Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 35)

Total Hydrocarbon Analyzer Installation
Teledyne Analytical Instruments 17
3.3.3 Electrical Connections
Figure 3-1 shows the Model 4020 rear panel. There are connections
for power, digital communications, and both digital and analog
concentration output.
For safe connections, no uninsulated wiring should be able to come
in contact with fingers, tools or clothing during normal operation.
CAUTION: USE SHIELDED CABLES. ALSO, USE PLUGS THAT
PROVIDE EXCELLENT EMI/RFI PROTECTION. THE
PLUG CASE MUST BE CONNECTED TO THE CABLE
SHIELD, AND IT MUST BE TIGHTLY FASTENED TO
THE ANALYZER WITH ITS FASTENING SCREWS.
ULTIMATELY, IT IS THE INSTALLER WHO ENSURES
THAT THE CONNECTIONS PROVIDE ADEQUATE
EMI/RFI SIELDING.
3.3.3.1 P RIMARY I NPUT P OWER
The power cord receptacle and fuse block are located in the same
assembly. Insert the power cord into the power cord receptacle.
CAUTION: POWER IS APPLIED TO THE INSTRUMENT'S
CIRCUITRY AS LONG AS THE INSTRUMENT IS
CONNECTED TO THE POWER SOURCE.
The standard power supply requires 110 VAC, 50/60 Hz or 220
VAC, 50/60 Hz (optional) power.
3.3.3.2 F USE I NSTALLATION
The fuse block, at the right of the power cord receptacle, accepts US
or European size fuses. A jumper replaces the fuse in whichever fuse
receptacle is not used.
3.3.3.3 50-P IN E QUIPMENT I NTERFACE C ONNECTOR
Figure 3-2 shows the pin layout of the Equipment Interface
connector. The arrangement is shown as seen when the viewer faces the
rear panel of the analyzer. The pin numbers for each input/output
function are given where each function is described in the paragraphs
below.