Varenr. 789-665

Jordmodstandssignalmodul; Jordfejlalarm via digital udgang; Forsyningsspænding: 24 V DC; Indbygningsbredde: 18 mm

Varenr. 789-665
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Short Description
The product signals a value falling below a non-adjustable, asymmetric isolation resistance between +24 V or 0 V of the supply voltage and ground by means of a potential-free con-tact (“Iso OK”) and status LED. The “Iso OK” contact can be evaluated via a PLC.
This status is maintained until the next measurement interval.
Operation with Grounded Control Circuit (Functional Potential Equalization)
  • The module establishes an internal connection between the 0 V (X2.2) and ground (X2.1) connections via a semiconductor switch.
  • At 10 s intervals, the connection between 0 V and ground is interrupted for 0.5 s, and the isolation resistance between +24 V (X1.3) or 0 V (X2.2) of the supply voltage and earth (X2.1) is determined.
  • The grounding connection on the module does not meet the requirements of a protective earth terminal (PE). It serves as a functional ground. The measurement method does not involve the module establishing any permanent connection bet-ween 0 V and ground.

Operation with Ungrounded Control Circuit
  • In this operating mode, the semiconductor switch to establish a connection between 0 V (X2.2) and ground (X2.1) is deactivated. At 1 s intervals, the isolation resistance offset is determined for 0.5 s.
  • The module does not meet the requirements of an isolation monitoring device per EN 61557-8.

“Iso OK” Contact
  • The potential-free contact serves the purpose of supporting evaluation (e.g., via a PLC) of looming isolation faults.
  • This contact must not be used to switch safety-related products that could cause the circuit to switch off.
Supply
Nominal supply voltage US DC 24 V (SELV)
Supply voltage range (DC) DC 18 … 31,2 V
Current consumption at supply voltage ≤ 40 mA
Power loss Pv ≤ 1,7 W
Current at ground fault (24 VDC) (max.) 56 mA
Signaling
Driftsmæssig indikation 1 x LED “Status OK” (green)
1 x LED "Status OK" (green)
Signalering 1 x LED “Iso Alarm” (red)
1 x LED “Iso Alarm” 24 V ‒ Ground (yellow)
1 x LED “Iso Alarm” 0 V ‒ Ground (yellow)
1 x Signal output “Iso OK”
1 x LED "Iso Alarm" (red)
1 x LED "Iso Alarm" 24 V ‒ Ground (yellow)
1 x LED "Iso Alarm" 0 V ‒ Ground (yellow)
1 x Signal output "Iso OK"
Iso OK Contakt
Schaltspannung max. 48 VDC (SELV)
Max. continuous current 500 mA (for general use)
Number of Iso OK contacts connected in series (max.) 25 (Limit value type: 1); 32 (Limit value type: 2 and 3) (per IEC 61131)
Funktion 1 make contact (NO); closed with applied power supply and insulation resistance > limit value
Fuse Protection
Ekstern sikring (kræves) The fuse must be placed in the output circuit of the power supply. The fuse must be adapted to the power supply used and must trip safely in case of a short circuit. The module is designed for use with a 10 A (max. ) fuse or with a 10 ADC (max.) circuit breaker (characteristic B or C).
The fuse must be placed in the output circuit of the power supply. The fuse must be adapted to the power supply used and must trip safely in case of a short circuit. The module is designed for use with a max. 10 A DC thermal or magnetic circuit breaker (characteristic B or C).
Sikkerhed og beskyttelse:
Forureningsgrad 2
Overspændingskategori II
Beskyttelsesgrad IP 20
Test voltage (supply/"Iso OK" contact) 1.5 kVAC; 50 … 60 Hz; 1 min
Mode: ungrounded control circuit
Response value for alarm at nominal supply voltage 4 kΩ (at US = 24 V, for other values of US see signaling threshold characteristic)
Response time 1 s
Hysteresis (typ.) 1
Mode: grounded control circuit
Response value for alarm at nominal supply voltage 4 kΩ (at US = 24 V, for other values of US see signaling threshold characteristic)
Response time 10 s
Hysteresis (typ.) 1
Miljøforhold
Omgivende temperatur (drift) -40 … +70 °C
Omgivende temperatur (lagring) -40 … +85 °C
Temperature range of the connecting cable according to EN 61010-2-201 ≥ (Tsurrounding air + 10 K)
Relative humidity 5 … 95 % (non condensing)
Max. operating altitude 3000 m
Tilslutningsdata
Tilslutningstype (1) X1.x
Tilslutningsteknologi Push-in CAGE CLAMP®
WAGO terminal picoMAX® eCOM
Entrådet leder 0,25 … 1,5 mm² / 24 … 14 AWG
Fleksibel leder 0,25 … 1,5 mm² / 24 … 14 AWG
Flertrådet leder med terminalrør med plastikkrave 0,25 … 0,75 mm²
Flertrådet leder med terminalrør uden plastikkrave 0,25 … 1,5 mm²
Afisoleringslængde 8 … 9 mm / 0.31 … 0.35 tomme
Tilslutningstype (2) X2.x
Tilslutningsteknologi 2 Push-in CAGE CLAMP®
WAGO terminal 2 picoMAX® eCOM
Entrådet leder (2) 0,2 … 2,5 mm² / 24 … 12 AWG
Fleksibel leder (2) 0,2 … 2,5 mm² / 24 … 14 AWG
Fleksibel leder med isoleret terminalrør (2) 0,25 … 1,5 mm² /
Fleksibel leder med uisoleret terminalrør (2) 0,25 … 2,5 mm² /
Afisoleringslængde (2) 9 … 10 mm / 0.35 … 0.39 tomme
Geometrische Daten
Bredde 18 mm / 0.71 inch
Højde 90 mm / 3.54 inch
Length from upper-edge of DIN-35 rail 51 mm / 2.01 inch
Mekaniske data
Monteringstype DIN 35-skinne
Materiale Data (engelsk)
Vægt 47 g
Standarder og specifikationer:
Konformitetsmærkning CE
EMC immunity to interference EN 61000-6-2
EMC: - udsendelse af elektromagnetiske forstyrrelser EN 61000-6-3; EN 61000-6-4
Standarder/specifikationer UL 61010-2-201
Kommercielle data
Emballeringstype BOX
Oprindelsesland CN
GTIN 4055144067200
Toldtarifnr. 85365005000
Godkendelse
Yderligere godkendelsestekst
Certifikatnavn
Sprog
Godkendelse: UL
Underwriters Laboratories Inc. (HAZARDOUS LOCATIONS)
Yderligere godkendelsestekst UL 121201
Certifikatnavn: E198726
Godkendelse
Yderligere godkendelsestekst
Certifikatnavn
Sprog
Godkendelse: UL
Underwriters Laboratories Inc. (ORDINARY LOCATIONS)
Yderligere godkendelsestekst UL 61010-2-201
Certifikatnavn: E175199