Connection To Other Devices - Teledyne 4700 Serivce Manual

4700 Refrigerated Sampler Service Guide
Section 1 Introduction and General Guidelines
1.3 Connection to Other
Devices
Figure 1-1 16-pin rear connector
Pin Signal Name
1 12 VDC Power
2 Ground
3 Flow Pulse
4 Serial Data
5 Event Mark
b
6 Enable Pin
7 12 VDC
c
8 Alarm 1
c
9 Alarm 2
c
10 Alarm 3
c
11 Alarm 4
12 Analog 4-20 mA (+) Input
13 Analog 4-20 mA (–) Input
14 Ground
1-4
Table 1-2 lists the pin functions of the sampler's rear connector,
for connection to external devices.
Table 1-2 4700 Connector Pin Functions
Sampler
Input/Output
Output
N/A
Input
Output
Output
Input
Output
Output
Output
Output
Output
N/A
Parameters/Comments
+12.5 VDC, 1 ampere maximum. Power for external
devices.
Common ground
25 millisecond (minimum) pulse, +5 to +15 VDC
For use with PC connections. Cable 69-4704-042 is
recommended. See section 4.3.2.
3 second, +12 VDC pulse at beginning of sample
collection
Ground this input (short to pin 2) to disable sampler
operation. Leave this input open (floating) to collect
samples.
+12.5 VDC, 1 ampere maximum. Power for external
devices.
Alarm Off = 0 VDC, Alarm On = +5 VDC
Alarm Off = 0 VDC, Alarm On = +5 VDC
Alarm Off = 0 VDC, Alarm On = +5 VDC
Alarm Off = 0 VDC, Alarm On = +5 VDC
Linear current loop signal representing minimum
flow rate at 4 mA, maximum flow rate at 20 mA.
This input is paired with pin 13.
See pin 12.
Common ground. Same as pin 2.
a