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Installation
1-9
September 2004
Wiring Transducers (cont.)
4.
For a 2-Channel AT868, repeat steps 1-3 to connect the CH2
transducers to the
DN
and
UP
terminal block for Channel 2.
Note:
It is not required that both channels of a 2-Channel unit be
connected.
5.
Do one of the following:
•
Proceed to another section to continue wiring the AT868.
•
Reinstall the plastic shroud, replace the front cover on the
enclosure and tighten the screws.
IMPORTANT:
Each channel must be activated before it can begin
taking measurements. See Chapter 2,
Programming
Site Data
, for instructions.
Wiring Standard
0/4-20 mA Analog
Outputs
The AT868 has one isolated 0/4-20 mA analog output per channel
(designated as
Output A
and
Output C
). These outputs can be
configured independently. Typically, Output A is used for Channel 1
and Output C is used for Channel 2. However, either analog output
can be configured for use with either channel.
Connections to the analog outputs may be made with standard
twisted-pair wiring, but the current loop impedance for these circuits
must not exceed 600 ohms. To wire the analog outputs, complete the
following steps:
1.
Refer to
Figure 1-5
on page 1-16 for the locations of the
appropriate terminal blocks and wire the analog outputs as shown.
Then, secure the cable clamp.
IMPORTANT:
Outputs 1 and 2 in the wiring diagram correspond to
Outputs A and C in the AT868 software.
2.
Do one of the following:
•
Proceed to another section to continue wiring the AT868.
•
Reinstall the plastic shroud, replace the front cover on the
enclosure and tighten the screws.
IMPORTANT:
Prior to use, the analog outputs must be calibrated as
described in Chapter 4,
Calibration
.
Summary of Contents for AquaTrans AT868
Page 7: ...Chapter 1...
Page 25: ...Chapter 2...
Page 45: ...Chapter 3...
Page 50: ...Chapter 4...
Page 56: ...Appendix A...
Page 62: ...Appendix B...
Page 63: ...Measuring P and L Dimensions Measuring P and L B 1...