Contator,disjuntor,sensor,Codificador,CLP,Conversor
Modicon TM2 Discrete Output Expansion Module, for M238 / M241 PLC, Fim da vida
Designação completa: TM2DDO8TT, 8-point 24VDC Source (PNP) transistor output module, removable screw terminal block
- Definição de código de modelo
TM2: TM2 series expansion I/O (Compatible with M218 / M238 / M241)
D: Digital
FAZER: Saída digital
8: 8 canais
T: Transistor
T: Saída de origem (PNP); UT = Sink output (NPN)
- Principais especificações elétricas
| Item | Especificação |
| Tipo de saída | 24VDC PNP Source Transistor |
| Canais | 8 pontos, shared 1 terminal comum |
| Rated current per channel | 0.5A/ponto; Max total current of common terminal: 4UM |
| Faixa de tensão operacional | 20.4 ~ 28.8 CCV |
| Tempo de resposta | 450µs (rise / fall) |
| Queda de tensão | Max 0.4V |
| Leakage current | ≤0.1mA |
| Max inductive load | 10mH; Tungsten lamp load:12C |
| Proteção | Per-channel short-circuit & proteção contra sobrecarga, recuperação automática |
| Isolamento | Channel ↔ PLC internal bus: 500Vac for 1min; Sem isolamento entre canais |
| terminal | Removable screw terminal block |
| Montagem | 35mm trilho DIN |
| Peso | 0.085kg |
| Dimensões | W27.3 × H90 × D84.6 mm |
- Compatibilidade & End-of-Life Information
- CPU compatível: Modicon M218 / M238 / M241 PLC (TM2 local expansion); Not applicable for M221/M251
- EOL Status: Officially discontinued by Schneider sobre 27 Setembro 2024. Nenhuma nova unidade original disponível, apenas estoque / second-hand modules on market.
- Substituição recomendada: TM3DQ8T (TM3 series, 8-point Source transistor output, compatible with M221/M241/M251)
⚠️ Nota: TM2 and TM3 bus hardware are not interchangeable. Direct replacement requires PLC backplane / expansion architecture modification.
- Same Series Selection Reference
TM2DDO8TT: 8FAZER, Fonte PNP, 0.5UM, terminal de parafuso (EOL)
TM2DDO8UT: 8FAZER, Dissipador NPN, 0.3UM, terminal de parafuso (EOL)
- Aplicativo & Notas de fiação
- PNP Source Output: Output terminal provides +24V; negative side of load connects to 0V. Suitable for solenoid valves, luzes indicadoras, load connected to 0V.
- Para cargas indutivas (válvulas solenóides), freewheeling diode is recommended to protect transistors.
- TM2 expansion modules must be installed at the end of local expansion bus, cannot be placed before TM3 expansion modules.
- Onboard LED channel status indicators for commissioning and troubleshooting.
- Solução de problemas de falhas (Second-hand Module Inspection)
- Power on and check module power LED and bus communication LED.
- Test each output channel sequentially: When PLC output = ON, measure 24V at terminal; voltage drops when OFF.
- Short-circuit protection test: Short output to 0V, channel should cut off output automatically; output recovers once short circuit removed.
- Measure off-state leakage current to judge transistor aging.
- Inspect removable terminals for burn marks and deformed copper contacts.
- HS Code Reference
8537101100 (Programmable Controller I/O Expansion Module)
Replacement Options for TM2DDO8TT (8-point 24VDC PNP Source, TM2 Bus)
Módulo original: TM2DDO8TT, TM2 bus, only for M218/M238/M241, EOL; TM2 bus and TM3 bus hardware cannot be swapped directly. 3 categories for selection:
Caso 1: Keep existing M218/M238/M241 CPU, only replace expansion module
TM3 modules cannot be used. Although M241 supports both TM2+TM3 bus, TM2 modules must be installed after TM3 modules. Mixed installation is not recommended for long-term engineering use. If you need direct plug-in on TM2 expansion bus: only surplus / used TM2DDO8TT available. Schneider has no new equivalent module on TM2 bus.
