URx20xS – Gas detectors with 4÷20 mA output and 4 relay outputs – ATEX Ex nA

ATEX Ex nA certified gas detector with operating status LED, to warn of gas alarms through 4÷20 mA analogue output or at threshold limit setpoints (pre-alarm, level 1 and 2 alarms, fail) that can be freely selected using 4 relay outputs (with optional card UZR20.4 ).

Power supply: 11÷28 Vdc
Signal outputs: 4÷20 mA
Command outputs: 4 SPDT relays (with card UZR20.4)
Sensor: S (Standard) or P (Professional)
Protection mode: ATEX II 3G Ex nA nC d IIC T6 Gb
Ambient temp.: -20 °C/+50 °C

UR.20PS

Professional sensor(P)

URB20PS GASOLINE VAPOUR (B)
URC20PS PROPANE (C)
URE20PS ETHYL ALCOHOL (E)
URG20PS METHANE (G)
URI20PS HYDROGEN (I)
URL20PS ACETYLENE (L)
URM20PS AMMONIA (M)
URO20PS CARBON MONOXIDE (O)
URP20PS LPG (P)
URT20PS OCTANE (T)

UR.20SS

Standard sensor(S)

URB20SS GASOLINE VAPOUR (B)
URC20SS PROPANE (C)
URE20SS ETHYL ALCOHOL (E)
URG20SS METHANE (G)
URI20SS HYDROGEN (I)
URL20SS ACETYLENE (L)
URM20SS AMMONIA (M)
URO20SS CARBON MONOXIDE (O)
URP20SS LPG (P)
URT20SS OCTANE (T)

URD20SS & URS20SS

Standard sensor(S)

URD20SS CARBON DIOXIDE (D)
URS20SS OXIGEN (S)

UZR20.4

Relay card for URx20xx detectors

4 SPDT relays 50 mA at 24Vac/dc 100 mA at 12Vac/dc

UZS20.x

Module with n. 1 opto-isolated resistive output (two wires)

UZS20.E

  • 22KOhm = normal operation
  • 10Kohm = pre-alarm
  • 2,2KOhm = alarm threshold 1
  • open = failure

UZS20.A

  • 27KOhm = normal operation
  • 10KOhm = alarm threshold 1
  • open = failure

UZS20.S

  • 27KOhm = normal operation
  • 0 Ohm = alarm threshold 1
  • open = failure