Carbon Monoxide Alarm User Manual

2 Installation Model 7300A
2-4
Teledyne Analytical Instruments
2.3.1 Primary Input Power
The power cord receptacle and fuse block are located in the same
assembly. Insert the power cord into the power cord receptacle.
DANGER: POWER IS APPLIED TO THE INSTRUMENT'S CIR-
CUITRY AS LONG AS THE INSTRUMENT IS CON-
NECTED TO THE POWER SOURCE. THE STANDBY
ON THE FRONT PANEL IS FOR SWITCHING
POWER ON OR OFF TO THE DISPLAYS AND OUT-
PUTS ONLY.
The standard power supply requires a 110 V ac, 50-60 Hz power source,
or 220 V ac, 50-60 Hz power (optional).
2.3.2 Fuse Installation
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.
2.3.3 50-Pin Equipment Interface Connector
Figure 2-1 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.
Figure 2-1: Equipment Interface Connector Pin Arrangement
2.3.3.1 Analog Outputs
There are four DC output signal pins—two pins per output. For polar-
ity, see Table 3-1. The outputs are:
0–1 V dc % of Range: Voltage rises linearly with increasing concentration,
from 0 V at 0 concentration to 1 V at full scale.
(Full scale = 100% of programmable range.)
0–1 V dc Range ID: 0.25 V = Range 1, 0.5 V = Range 2, 0.75 V =
Range 3, 1 V = Cal Range.