PNOZ-X2.8P-777301 PILZ Safety Relay

PNOZ-X2.8P-777301-COGUMELO is the most widely used dual-channel safety relay from Pilz’s PNOZ X product line. Its core advantages cover wide 24V AC/DC operating voltage, 3Configuração de contato NO+1NC, high safety rating of SIL 3 / PL e, and ultra-fast response within ≤50ms. It is extensively deployed for various industrial safety monitoring applications. Thanks to hardwired design, it delivers superior reliability over software-based solutions under high-vibration and severe EMI conditions, making it an optimal choice for industrial automation safety protection.

Detalhamento do código do modelo

Segmento de código	Definição	Descrição detalhada
PNOZ	Prefixo da série do produto	Identifier for Pilz core safety relay product range
X	Código da série	Basic standalone safety relay of PNOZ X series, operable without extension modules
2.8	Functional code	“2” stands for dual-channel monitoring; “8” denotes automatic / monitored start mode with 3 safety outputs plus 1 auxiliary output
P	Termination type	Screw terminal version; Push-in indicates spring-cage pluggable terminals, unmarked for standard terminals
777301	Número do pedido	Unique global part number for purchasing and inventory management
COGUMELO	Brand name	Pilz GmbH & Co. KG, Alemanha

Especificações Técnicas Principais

Categoria de parâmetro	Especificação	Observações
General Data
Tipo de produto	Dual-channel safety relay	Compatível com EN ISO 13849-1 (PL e) & EM 62061 (SIL 3)
Rated Supply	24V CA/CC (±15%)	Wide-range input compatible with standard industrial power supplies
Dimensão	94×22.5×121mm (A×L×P)	22.5mm standard width for compact cabinet layout
Montagem	35mm trilho DIN (EM 60715)	Instalação vertical, torque de aperto: 0.5~0.8Nm
Características de entrada
Input Circuits	2 independent dual-channel inputs (S11-S12/S52, S21-S22)	24Em DC, 30mA input, compatible with PNP sensors
Input Function	Optional cross-contact short-circuit detection	Enabled by short-circuiting S11-S12; disabled by short-circuiting S21-S22
Características de saída
Safety Outputs	3 Normalmente aberto (NÃO) contacts with redundant dual-contact series design	Redundant structure for guaranteed safe cut-off
Auxiliary Output	1 Normalmente fechado (NC) contato	For status indication only, NOT permitted in safety circuits
Avaliação de contato	AC1:240V/6A; DC1:24V/6A	AgCuNi silver-copper-nickel contact material for arc oxidation resistance
Avaliação de contato	AC15:230V/5A; DC13:24V/5A
Parâmetros de desempenho
Tempo de resposta	≤50ms (input to output); reset time ≤100ms	Fast safety cut-off for high-speed machinery
Consumo de energia	Max.100mA	Low-power design for energy saving
Temperatura ambiente	Operação: -10°C ~ +55°C; Armazenar: -35°C ~ +70°C	Suitable for harsh industrial ambient conditions
Proteção de entrada	IP20 (corpo principal), IP40 (terminal area)	Must be installed inside control cabinet ≥IP54
Certificações	CE, CCC, UL, RoHS	Global market access certifications

III. Full Range Model List (Core PNOZ X2 Series)

Modelo	Número do pedido.	Tensão de alimentação	Configuração de saída	Start Mode	Tipo de terminal
PNOZ X2.8P	777301	24V CA/CC	3NÃO+1NC	Automático / Monitored	Parafuso
PNOZ X2.8	777300	24V CA/CC	3NÃO+1NC	Automático / Monitored	Padrão
PNOZ X2.8P PI	777302	24V CA/CC	3NÃO+1NC	Automático / Monitored	Plug-in
PNOZ X2.7P	777311	24~240V AC/DC	3NÃO+1NC	Automático / Monitored	Parafuso
PNOZ X2.7	777310	24~240V AC/DC	3NÃO+1NC	Automático / Monitored	Padrão
PNOZ X2.10P	777321	24Em DC	2NÃO+1NC	Redefinição manual	Parafuso
PNOZ X2.11P	777331	24Em DC	3NÃO+1NC	Redefinição manual	Parafuso

