PDW90 Point to Multi-Point Wireless Instruction Manual
16
Signal Connector
The analog input may be either 4-20 mA, 0-10 V, 0-5 V, or 1-5 V.
The appropriate input type must be programmed for each unit.
Once the appropriate input type has been programmed, wire the
analog signal source to the device as shown in the diagram at
right.
The analog input will not interfere with any existing HART signal
on a 4-20 mA current loop. However, the HART signal
will not
be
transmitted wirelessly.
4-20 mA Output Connector
The 4-20 mA output corresponds with the analog input signal on
the paired wireless device. The analog output signal is always
4-20 mA, regardless of the input type on the other wireless mod-
ule.
For instance, if the analog input type on the first device was
0-10 V and the input value was 5 V, the second device would
output 12 mA.
Connect the
mA OUT
terminals to a device scaled to read a
4-20 mA signal.
The analog output is internally powered; no external power
supply is required.
Digital I/O Connector
All digital connections are referenced to ground. The base
station I/O settings determine the I/O settings of the field units
(e.g. if D1 of the base station is an input then it can only be
mapped to a digital output of a field unit).
Note: Each connection may be set independently in the de-
vice settings as either an input or an output. In the dia-
gram to the right, D4 & D3 are digital inputs and D2 is a
digital output.
Figure 14. Field Unit Analog
Input Connection
Figure 15. Field Unit
4-20 mA Output Connection
Figure 16. Field Unit Digital I/O
Connection
Voltage or
Current Signal
Source
4-20 mA Input
Display, Chart
Recorder, Etc.
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