Field Equipment
(4-20 mA loops)

The Surge Control line of field equipment protectors are ideally suited for harsh environments. They are designed to protect equipment from the destructive effects of lightning strikes, electrical disturbances, surges and spikes. In addition, EMI/RFI filtering will reduce damaging electrical noise from reaching sensitive equipment. These models are multi-stage, hybrid devices that feature both common and differential mode suppression.

Features:
  • Effective EMI/RFI Filtering
  • Designs exceed UL, CSA, IEC, ANSI/IEEE and FM recommendations
  • Various operating voltages
  • Sub nanosecond response time
  • Automatic reset, requires no maintenance

Click On The Links Below For Product Data Sheet

SPN-42 Series - Stainless steel, 1/2" conduit mount suppressor for RS-232, RS-422, RS-485 applications. SPN-42F (2 wire dual-ended) & SPN-42FS (2 wire single-ended). Meets Class I, Groups C, D; Class II, Groups E, F & G; Class III, Division 1. External grounding option available.
Uses: AC/DC Power, Signal, Data

   

SPN-43 Series - Stainless steel, 1/2" conduit mount suppressor for RS-232, RS-422, RS-485 applications. SPN-43F (3 wire dual-ended) & SPN-43FS (3 wire single-ended). Meets Class I, Groups C, D; Class II, Groups E, F & G; Class III, Division 1. External grounding option available.
Uses: AC/DC Power, Signal, Data

   

SPT-420 Series - Explosion proof series meets class 1, Groups C, D; Class II, Groups E, F and G; Class III, Division 1 environments. SPT-420 is a current loop suppressor. Multi-stage, designed for the most harsh industrial environments.
Uses: AC Power, Signal, Data

   
SPT-42U Series - Smallest multi-stage suppressor in the market. Protects a data line pair or 1 current loop. Mounts inside most field transmitters and is commonly used on the receiver end as well. Automatic reset, heavy industrial grade, hermetically sealed. Select the SPT-43U Series for three-wire transmitters.
   
SPR-42US Series - 2 wire analog/digital or current loop suppressor. Stud ground mounted, compact yet multi-stage for measurement and control installations as well as RS-422, RS-485, and RS-232 applications. Maintenance free, heavy duty industrial grade, hermetically sealed.
Uses: Telephone, Telecom, Signal, Data
   
SPT-10R Series - Various Models - Specifically designed for the Rosemount transmitters standardized terminal head (P/N 03031-03320003). Mounts on existing terminal block inside the Rosemount transmitter.
Uses: Signal
   

SPT-XXR Series - Standardized Terminal Head -Mounts inside Rosemount transmitters on existing terminal strip. These models are accepted by several transmitter manufacturers. Select a model for any offering of Rosemount transmitters or transducers. Conformally coated PCB and uses stainless steel hardware.
Uses: Signal