Alternative spare within same EOL series: No other TM2 8-point Source DO. Only TM2DDO8UT (Dissipador NPN) disponível, cannot directly swap, opposite output logic.
Caso 2: Full PLC Upgrade (Recommended for new project / major overhaul, official replacement: TM3 series)
✅ TM3DQ8T [Recomendação principal]
Especificações: 8-point 24VDC PNP Source transistor, 0.5Um por canal, removable screw terminal
Compare with TM2DDO8TT: Same channel count, output type and per-channel current; Bus type is TM3, not TM2
CPU compatível: M221 / M241 / M251 / M262
Modification effort:
- Original M241: TM3 expansion bus supported, but IO address must be reconfigured in EcoStruxure Machine Expert, IO mapping modification required in program.
- Original M218/M238: Does not support TM3 modules, CPU must be upgraded to M241/M251 together.
Other TM3 Alternatives (Same TM3 Bus)
- TM3DQ8TG: 8-point PNP Source, terminal de mola, electrical parameters same as TM3DQ8T, only wiring terminal difference
- TM3DQ16T: 16-point PNP Source, 0.5UM; spare IO channels, suitable for projects with IO reservation
Caso3: Distributed Remote IO Replacement (Keep original CPU, no local bus modification, ideal for legacy retrofit)
Advantys OTB remote IO, communicate via Modbus RTU to original PLC, independent IO station, does not occupy TM2 local expansion port
- OTB1C08T: 8-point 24V PNP Source transistor output, Modbus RTU, terminal de parafuso
Pros: No modification to original local expansion bus, only add Modbus read/write logic, independent installation inside cabinet. Suitable for limited cabinet space, no change to existing expansion chain.
Cons: Modbus communication program required, response speed slightly slower than local expansion module.
Caso4: Substituição Compatível Doméstica (Cost-saving option, Modbus Remote IO)
Domestic Modbus RTU remote 8-channel PNP transistor output modules (Inovação, Xinje, Lansen etc.), funcionalmente equivalente, connect to M218/M238/M241 via Modbus. For projects with tight budget.
Selection Comparison Table
| Modelo de substituição | Tipo de saída | Atual por canal | Tipo de ônibus | CLP compatível | Modification Workload |
| TM2DDO8TT (Original) | Fonte PNP | 0.5UM | TM2 Local Bus | M218/M238/M241 | EOL, apenas estoque / usado |
| TM3DQ8T (Oficial recomendado) | Fonte PNP | 0.5UM | TM3 Local Bus | M241/M251/M221/M262 | ★★★☆ Reconfigure IO address & PLC program |
| OTB1C08T | Fonte PNP | 0.5UM | Modbus RTU Remote IO | M218/M238/M241 (No CPU change) | ★★☆ Add Modbus communication program |
⚠️ Critical Retrofit Notes
- TM2 bus and TM3 bus have different hardware connectors, cannot hot-swap directly. When mixing TM2+TM3 on M241, TM2 modules must be placed after TM3 modules; long-term mixed configuration is not recommended in engineering.
- TM2DDO8TT is PNP Source. Never select NPN Sink model (TM3DQ8U / TM2DDO8UT), opposite output logic, load will not operate after wiring.
- TM3DQ8T has different common terminal and pin assignment from TM2DDO8TT, field secondary wiring cannot reuse the original terminal plug directly; rewiring required.
