Section IV – Diagrams
MN06135 Issue/Rev. 1.3 (6/17) 58
Figure 46. EIA-232 Multi-Drop Communications
The figure shows the typical wiring scheme for multi-drop communications between a communications device and
multiple AccuLoad IIIs. Refer to the table below for pin numbers on each of the EIA-232 communication ports.
Note that the shield is to be terminated at the communication device.
Comm Port Tx Rx Common Board Terminal Block
1 1 2 5 KDC TB1
2 1 2 3 KDC TB2
4 1 2 3 EAAI TB4
Table 13. EIA 232 Communication Ports
Note: Communications Ports 1 and 2 can be either EIA-232 or EIA-485.
Tx
Rx
Gnd
AccuLoad III
Tx
Rx
Gnd
Tx
Rx
Gnd
Tx
Rx
Gnd
Tx
Rx
Gnd
Shield
Communicating
Device
AccuLoad III
AccuLoad III
AccuLoad III
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