Orbisphere 3600 series - User-Supplied Cabling Requirements; LEMO Connector Assembly Instructions; Cable Gland Wiring Instructions

52 3600 Analyzer for O
2
Measurement—Operator’s Manual
3600O2.OM.E9903
2.1.5 User-supplied Cabling Requirements
Cables for the recorder output, alarm relay outputs, and RS-232 should be
“control” cables (that is, not power cables) with twisted copper wires and shield,
and meeting the specifications in the table below:
Recorder Alarms, RS-232
External diameter 6 – 8 mm 4 – 6 mm
Wire (core) area 0.14 – 0.25 mm
2
0.14 – 0.25 mm
2
Insulation PVC PVC
Nominal voltage 250 V 250 V
Absolute max. voltage 1200 V 1200 V
Absolute max. current 1.5 – 2.5 A 1.5 – 2.5 A
Wire resistance 140 – 70 Ω/Km 140 – 70 Ω/Km
Capacitance, Wire 100 pF/m 100 pF/m
@ 800 Hz Shield 240 pF/m 240 pF/m
Please note that you must ground the cable shield properly to the instrument case
to assure proper operation.
The maximum cable length for the RS-232 output is 20 meters. For installations
that require connection distances up to 1 Km, use RS-232/RS-485 converters at
each end of the cable.
2.1.6 LEMO Connector Assembly Instructions
As an example, take the LEMO-6 connector used for alarm outputs and RS-232.
Slide the pieces over the cable in the following order, referring to the diagram that
follows: boot, back nut, collet, ring (beveled edge down), rubber seal and reducer
(narrow edge down).
1. Strip off 8 mm of the insulation and 6 mm of the shield from the cable.
2. Fan out the remaining wires.
3. Remove the clear plastic wrap from the wires.
4. Strip off about 1 mm of insulation from the wires.
5. Slide the midpiece up over the wires to the shield.
6. To prepare for soldering, place the pin assembly in a vice and solder the wires
to the numbered pins.
7. Slide all the pieces down into the shell (note: the key in the midpiece must
match the notch in the pin assembly) and secure the entire connector assembly
by tightening the back nut.
2.1.7 Cable Gland Wiring Instructions
The nickel plated, brass cable glands are EMC types, designed so that the cable
shields can be directly attached to the instrument box. Typical cable wiring
through one of these glands is illustrated below.