Teledyne T100 用户手册

In its standard configuration, the analyzer comes with all four of these channels set up to 
output a DC voltage. However, 4-20mA current loop drivers can be purchased for the 
first two of these outputs (A1 and A2). Refer to Sections 1.4 (Option 41), 3.3.1.3 and 
5.9.3.5. 

Output Loop-back: All three of the functioning analog outputs are connected back to 
the A/D converter through a Loop-back circuit. This permits the voltage outputs to be 
calibrated by the CPU without need for any additional tools or fixtures (refer to Section 
5.9.3.2). 

This External Digital I/O performs two functions. 

STATUS OUTPUTS: Logic-Level voltages are output through an optically isolated 8-
pin connector located on the rear panel of the analyzer. These outputs convey good/bad 
and on/off information about certain analyzer conditions. They can be used to interface 
with certain types of programmable devices (refer to Section 8.1.1).  

CONTROL INPUTS: By applying +5VDC power supplied from an external source 
such as a PLC or Data logger (refer to Section 8.1.2), Zero and Span calibrations can be 
initiated by contact closures on the rear panel.  

I

2

C is a two-wire, clocked, bi-directional, digital serial I/O bus that is used widely in 

commercial and consumer electronic systems. A transceiver on the Motherboard 
converts data and control signals from the PC-104 bus to I

2

C. The data is then fed to the 

relay board and optional analog input circuitry.  

This circuit monitors the +5V power supply during start-up and sets the Analog outputs, 
External Digital I/O ports, and I

2

C circuitry to specific values until the CPU boots and 

the instrument software can establish control.  

The analyzer operates on 100 VAC, 115 VAC or 230 VAC power at either 50Hz or 
60Hz. Individual units are set up at the factory to accept any combination of these five 
attributes. As illustrated in Figure 13-22 below, power enters the analyzer through a 
standard IEC 320 power receptacle located on the rear panel of the instrument. From 
there it is routed through the ON/OFF switch located in the lower right corner of the 
front panel.  

AC line power is stepped down and converted to DC power by two DC power supplies. 
One supplies +12 VDC, for various valves and valve options, while a second supply 
provides +5 VDC and ±15 VDC for logic and analog circuitry as well as the TEC 
cooler. All AC and DC Voltages are distributed through the relay board.  

A 6.75 ampere circuit breaker is built into the ON/OFF switch. In case of a wiring fault 
or incorrect supply power, the circuit breaker will automatically turn off the analyzer.  

 

06807C DCN6650