Cross-Brand Equivalent Replacement Table

Marca	Alternative Part	Principais diferenças	Escopo de aplicação
Schneider	Zelio SR2B121BD	Single-channel, 2NÃO+1NC, 24VDC only	Low-risk applications with limited budget
Siemens	3SK1111-1AB30	Dual-channel,3NÃO+1NC,24V CA/CC	Full drop-in replacement, SIL3 compliant
Omron	G9SA-321-T075	Dual-channel,3NÃO+1NC,24V CA/CC	Matched for Japanese-built equipment, econômico
ABB	MSR125TP	Dual-channel,3NÃO+1NC,24V CA/CC	Heavy-duty machinery with superior anti-vibration performance
Pilz Upgrade	PNOZ X2.7P (777311)	Wide voltage:24~240V AC/DC	Global projects with varying supply voltages

Ambiente de aplicação & Casos da Indústria

Aplicativos recomendados

Machinery Safety Monitoring: Emergency stop pushbuttons, safety door interlocks, safety light curtains, two-hand control stations
Fabricação Automotiva: Robôs de soldagem, coating production lines, lithium battery equipment interlock control
Electronics Assembly: SMT placement machines, AOI inspection equipment, laser cutter safety circuits
Máquinas de embalagem: Linhas de embalagem de alta velocidade, palletizing robots, over-temperature protection for heat-sealing devices
Logistics Automation: Stacker cranes, AGVs, conveyor safety door & E-stop systems

Aplicativos não recomendados

Safety systems requiring complex logic operations (PNOZmulti modular safety controller recommended)

Extreme high-vibration environments (>10g): extra vibration dampening required

Unprotected outdoor mounting (only IP20 body protection)

Casos de aplicação típicos

Case1: Lithium Battery Aging Room Safety Control for Automotive Industry

Funções: Access door interlock, emergency cut-off on over-temperature, fire protection linkage

Configuração: PNOZ X2.8P(777301)+safety door switch+temperature sensor+E-stop button

Resultado: PL e safety level achieved to prevent thermal runaway of lithium cells

Case2: Safety Circuit Retrofit for Laser Cutting Machine

Original Issue: Distributed safety PLC I/O triggered false shutdown twice in three years due to EMI interference

Solução: Replace with hardwired safety circuit using PNOZ X2.8P

Resultado: Zero breakdown over 5 anos, response optimized ≤50ms, custo de manutenção reduzido em 60%

Dicas de seleção & Regras de referência rápida

Fórmula de seleção rápida

24V AC/DC X2.8, dual-channel with three NO & one NC<br>

Terminal de parafuso 777301, automatic start with top safety grade<br>

E-stop, cortina de luz & porta de segurança, certified SIL3 & PL e<br>

DIN rail mounting saves cabinet space, fits all industrial sites

Regras de referência rápida

Model Memorization: PNOZ X2.8P = Dual-channel + Mode8 + P=screw terminals
Código do pedido:777301 = standard baseline part of Pilz X2 family
Especificações principais:24V CA/CC,3NÃO+1NC,≤50ms response,SIL3/PL e
Terminal Wiring Rules:

Short S11-S12: Activate contact short-circuit detection

Short S21-S22: Deactivate contact short-circuit detection

Short S12-S34: Enable automatic start mode

Short S52-S11: Enable automatic reset function

VII. Instalação & Diretrizes de Manutenção

Especificações de instalação

Mount vertically inside control cabinet with terminals facing upward for natural convection cooling
Maintain ≥50mm clearance from heat-generating components, ≥30mm from cabinet inner walls
Separate wiring of safety circuits and power circuits; route crossing wires at 90° to reduce EMI coupling
Install 10A fuse in series ahead of output contacts for contact protection

Common Troubleshooting Guide

Fenômeno de falha	Causa raiz	Remedial Action
Indicador de energia desligado	1. No power supply or reversed polarity	1. Verify A1/A2 wiring
Indicador de energia desligado	2. Input voltage out of tolerance	2. Confirm stable 24V AC/DC supply
Safety outputs fail to close	1. Open input circuit	1. Check continuity of S11-S12/S21-S22
Safety outputs fail to close	2. Incorrect start circuit configuration	2. Confirm jumper status of S12-S34
Contact ablation/burning	1. Overloaded output rating	1. Upgrade to higher-rated relay
Contact ablation/burning	2. Missing snubber for inductive loads	2. Fit freewheeling diode(CC) or varistor(AC) in parallel
Unexpected false tripping	1. Electromagnetic interference on input lines	1. Apply shielded cable with proper grounding
Unexpected false tripping	2. Misconfigured short-circuit detection	2. Adjust S11-S12/S21-S22 jumper setup