Raman Rxn2 Operating Instructions
Endress+Hauser 13
3.3.4 Rear panel: Rxn2 hybrid configuration
All normal system I/O is located at the rear of Raman Rxn hybrid analyzers. This includes:
• Fiber-optic connectors/electrical connection for one remotely installed Rxn-20 probe. The electrical connection
contained within the fiber optics is an intrinsically safe interlock loop which will turn off the laser for the Rxn-20
probe in case of fiber breakage. All connections are protected by a cover secured to the rear panel with two
socket head cap screws.
• EO fiber connector/electrical connection for one remotely installed ALT probe. The electrical connection
contained within the fiber optics is an intrinsically safe interlock loop which will turn off the laser for the
alternate probe in case of fiber breakage.
• Two remote interlock connections for the Rxn-20 and ALT probes, each intrinsically safe and in series with the
fiber breakage detection loops described in previous bullets.
• Two TCP/IP Ethernet ports for OPC and Modbus automation as well as remote control
• One serial RS-485 port for Modbus automation
• One mini DisplayPort for local display, if needed
• Two USB 2.0 Type A ports, one for local touchscreen (if needed) and one reserved for future use
• AC power inlet, C13 plug required. See Specifications → .
Handle probes and cables with care.
Fiber cables should NOT be kinked and should be routed to maintain the minimum bend radius of 152.4 mm
(6 in).
Permanent damage to the cables may result if they are bent beyond the minimum radius.
3.4 Probe connectors
The probes are connected to the base unit at the connection panel located on the rear of the base unit.
For single-channel or four-channel Raman Rxn2 configurations, as well as the alternate (ALT) probe channel of the
Raman Rxn2 hybrid configuration, each channel employs a single robust electro-optical (EO) connector which
contains excitation and collection fiber optics as well as an electrical laser interlock loop. The interlock contained
within the probe fiber optics is a low voltage and current loop designed to detect fiber cable breakage and will turn
laser emission off for that channel in the event of a break. Ensure the latch is engaged after inserting EO fiber
connector.
For the Rxn-20 channel of the Raman Rxn2 hybrid instrument, the main fiber-optic bundle is furcated into three FC
fiber-optic connectors and one electrical interlock loop connector. The FC fiber-optic connections are used for laser
excitation, Raman scatter collection, and auto-calibration. The interlock loop contained within the probe fiber optic is
a low voltage and current loop designed to detect fiber cable breakage and will turn laser emission off for the Rxn-20
probe in the event of breakage.
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