WR-90 Point to Multi-Point Wireless Instruction Manual
11
Power Connector
Power connections are made to a two-terminal connector labeled
POWER in Figure 1.
Make sure that the power supply can provide 24 VDC to the
wireless base station.
Analog Input Connector
The analog input module can accept either 4-20 mA, 0-10 V, 0-5 V,
or 1-5 V. The appropriate input type must be independently
programmed for each input channel.
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.
Analog Output Connector
The mA output module can be programmed to output a 4-20mA
analog signal associated with a remote field unit’s analog input or
Modbus register.
The signal can be transmitted to any device scaled to read a 4-20
mA signal as shown at right. The analog output is internally powered;
no external power supply is required.
Digital I/O Connector
The digital input module includes four independently programmable
I/O channels. All digital connections are referenced to ground; digital
input connections have an internal pull-up resistor. Each connection
may be set as either an input or an output.
In the diagram to the right, D3 is a digital input and D4 is a digital
output.
Figure 2. Base Station
Power Connection
Figure 3. Base Station
Analog Input Connection
Figure 4. Base Station
Digital I/O Connection
Figure 5. Base Station
Analog Output Connection
V+ mA G
1
2
ANALOG INPUT
V+ mA G
Current Signal
Source
Voltage Signal
Source
I+
G I+
G
1
2
mA OUTPUT
4-20 mA
Input Device
+5 1 2 3 4 GND
DIGITAL I/O
