Product Core Brief
- Model: 1SVR011718R2500 (CC-E I/I)
- Brand: ABB
- Series: CC-E / CAIS fixed-range analog signal isolation converters
- Core Function: Break ground loops by galvanically isolating 4–20mA field transmitters from DCS/PLC analog input racks
- Product Type: Compact DIN rail single-channel fixed current signal isolator
- Key Specs: Fixed 4–20mA input / 4–20mA output | 3-way input/supply/output isolation | 2500 VAC dielectric withstand ⚠️ EOL — limited stock remaining, Condition: New Surplus
Product Introduction
ABB 1SVR011718R2500 is a plug-and-play fixed current isolator built exclusively for standard 4–20mA process transmitter loops, with zero configuration required for field commissioning.This unit differs from multi-range 1SVR011700R0000 hardware by omitting DIP switches and trim pots; its hardwired current mapping cuts setup labor time, while the 2500 VAC isolation barrier suppresses mains-coupled noise common on long tank and pipeline sensor cables.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Channel configuration | Single fixed analog channel |
| Hardwired signal mapping | 4–20 mA input = 4–20 mA linear output, no scaling adjustments |
| Isolation topology | 3-way galvanic separation: Field Input / 24 V Supply / Control Output |
| Dielectric isolation rating | 2500 VAC one-minute hipot test |
| Operating supply voltage | 24 V DC ± 10 %, 42 mA typical steady-state draw |
| Status indicator | Single front-panel green LED for active 24 V supply confirmation |
| EMC compliance | IEC 61000-6-2 industrial noise immunity standard |
| Mechanical mounting | TS35 standard horizontal DIN rail clip-on installation |
| Housing physical dimensions | W22.5 mm × H75 mm × D107 mm |
| Net unit mass | 0.086 kg |
| Operating ambient range | -20 °C to +60 °C full rated linearity; derated performance up to +80 °C |
| Storage temperature range | -40 °C to +70 °C, non-condensing 5–95 % RH |
| Certifications | CE, RoHS, UL recognized for industrial control cabinet use |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against ABB CC-E spare parts databases; inspect terminal screw spring tension, front LED brightness, unbroken housing latches, and PCB conformal coating integrity. Validate intact OEM anti-static packaging seals to filter counterfeit surplus stock.
- Live Functional Test: Mount the unit to a DIN rail test bench paired with a calibrated 4–20mA signal source and precision 250 Ω load resistor; run continuous 24-hour cyclic full-scale current ramping without human adjustment. Log stable 24 V supply and isolator temperature with a Fluke 115 multimeter through the full test cycle.
- Electrical Parameter Test: Use a 500 V Megger to measure isolation resistance across all three isolated domains; pass threshold set above 10 MΩ. Inject 120 V differential ground-loop voltage to confirm zero output current offset drift across the full measurement span.
- Firmware Verification: No programmable firmware or configurable jumpers on the unit; photograph terminal block pin labeling for 4–20mA input/output wiring for commissioning reference.
- Final QC & Packaging: Wipe PCB surfaces with anti-static cloth; place the unit in foam-lined static shielding bag, attach a QC Passed label printed with inspection date before sealing in original factory carton.
Replacement Pitfall Guide
❗Firmware Mismatch Risk: Not applicable; the unit contains no programmable logic. Mismatch risks stem from misapplying it to voltage or RTD sensor loops instead of 4–20mA transmitters.❗DIP Switch / Jumper Misconfiguration Risk: The hardware has no DIP switches or calibration jumpers. Field technicians attempting to force voltage signal inputs will clip all output current values. Mitigation: Only deploy this unit for pure two-wire 4–20mA pressure, level, or flow transmitters; reserve multi-range models for mixed signal cabinets.❗Terminal / Cable Incompatibility Risk: Unshielded twisted-pair field cables lack EMC drain wire grounding matched to the isolator’s differential front-end. Long unshielded trunk runs introduce 50 Hz mains hum and fluctuating DCS readings. Mitigation: Install fully shielded transmitter cable with single-point shield termination at the control cabinet ground bar only.❗Power Supply Mismatch Risk: A low-wattage 1 A auxiliary supply cannot feed a DIN rail populated with six or more of these isolators plus analog I/O modules. Combined steady-state draw exceeds the supply continuous rating. Mitigation: Size cabinet power supplies with 20 % current headroom above total combined isolator and I/O load.❗ESD Damage Risk: Dry winter control room air generates static discharge to exposed terminal PCB traces. Field records show ungrounded handling burns input current sense op-amps, full tank measurement skid downtime labor costs exceed $950. Mitigation: Place an anti-static mat under the DIN rail assembly and hold bare cabinet ground metal for three full seconds before sliding the unit onto the rail.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- 1SVR011718R2500 → 1SVR011700R0000 Multi-Range Isolator : Needs Adaptation — multi-range unit supports voltage/RTD inputs, this fixed-current unit cannot be repurposed for non-4–20mA sensor wiring without signal conditioning add-ons
- 1SVR011718R2500 + S800 AI810 Analog Input Modules : Direct — native 4–20mA channel support matches the isolator’s fixed output signal range
- 1SVR011718R2500 + AC31 07AI91 Multi-Type Analog Input Module : Direct — compatible with the PLC’s current input channel mapping
- 1SVR011718R2500 + Freelance 2000 DAI04 Temperature Input Boards : Partial compatibility — only usable alongside separate RTD signal converters, cannot replace thermal conditioning hardware
- 1SVR011718R2500 + ACS Series Variable Frequency Drives : Incompatible — drive analog reference circuits use unisolated low-level signals that do not require 3-way galvanic separation