Schneider TM3DQ8T (Common miswriting: TM3DO8T)
Modicon TM3 discrete expansion output module, 8-point 24VDC PNP Source transistor output, removable screw terminal, official recommended replacement for TM2DDO8TT
- Definição de código de modelo
TM3: TM3 series local expansion I/O module
DQ: Discrete Output
8: 8 canais
T: Transistor PNP Source output (Terminal de parafuso)
TM3DQ8TG = identical electrical parameters, spring cage terminal version
- Especificações elétricas principais
| Item | Especificação |
| Tipo de saída | 24VDC PNP Source (lógica positiva) Transistor |
| Quantidade de canais | 8 pontos, shared one common terminal |
| Rated current per channel | 0.5A/canal |
| Max total current of common terminal | 4UM (Total limit for 8 canais) |
| Output supply voltage | 20.4 ~ 28.8 CCV (nominal 24VDC) |
| Queda de tensão | ≤0.4V |
| Corrente de fuga fora do estado | ≤0.1mA |
| Tempo de resposta | Max 450µs (rise / fall) |
| Frequência máxima de comutação (carga resistiva) | 100Hz |
| Max incandescent lamp load | 12C |
| Carga indutiva | External freewheeling diode recommended; typical clamping voltage 50VDC |
| Proteção contra curto-circuito | Per-channel independent short-circuit / proteção contra sobrecarga; auto-recovery after fault removal |
| Isolation rating | Module bus ↔ output channel: 500Vac, 1min withstand; Sem isolamento entre canais |
| Bus power supply | 5V supplied by TM3 expansion bus; 24V for output loop must be wired separately |
| 5V bus consumption | DESLIGADO:5mA; SOBRE:10mA; 24V field circuit: OFF=0mA, ON max 20mA |
- Mecânico & Especificações Ambientais
| Item | Especificação |
| Montagem | 35mm DIN rail TH35-7.5 / TH35-15, or panel screw mounting |
| Dimensão geral | W27.4 × H90 × D84.6 mm |
| Peso líquido | Aprox.. 0.076kg |
| Classe de proteção | IP20 (Somente para instalação em gabinete) |
| terminal | Removable screw terminal block, 5.08mm pitch; Arame:0.2~2,5 mm² (24~14AWG) |
| Temperatura operacional | Montagem horizontal: -10 ~ +55℃; Montagem vertical: -10 ~ +35℃ |
| Temperatura de armazenamento | -25 ~ +70℃ |
| Umidade relativa | 10~95%, sem condensação |
| Max working altitude | 2000eu |
| Grau de poluição | 2 |
| Resistência à vibração | 5~8.4Hz:3.5milímetros; 8.4~150Hz:3g |
| Resistência ao choque | 15g,11EM |
| LED indicador | 1 green LED per channel to display ON/OFF state |
| Certificações | CE, cULus, UKCA, RCM, CCC |
- Compatibilidade CLP
Works with Modicon M221 / M241 / M251 / M262
❗ M218, M238 do NOT support TM3 modules, cannot extend TM3DQ8T directly.
- Comparison vs Original TM2DDO8TT (Chave)
| Parâmetro | TM2DDO8TT | TM3DQ8T |
| Saída | PNP Source 0.5A, 8-point common terminal | PNP Source 0.5A, 8-point common terminal |
| Max total common current | 4UM | 4UM |
| Tempo de resposta | 450碌s | 450碌s |
| Withstand isolation | 500Vac | 500Vac |
| Ônibus | TM2 Bus (M218/M238/M241) | TM3 Bus (M221/M241/M251/M262) |
| Dimensões | W27.3 脳 H90 脳 D84.6mm | W27.4 脳 H90 脳 D84.6mm |
| Layout do terminal | Different pin assignment, secondary wiring cannot reuse terminal plug directly | Different pin assignment, secondary wiring cannot reuse terminal plug directly |
- Notas de fiação
- Fonte PNP: Output terminal provides +24V, load other end connects to 0V; suitable for solenoid valves and indicator lamps.
- 8 channels share one common power terminal, external +24V connects to common terminal.
- Para cargas indutivas (válvulas solenóides), freewheeling diode must be paralleled to absorb back EMF and protect transistors.
- Module 5V bus power supplied by PLC backplane; 24V power for output circuit must be external.
- Detecção de falhas (Bench Test)
- Ligar: Check module bus LED and channel LED status.
- Activate each point sequentially: 24V measured at terminal when ON; voltage drops at OFF state.
- Short-circuit test: Short output to 0V, module triggers protection, output restores automatically after short removed.
- Measure off-state leakage current to evaluate transistor aging.
- HS Code Reference
8537101100 (PLC discrete I/O expansion module)
- Alternatives within TM3 family
TM3DQ8TG: Same specs, spring cage terminal
TM3DQ8U: 8-point NPN Sink output, opposite logic, do not select by mistake
