Allen-Bradley 5069-IB16 - Page 142

142 Rockwell Automation Publication 5069-UM004A-EN-P - April 2019
Chapter 5 Safety Module Features
Table 43 shows the expected behavior of the muting status for test outputs
TO2M and TO3M. Keep the following points in mind as well:
• When power is applied to the 5069-IB8S or 5069-IB8SK module, and
T2 or T3 remains commanded off, the muting status defaults to on.
This bit operation is designed to help prevent erroneous muting
instruction faults from the owner-controller. This bit status is not always
the true indication of a burned-out lamp.
• If a muting lamp circuit is open when power is applied to the module,
the condition is detected when the test output is commanded on.
• When a lamp burns out and is replaced, the fault (muting status bit)
returns to the normal condition, independent of the state of the test
output.
Table 43 - Muting Status Bit Operation
IMPORTANT Before checking the state of the corresponding muting status, be
sure that the test output is commanded on. Once the test output is
commanded on, a maximum time of 6 seconds is required for the
module to detect a burned-out lamp.
Test Output
Commanded
State
Lamp
Condition
Muting Status
Bit
Description
ON Bad (open
circuit)
0 Repair lamp.
ON Good 1 Normal condition. Lamp is operating properly.
OFF Bad (open
circuit)
0 If lamp remains OFF after T1/T3 output cycled, repair
lamp.
OFF Good 1 Normal condition.