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Rack Installation

The 7551 module uses an ID code of 3515, which configures the slot for 8 input and 8 output words.

RSLogix 500 will list a module with this ID code as a 1746-INT4 Ch Isolated Thermocouple Input. This is

normal. The 7551 module will still operate correctly.

Additional Programming Bits

AMCI has made a modification to the module's firmware to allow the 7551 module to function with

additional LDT transducers. These changes will not affect current systems or their programming if a new

7551 module replaces an existing unit in a system. This change is available only on modules with

Version 6 firmware or above. (You can determine the firmware version by looking at the label on the

smaller of the two labeled devices on the PC board.)

Upgrade: The 7551 now has the capability of selecting the number of recirculations sent to the LDT

sensor. Balluff BTL-5 LDTs with output type L only function when the sensor receives one

recirculation pulse per measurement cycle.

Programming: The following table describes the bit format for the addition of programmable

recirculations.

1. Units will be shipped with the default setting of 4 recirculations.

2. Configuration bits O:X.0/10 and O:X.0/11, where X is the slot number, determine the

setting of the number of recirculations. See table below

20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786

Tel: (860) 585-1254

Fax: (860)584-1973

Bit 11

Bit 10

Web:

www.AMCI.com

7551 Manual Addendum

# of recirculations

Retains last

programmed value

error

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