Teledyne T101, Operation Manual, Page: 149 / 375

Teledyne ML – T101 Operation Manual Remote Operation
145
Table 5-1. Status Output Pin Assignments
CONNECTOR PIN STATUS CONDITION (ON=CONDUCTING)
1
System Ok ON if no faults are present.
2 Conc Valid ON if concentration measurement is valid, OFF when invalid.
3
High Range ON if unit is in high range of any AUTO range mode.
4
Zero Cal ON whenever the instrument is in ZERO calibration mode.
5
Span Cal ON whenever the instrument is in SPAN calibration mode.
6
Diag Mode ON whenever the instrument is in DIAGNOSTIC mode.
7
Low Range ON if unit is in low range of any AUTO range mode.
8
Unused
D
Emitter Bus
The emitters of the transistors on pins 1-8 are bussed
together. For most applications, this pin should be connected
to the circuit ground of the receiving device.
+
Dc Power
+ 5 VDC source, 30 mA maximum (combined rating with
Control Inputs)
Digital Ground The ground from the analyzer’s internal, 5/±15 VDC power
supply.
5.1.1.2. Control Inputs
Control inputs allow the user to remotely initiate ZERO and SPAN calibration modes are
provided through a 10-pin connector labeled CONTROL IN on the analyzer’s rear panel.
These are opto-isolated, digital inputs that are activated when a 5 VDC signal from the
“U” pin is connected to the respective input pin.
Table 5-2. Control Input Pin Assignments
INPUT STATUS CONDITION WHEN ENABLED
A External Zero Cal Zero calibration mode is activated. The mode field of the
display will read ZERO CAL R.
B External Span Cal Span calibration mode is activated. The mode field of the
display will read SPAN CAL R.
C
External Low
Span Cal
Low span (mid-point) calibration mode is activated. The mode
field of the display will read LO CAL R.
D Unused
E Unused
F Unused
Digital Ground Provided to ground an external device (e.g., recorder).
U
DC Power For
Input Pull Ups
Input for +5 VDC required to activate inputs A - F. This voltage
can be taken from an external source or from the “+” pin.
+
In5v
Supply
Internal source of +5V which can be used to activate inputs
when connected to pin U.