- Emerson Remote Terminal Unit Instruction Manual

CI-ControlWave Express Service / 3-1
Section 3
ControlWave Express SERVICE
3.1 SERVICE INTRODUCTION
This section provides general, diagnostic and test information for the ControlWave Express.
The service procedures described herein will require the following equipment:
1. PC with null modem interface cable & Bristol WINDIAG Software
2. Loop-back plugs/wires (for RS-232 and RS-485) (see Figures 3-9 & 3-10)
The following test equipment can be used to test the Power Supply/Sequencer Module:
1. DMM (Digital Multimeter): 5-1/2 digit resolution
2. Variable DC Supply: Variable to 30Vdc @ 2.5A (with vernier adjustment)
When ControlWave Express RTUs are serviced on site, it is recommended that any
associated processes be closed down or placed under manual control. This precaution will
prevent any processes from accidentally running out of control when tests are conducted.
Warning
Harmful electrical potentials may still be present at the field wiring terminals
even though the ControlWave Express power source may be turned off or
disconnected. Do not attempt to unplug termination connectors or perform any
wiring operations until all the associated supply sources are turned off and/or
disconnected.
Warning
Always turn off the any external supply sources used for externally powered
I/O circuits, before changing any printed circuit boards.
3.2 COMPONENT REMOVAL/REPLACEMENT PROCEDURES
This section provides information on accessing ControlWave Express components for
testing, as well as removal/replacement procedures.
3.2.1 Accessing Components For Testing
Testing and replacement of ControlWave Express components should only be performed by
technically qualified persons. Familiarity with the disassembly and test procedures
described in this manual are required before starting. Any damage to the ControlWave
Express resulting from improper handling or incorrect service procedures will not be
covered under the product warranty agreement. If these procedures cannot be performed
properly, the unit should be returned to the factory (with prior authorization) for evaluation
and repairs.
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