User`s guide

Chapter 6 ____________________________________________________________ Technical Data
VAISALA ______________________________________________________________________ 123
Digital Transmitter WT501
Table 47 WT501 Specifications
Property Description/Value
Type Low Power Digital Transmitter running 16-bit
CPU and ADC
IP30/Nema 1 housing with screw terminals
Online configurable, parameters stored into a
non-volatile EEPROM
Features
Separately isolated power input, serial input
and RS485 I/O
Plug-in connectors 46 pcs on PCB, removable connectors with
screw terminals, 1.5 mm
2
maximum wire
Start-up voltage
12 to 50 VDC. Shut down level ≤ 10 VDC,
start-up level ≥ 10 VDC 50 V abs. max
With default configuration 15 mA @ 12 VDC
in; 7.5 mA @ 24VDC including sensors
Power consumption
With extreme configuration 50 mA @ 12 VDC
in; 25 mA @ 24 VDC
Modem module 25 mA @ 12 VDC in; 12.5 mA @ 24VDC
Power isolation 100 VDC peak (limited by a 100 V varistor to
unit case)
RS-485 isolation 100 VDC peak (limited by a 100 V varistor to
unit case)
On board Opto-isolated RS-485 (2-and 4-wire) I/O
Optional Communication module interface for non-
isolated RS-232, isolated RS-485, leased-line
modem
Modem and power Possibility to use modem connection where
power and modem data are on the same 2-
wire line.
Mounting 30 mm DIN-rail
Weight 0.4 kg (14.1 oz)
Operating temperature
-40 ... +60 °C (-40 ... 140 °F)
Storage temperature
-50 ... +70 °C (-58 ... 158 °F)
Humidity operating and
storage
2 ... 95 %RH
EMC CE compliant
Vibration According to MIL-STD-167-1