Det-Tronics OPECL Infrared Hydrocarbon Gas Detector - Manual (Page 46)

H-4 95-8556 10.1
Do not assign duplicated addresses. Duplicated addresses are not automatically detected. Modules given the
same address will use the number given and report to the controller using that address. The status word will show
the latest update, which could be from any of the reporting modules using that address.
After setting address switches, record the address number and device type on the “Address Identification Chart”
(form 95-8487). Post the chart in a convenient location near the Controller for future reference.
IMPORTANT
The OPECL sets the LON address only when power is applied to the device. Therefore, it is important to set
the switches
before applying power. If an address is ever changed, system power must be cycled before
the new address will take effect.
oPEcl address switches
Address switches for OPECL are located within the receiver enclosure. Refer to Figure H-2 for switch location.
WarnInG
Disassembly of the OPECL housing and removal of the electronics module from the bulkhead is required
to gain access to the network address switches. Power should be removed from the detector before
disassembly. If disassembly is performed in a hazardous areas, the area must be de-classified before
starting disassembly.
WarnInG
Disassembly of the OPECL detector should only be performed with proper electrostatic discharge grounding
protection. A controlled lab or shop setting is recommended for device programming.
The OPECL detector contains semiconductor devices that are sensitive to electrostatic discharge (ESD).
Damage caused by electrostatic discharge can be virtually eliminated if the equipment is handled only in
a static safeguarded work area and protective measures against static electricity discharge are employed
during the disassembly process. Since a static safeguarded work area is usually impractical in most field
installations, handle the device by the housing, taking care not to touch electronic components or terminals.
Use a wrist grounding strap or similar method at all times to control accidental ESD when disassembling,
programming, or reassembling the OPECL gas detector.
Figure H-2—Location of OPECL Address Switches Inside Receiver Enclosure
ADDRESS SWITCHES
ELECTRONIC MODULE
REMOVED FROM HOUSING
A2192