Specifications

35
4. Maintenance
WARNING
!
This product contains components that have critical safety characteristics. Do not
substitute components. Replace components only with identical factory supplied
components. Component substitution may impair the electrical safety of this
equipment and its suitability for use in hazardous locations.
The maintenance of the 870IT Transmitter is limited to replacement of the keypad, the core
printed wiring assembly (PWA), and the sensor PWA. See PL 611-156 for Style A or PL 611-153
for Style B transmitter part numbers. Attempts to repair printed wiring assemblies could result in
damage and voiding of the warranty. The recommended repair procedure is replacement of the
PWA or return of the PWA to the factory for repair.