Are there pull-up/pull-down resistors on the RS-485 port in the ACX57xx controllers?

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Issue

Having communication issues with Schlage PIM devices attached to ACX2's 485 port.

Environment

ACX57xx

Cause

Documentation

Resolution

The ACX57xx RS485 port has 47K resistors on the +/- lines. The 47K on the plus line is pulled up to 3.3v. The one on the minus line is pulled down to ground.

They are both 1/16 watt resistors.

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Are there pull-up/pull-down resistors on the RS-485 port in the ACX57xx controllers?

Related Forums

Intelligent Devices Forum