Modbus Installation | 4
EL/NH-EL Models
The EL/NH-EL models use a 3-pole connector on the main processor card for Modbus
connection. This 3-pole connector is provided with all EL/NH-EL and connections can be made
directly to this plug. Refer to Figure 2 and Figure 3 for connection location and wiring.
Please note: there is a 120 Ohm termination resistor available on board. When the jumper J4
is on, 120 Ohm is enabled. When the jumper J4 is off, 120 Ohm is disabled.
Figure 2: EL/NH-EL Modbus 3-Pole Plug Location
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