Teledyne T200, Operation Manual, Page: 40 / 425

Getting Started Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual
38
3.3.1.6. CONNECTING THE CONTROL INPUTS
Three digital control inputs, through the rear panel CONTROL IN connector, can be
used to remotely activate the zero and span calibration modes (see Section 9.1.2.4).
Energize the Control Inputs either bythe in5V available from the pin labeled “+”
(more convenient), or by a separate external 5 VDC power supply (ensures that these
inputs are truly isolated). Refer to Figure 3-11.
CONTROL IN
A B C D E F U
+
SP
A
N
Z
ERO
CONTROL IN
A B C D E F U
+
SP
A
N
Z
ERO
- +
5 VDC Power
Supply
Local Power Connections
External Power Connections
Figure 3-11: Energizing the T200 Control Inputs
Table 3-7: Control Input Pin Assignments
Input #
Status
Definition
ON Condition
A
REMOTE
ZERO CAL
The Analyzer is placed in Zero Calibration mode. The mode field of the display will
read
ZERO CAL R
.
B
REMOTE
SPAN CAL
The Analyzer is placed in Lo Span Calibration mode. The mode field of the display will
read
SPAN CAL R
.
C, D, E
& F
Spare
Digital Ground
The ground level from the analyzer’s internal DC Power Supplies (same as chassis
ground).
U
External Power
input
Input pin for +5 VDC required to activate pins A – F.
+
5 VDC output
Internally generated 5V DC power. To activate inputs A – F, place a jumper between
this pin and the “U” pin. The maximum amperage through this port is 300 mA
(combined with the analog output supply, if used).
06858E DCN7057