WR-90 Point to Multi-Point Wireless Instruction Manual
6
Specifications
Except where noted all specifications apply to operation at +25°C.
WR-90 Base Station Specifications
General
Maximum
Connected
Field Units
32 field units
Network ID
Programmable: 0 - 99
Programming
Methods
Via PC with WR Manager software
Power
24 VDC ±10%, 36 W max, 2.4 W
min; Power consumption is
dependent on type and number of
modules installed
Non-Volatile
Memory
All programmed settings are stored
in non-volatile memory for a
minimum of ten years if power is
lost.
Environmental
Operating temp. range: -40 to 65°C
Storage temp. range: -40 to 85°C
Relative humidity: 0 to 90% non-
condensing
Connections
Removable screw terminal blocks
accept 12 to 22 AWG wire.
Peak Antenna
Gain
2.15 dBi ± 1.0
Enclosure
15.75" x 11.81" x 7.03" (40 cm x 30
cm x 17.9 cm) (W x H x D);
NEMA 4X; Thermoplastic Polyester;
Color: Gray
Tightening
Torque
Screw terminal connectors: 5 lb-in
(0.56 Nm)
Shipping
Dimensions
17" x 14" x 9" (43.2 cm x 35.6 cm x
22.9 cm) (W x H X D)
Shipping
Weight
6.5 lbs (2.95 kg)
Warranty
3 years parts & labor
Dual Analog Inputs Module
Inputs
Field selectable: 4-20 mA, 0-10 V,
0-5 V, 1-5 V
Accuracy
±0.03% of calibrated span ±1 count
Isolation
500 V
Recalibration
All ranges are calibrated at the
factory. Recalibration is
recommended at least every
12 months.
Temperature
Drift
0.005% of calibrated span/
°
C max
from 0 to 65
°
C ambient,
0.01% of calibrated span/
°
C max
from -40 to 0
°
C ambient
Signal Loss
Inputs will remain off (open circuit)
until wireless units are reconnected.
Input
Impedance
Voltage ranges: greater than
110 k
W
Current ranges: less than 220
W
HART
Transparency
Analog input will not interfere with
existing HART communications on
the wired 4-20 mA signal
Dual 4-20 mA Outputs Module
Output Source
Analog input from connected
wireless unit
Calibration
Factory calibrated:
4.000 to 20.000 = 4-20 mA output
Accuracy
± 0.1% of span ± 0.004 mA
Isolation
500 V
Temperature
Drift
0.4 µA/
°
C max from 0 to 65
°
C
ambient, 0.8 µA/
°
C max from -40 to
0
°
C ambient.
Loop Power
Supply
Internally powered; no external
supply needed
Output Loop
Resistance
Power supply Minimum Maximum
24 VDC
10
W
900
W
Signal Loss
After approximately 25 seconds of
trying to reconnect, mA output will
become 3.2 mA
Digital Input / Output Module
Channels
Four (4) digital connections,
independently field selectable as
either inputs or outputs
DI Logic High
3 to 5 VDC
DI Logic Low
0 to 1.1 VDC
DI Contact
Dry contact to ground can be used
to activate the input
DO Logic High
3 to 5 VDC
DO Logic Low
0 to 0.4 VDC
Source
Current
10 mA maximum output current
Sink Current
1.5 mA minimum input current
Signal Loss
Digital output goes to logic high
Dual Relays Module
Rating
2 SPDT (Form C); rated 3 A @
30 VDC and 125/250 VAC resistive
load; 1/14 HP (≈ 50 W) @ 125/250
VAC for inductive loads
Noise
Suppression
Noise suppression is recommended
for each relay contact switching
inductive loads; see page 12 for
details.
Initialization
After power failure, relays will
initialize to default state before
reconnecting to wireless units.
Signal Loss
If mapped to digital input channel,
the relay energizes.
