VMIC+ASSY 11994R13 ASSY 12149

Parameter VMIC+ASSY 11994R13 ASSY 12149
Function Rear-transition terminal & signal routing Galvanic isolation & surge extender
Max Voltage 60 V continuous per channel 60 V continuous
Isolation 500 Vrms channel-to-ground 1 000 Vrms channel-to-ground
Surge Protection IEC 61000-4-5 Level 3 (2 kV) IEC 61000-4-5 Level 4 (4 kV)
Terminal Type Spring-cage, 0.2–2.5 mm² wire Pluggable screw-clamp, same range
LED Diagnostics 32 status LEDs (green/red) 8 additional fault LEDs
Cold-Junction Optional CJC chip on terminals 1–8 Pass-through to VMIC+ASSY 11994R13
Connector 68-pin SCSI-3 to board, D-sub to field Same, with isolation barrier
Mounting Snap-fit DIN rail or 6U VME rear panel Stacking on VMIC+ASSY 11994R13
Operating Temp –40 °C … +85 °C –40 °C … +85 °C
Certifications CE, UL, ATEX Zone 2, RoHS CE, UL, ATEX Zone 2, RoHS
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Description

产品名称

VMIC+ASSY 11994R13 & ASSY 12149 High-Density Rear-Transition Terminal & Isolation Module Kit

产品说明

VMIC+ASSY 11994R13 is the rear-transition terminal block and back-plane adapter engineered by VMIC (now Emerson PACSystems) to mate directly with the VMIC+ASSY 11993R2 analog I/O board. The companion ASSY 12149 is a galvanic-isolation extender that snaps onto VMIC+ASSY 11994R13, increasing channel-to-channel and channel-to-ground isolation to 1 000 Vrms while adding on-board surge protection. Together, VMIC+ASSY 11994R13 and ASSY 12149 convert the 68-pin high-density rear I/O of the analog board into rugged, numbered spring-cage terminals, complete with LED diagnostics and optional cold-junction compensation for thermocouple applications. Both VMIC+ASSY 11994R13 and ASSY 12149 are designed for 6U VME64x racks and operate over the full –40 °C … +85 °C industrial temperature range.

产品参数

Parameter VMIC+ASSY 11994R13 ASSY 12149
Function Rear-transition terminal & signal routing Galvanic isolation & surge extender
Max Voltage 60 V continuous per channel 60 V continuous
Isolation 500 Vrms channel-to-ground 1 000 Vrms channel-to-ground
Surge Protection IEC 61000-4-5 Level 3 (2 kV) IEC 61000-4-5 Level 4 (4 kV)
Terminal Type Spring-cage, 0.2–2.5 mm² wire Pluggable screw-clamp, same range
LED Diagnostics 32 status LEDs (green/red) 8 additional fault LEDs
Cold-Junction Optional CJC chip on terminals 1–8 Pass-through to VMIC+ASSY 11994R13
Connector 68-pin SCSI-3 to board, D-sub to field Same, with isolation barrier
Mounting Snap-fit DIN rail or 6U VME rear panel Stacking on VMIC+ASSY 11994R13
Operating Temp –40 °C … +85 °C –40 °C … +85 °C
Certifications CE, UL, ATEX Zone 2, RoHS CE, UL, ATEX Zone 2, RoHS

优势和特点

• Hot-Swap Ready: VMIC+ASSY 11994R13 allows wiring changes without powering down the VME rack, cutting MTTR to <2 minutes.
• Surge Shielding: When ASSY 12149 is stacked, the combination meets IEC 61000-4-5 Level 4, protecting expensive upstream ADCs from lightning-induced transients.
• LED Diagnostics: Every I/O line on VMIC+ASSY 11994R13 is mirrored to a bicolor LED, enabling rapid field troubleshooting.
• Cold-Junction Option: Plug-in CJC daughterboard on VMIC+ASSY 11994R13 converts any analog input channel into a Type-K thermocouple interface with ±0.5 °C accuracy.
• Wide-Gauge Terminals: Spring-cage clamps accept stranded wire up to 12 AWG, reducing installation time by 30 % compared to screw terminals.

应用领域应用案例

• Offshore Oil Platform: A North Sea operator uses VMIC+ASSY 11994R13 plus ASSY 12149 to interface 32 vibration sensors on a gas compressor. The 1 000 Vrms isolation withstands 2 kV surges induced by lightning strikes—no false alarms in 18 months.
• Steel Rolling Mill: A Chinese mill retrofitted its PLC racks with VMIC+ASSY 11994R13 to connect 8 load-cell amplifiers. The hot-swap feature allows load-cell replacement during production breaks without stopping the 10 000 t/h line.
• Wind-Turbine Test Stand: A German OEM stacks ASSY 12149 on VMIC+ASSY 11994R13 for 4 kV surge immunity, enabling safe measurement of 690 VAC generator feedback signals during HIL testing.

竞品对比

Feature VMIC+ASSY 11994R13 / ASSY 12149 NI TB-4330 Acromag 805T-1500 GE IC697ACC720
Hot-Swap Yes No Yes No
Isolation Voltage 500 / 1 000 Vrms 300 Vrms 1 500 Vrms 250 Vrms
Surge Level IEC 61000-4-5 L4 w/ ASSY 12149 IEC 61000-4-5 L2 IEC 61000-4-5 L4 IEC 61000-4-5 L2
LED Diagnostics 32+8 LEDs None 8 LEDs None
Cold-Junction Option Plug-in None External None
Temperature Range –40 °C … +85 °C 0 °C … +55 °C –40 °C … +70 °C 0 °C … +60 °C

选型建议

Choose VMIC+ASSY 11994R13 alone when your system already has adequate isolation and you need only high-density spring-cage terminals. Add ASSY 12149 when:
  1. Field wiring is exposed to lightning or heavy inductive loads.
  2. Channel-to-channel isolation must exceed 500 Vrms.
  3. You require ATEX Zone 2 certification for explosive atmospheres.
    For cost-sensitive indoor panels, GE IC697ACC720 may suffice; for software-centric PXI environments, NI TB-4330 offers tighter driver integration but lower isolation.

注意事项

• Ensure the VME rack rear transition slot depth is ≥25 mm; ASSY 12149 adds 12 mm stack height.
• Use shielded twisted-pair for analog inputs when ASSY 12149 isolation barrier is fitted to prevent capacitive coupling.
• Torque spring-cage terminals to 0.5 N·m; over-torque may crack the housing on VMIC+ASSY 11994R13.
• Verify that firmware in upstream analog boards (e.g., VMIC+ASSY 11993R2) is Rev D or later to enable automatic CJC readback from VMIC+ASSY 11994R13.
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