Table of Contents
Advertisement
Operating Instructions
4.15.1.2. CONTROL INPUTS
Table 4-24: Control Input Pin Assignments
INPUT
STATUS
EXTERNAL ZERO
A
EXTERNAL SPAN
B
C
D
E
F
DIGITAL GROUND
DC power for Input
U
+
Internal +5V Supply
A
B
C
D
Z
S
E
P
R
A
O
N
Local Power Connections
154
These inputs allow the user to remotely initiate Zero and Span calibrations. Two
methods for energizing the inputs is provided below; the first using the internal
+5V available on the CONTROL IN connector and the second, if an external,
isolated supply is employed.
Zero calibration mode is activated. The mode field of the display will
CAL
read ZERO CAL R.
Span calibration mode is activated. The mode field of the display will
CAL
read SPAN CAL R.
Unused
Unused
Unused
Unused
Provided to ground an external device (e.g., recorder).
Input for +5 VDC required to activate inputs A - F. This voltage can be
pull ups
taken from an external source or from the "+" pin.
Internal source of +5V which can be used to activate inputs when
connected to pin U.
There are two methods to activate control inputs. The internal +5V available
from the "+" pin is the most convenient method (Figure 4-14, left). However, to
ensure that these inputs are truly isolated, a separate, external 5 VDC power
supply (Figure 4-14, right) should be used.
CONTROL IN
E
F
U
+
Figure 4-14:
Teledyne API Model T360/T360M Operation Manual
CONDITION WHEN ENABLED
CONTROL IN
A
B
C
D
E
Z
S
E
P
R
A
O
N
-
5 VDC Power
Supply
External Power Connections
Control Inputs
F
U
+
+
07272B DCN6552
Advertisement
Table of Contents
