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RMD681

8 channel universal input transmitter with analog and RS-485 serial output

Manufacturer

Nokeval

Article

92506

RMD681 is an 8 channel measurement unit for temperature sensors and process inputs. The unit has both one analog and serial outputs. The analog output can be selected among the input channels using digital inputs. Every channel has two alarm levels controlling two common alarm relays. The inputs are galvanically isolated from the outputs and the supply voltage, but not from each other. Configuration can be done also with serial RS485 bus.

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Input details

inputs

KTY83
mA, mV, Ohm, Pt100, Pt1000, thermocouples, V


input channels

8


measuring rate

12...25 channels / s

Output details

output channels

1


special functions

binary input selects measurement channel to output


outputs

mA, V


alarm relays

2

Connection details

connector model

1.5mm², detachable


bus interface

RS-485


bus protocol

Modbus RTU
Nokeval SCL


baud rates

1200, 2400, 4800, 9600, 19200, 38400, 57600

Display details

display color

red


number of digits

5 + 2


display

7 segment LED


indicator lights

configuration state, alarms, serial communication and fault


digit size

7 mm

Power supply

current consumption

< 100 mA


supply voltage

24 VDC: 20...28 VDC

General information

weight

320 g


dimensions

150 x 100 x 60 mm (WHD)


installation

35 mm DIN rail


minimum ambient temperature

-10°C


case material

plastic


maximum ambient temperature

60°C

8 x Input: thermocouples, Pt100, 0/4-20 mA, 0-5/10V, mV Output: serial RS485 bus, 4 bit multiplexer for 4-20 mA output Power supply: 24 VDC