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What cable do I use for Modbus Serial Communication between Harmony HMIST6 / HMISTM6 and BMXP341000/2000/2020?

Issue:

I would like to establish Modbus Serial Communications between a Harmony HMIST6 or HMISTM6 series HMI and a Modicon M340 PLC with the front RJ45 Modbus Serial Port (Part Numbers BMXP341000, BMXP342000, BMXP342020). What cable do I use?

Product Line:

Harmony HMIST6: HMIST6200, HMIST6400, HMIST6500, HMIST6600

Harmony HMISTM6: HMISTM6200, HMISTM6400

Modicon M340: BMXP341000, BMXP342000, BMXP342020

Environment:

Modbus Serial Cabling between HMI and PLC

Resolution:

This table below lists all possible connection types between the HMIST6/HMISTM6 models and the M340 PLC with the associated required Serial Cable:

HMI Part Number	HMI Serial Port	Serial Communication Standard	Cable Part Number
HMIST6200	COM1 (RJ45)	RS-485	XBTZ9980
HMIST6400	COM1 (Dsub9)	RS-232	TCSMCN3M4F3C2
HMIST6400	COM2 (RJ45)	RS-485	XBTZ9980
HMIST6500	COM1 (Dsub9)	RS-232	TCSMCN3M4F3C2
HMIST6500	COM2 (RJ45)	RS-485	XBTZ9980
HMIST6600	COM1 (Dsub9)	RS-232	TCSMCN3M4F3C2
HMIST6600	COM2 (RJ45)	RS-485	XBTZ9980
HMIST6700	COM1 (Dsub9)	RS-232	TCSMCN3M4F3C2
HMIST6700	COM2 (RJ45)	RS-485	XBTZ9980
HMISTM6200	COM1 (RJ45)	RS-485	XBTZ9980
HMISTM6400	COM1 (RJ45)	RS-485	XBTZ9980

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