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Step 6: Install Accessories and Cables
Note:
Before installing any wiring inside the Analyzer, put on a grounding strap for ESD
protection.
Note that older 900 Portable Analyzers may not have a 4-20 mA output.
Installing the Analog Outputs and Alarms
The Analyzer has three terminal blocks, arranged horizontally in the electrical enclosure inside the
Analyzer; remove the enclosure cover by loosening the set screws. Consult Tables 1 through 3
below for a list of functions on each terminal block. The output and alarm connections should be
installed by a qualified electrician.
Route the cables to the terminal strips through the pass-through port on the left side of the
bulkhead. Remove the pass-through cap by opening the Analyzer's front panel and loosening the
wing nut that secures the cover from inside the Analyzer. Secure the PVC conduit connector ("strain
relief" hub) and washer to the conduit and the Analyzer bulkhead in the normal manner. Wire
should be 22-12 AWG, rated to 300 Volts. Strip length should be 8-9 mm (.33 in). To attach the
output connections, first remove the terminal block from the I/O board by firmly grasping the
terminal block and pulling it straight out from the board (note the orientation of the terminal block
before removing). Completely loosen the screw for each pin you are connecting, insert the wire,
tighten the screw, and then gently pull on each connection to make sure the connection is secure.
Starting from the left, the terminal blocks are as follows:
1.
The first terminal block (TB2) is for alarm outputs; the maximum load for the alarm ports is
30 VDC at 1.0 A or 125 VAC at 0.5 A.
2.
The second terminal block (TB1) provides a binary output signal for use with a sample
sequencer device.
3.
The third terminal block (TB3) is for serial and 4-20 mA analog outputs; the maximum 4-20
mA load is 600 ohms.
GE Analytical Instruments ©2009
68 of 236
DLM 90488-01 Rev. A
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