Item n.º 789-665

Ground resistance signaling module; Iso OK contact; Supply voltage 24 VDC; Module width 18 mm

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Attention: Product details may be subject to change
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.

Detalhes Técnicos

Detalhes
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
Signaling
Indicação operacional integrada 1 x LED "Status OK" (green)
Sinalização 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
Max. switching voltage DC 48 V
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) (acc. to IEC 61131)
Function 1 make contact (NO); closed with applied power supply and insulation resistance > limit value
Fuse Protection
Fusível externo (exigido) 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).
Segurança e proteção:
Grau de poluição 2
Categoria de sobretensão II
Grau de proteção IP20
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
Test voltage (supply/"Iso OK" contact) 1.5 kVAC; 50 … 60 Hz; 1 min
Current at ground fault (24 VDC) (max.) 56 mA
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
Condições ambientais
Temperatura (operacional) do ambiente -40 … +70 °C
Temperatura ambiente (armazenamento) -40 … +85 °C
Relative humidity 5 … 95 % (non condensing)
Max. operating altitude 3000 m
Dados de conexão
Tipo de conexão (1) X1.x
Tecnologia de conexão Push-in CAGE CLAMP®
WAGO terminal picoMAX® eCOM
Condutor sólido 0,25 … 1,5 mm² / 24 … 14 AWG
Condutor flexível 0,25 … 1,5 mm² / 24 … 14 AWG
Condutor flexível com ponteira com colar plástico 0,25 … 0,75 mm²
Condutor flexível com ponteira sem colar plástico 0,25 … 1,5 mm²
Comprimento do desencape 8 … 9 mm / 0.31 … 0.35 polegada
Tipo de conexão (2) X2.x
Tecnologia de conexão 2 Push-in CAGE CLAMP®
WAGO terminal 2 picoMAX® eCOM
Condutor sólido (2) 0,2 … 2,5 mm² / 24 … 12 AWG
Condutor flexível (2) 0,2 … 2,5 mm² / 24 … 14 AWG
Condutor flexível com ponteira isolada (2) 0,25 … 1,5 mm² /
Condutor flexível com ponteira sem isolamento (2) 0,25 … 2,5 mm² /
Comprimento do desencape (2) 9 … 10 mm / 0.35 … 0.39 polegada
Dados geométricos
Largura 18 mm / 0.71 inch
Altura 90 mm / 3.54 inch
Length from upper-edge of DIN-35 rail 51 mm / 2.01 inch
Dados mecânicos
Tipo de montagem Trilho DIN 35
Padrões e especificações:
Identificação de conformidade CE
À prova de interferências EMC EN 61000-6-2
EMC: 1 - emissão de interferência EN 61000-6-3; EN 61000-6-4
Padrões/especificações UL 61010-2-201