DEIF SCM4.2 Generator Control‑Measuring Module

Technical Specifications

Model:SCM4.2

Brand:DEIF

System compatibility:8TE plug‑in generator control & measuring module for DEIF DM‑4 DGU rack, communicates via back‑plane DM‑LAN bus with PCM4.3 main controller. SCM4.2 only has generator side measuring circuit, without busbar voltage input and independent hardware synchrocheck / advance closing function. Used for marine, offshore and hydro genset control.

Function:Integrated generator measuring and regulating module. Direct generator three‑phase voltage input up to 690V AC; CT secondary current input 1A /5A. Measures voltage,current,frequency,power factor and power values,accuracy class 0.5(40~70Hz). Provides dedicated PWM analogue outputs for engine governor speed and AVR voltage adjustment. Equipped with relay outputs for generator breaker control and breaker status feedback monitoring. Rotary switch sets unique module address;hardware jumpers configure function options.

Installation:Plug‑in slot mounting inside DM‑4 DGU rack,8TE width back‑plane connection,screw terminal block for PT/CT and field control wiring,rotary address switch and hardware jumpers on front panel.

Interface:

‑Back‑plane DM‑LAN internal bus

‑Generator three‑phase voltage terminals(max 690V AC direct)

‑Generator three‑phase CT current terminals(1A /5A secondary)

‑PWM analogue output terminals for governor & AVR drive

‑Potential‑free relay output terminals for breaker control

‑Breaker feedback signal input terminals

‑Rotary address‑setting switch and hardware configuration jumpers

‑Front‑panel LED status indicators

Circuit feature:2.5kV galvanic isolation for measuring circuits;surge suppression for high‑voltage measuring terminals;non‑volatile memory stores module configuration;hardware watchdog supervision;max burden per voltage phase 0.5VA,max burden per CT phase 0.4VA.

Feature:Marine classification society approved,hot‑swap capable. One DGU rack supports up to four SCM modules,each module must use unique address. Distinguished from SCM4.1:no busbar measuring circuit,without independent hardware synchrocheck and advance closing logic.

Diagnostic:Front‑panel LED indicates module power and DM‑LAN bus communication status;measuring data and channel fault information transmitted to PCM main controller via back‑plane bus.

Power supply:Logic power supplied by rack back‑plane from PCM module,typical power consumption 5W

Protection class:IP20 when installed inside DGU rack

Horizontal operating temperature:‑25℃ ~ +70℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Shock & vibration:Complies with DNV marine environmental requirement

Weight:0.52kg

Dimensions:40.5mm ×234mm ×160mm

Certification:DNV,ABS,LR,CE,marine type approval

Built‑in function:SCM4.2 generator control‑measuring module performs generator electrical sampling and outputs PWM regulating signals for governor and AVR for DEIF DM‑4 power management system. It monitors generator operating parameters and executes speed/voltage adjustment,controls generator breaker. Widely used for ship,offshore and hydro generator automation cabinet spare‑part replacement.

Product Brief

SCM4.2 belongs to DEIF DM‑4 series power control system spare‑part family,rack‑mount generator control measuring module. It is used for single generator measurement and regulation,select SCM4.1 if busbar measurement and synchronisation advance closing function are required. Rotary address switch and hardware jumpers must be correctly configured before commissioning. Widely applied for marine and hydro power equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.