-11to install communication wiring.

Table 2-11 Communication Wiring

Step

Action

ATTENTION To avoid damaging the recorder, be sure that you install the power wires into the correct screw terminals as shown Figure 2-9and Figure 2-10.

1Open the recorder door. Loosen the captive screw in the chart plate and swing the plate out.

2Locate the terminal block on the optional communication printed circuit assembly in the upper left corner of the case. (See Figure 2-13.)

3Run the communication wires through the appropriate conduit hole (see Figure 2-7and Figure 2-8). DO NOT bundle them with the power wires.

4Strip 1/4-inch maximum of insulation from the end of each wire and form end to fit under a screw connection.

5Insert the wires under the appropriate screws (labeled on assembly). Tighten the screws to secure the wires.

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