TECHNICAL BULLETIN 5000 I/P-TB 05-08 MODEL STD 5131 and 5141 BRANDT I/P TRANSDUCER The Brandt Series STD 5000 is a current-to- pneumatic (I/P) transducer for use in intrinsically safe installations. Using a "Patented Solid State" design, the STD 5000 converts an electronic signal into a proportional pneumatic signal. With its internal feedback network, the STD 5000 responds quickly to step input changes. FEATURES • Vibration resistant. • Low air consumption. • Mount in any position. • Intrinsically safe capability. • Balanced supply & exhaust dynamics. SPECIFICATIONS approved and properly rated safety barriers (not provided). Input Signal: 4-20 mA. Classification Output Pressure: STD 5131- 3-15 psig (.21-1.03 barg). (continued): STD 5141- 1-17 psig (.07-1.17 barg). Approvals: 4-20 mA input ONLY. Class I, II and III, Div. 1, Applicable Groups A, Accuracy: + 0.15% of span. B, C, D, E, F and G. Class I, Div. 2, Groups A, B, C and D, non-incendive. Repeatability: + 0.05% of span. Class II, Div. 2, Groups F and G. Class III, Div. 2. Deadband: + 0.02% of span. Canada-Canadian Stds. Assoc.-CSA Vibration Effect: < 0.25% from 1-200 Hz/1g. Enclosure: Enc 4. Explosion Protection: Intrinsically safe, Loop Load: 3.8 Vdc +5 ohms (195 ohm load at when installed with CSA approved and 20 mA). properly rated safety barriers (not provided). Supply Pressure: STD 5131; 20 psig (1.4 Barg). Approvals: Class I, Groups A, B, C and STD 5141; 35 psig (2.4 Barg). D, Temp Code T3. Class II, Groups E, F and G. Electrical USA-Factory Mutual - FM 3 Output Capacity: 4.0 SCFM (7 SM /Hr supply and Classification: Enclosure: NEMA 4X, Hazardous exhaust characteristics are balanced Outdoors Locations, weatherproof. to within + 10%. Explosion Protection: Intrinsically Electrical safe, when installed with FM 3 (continued): Barg) for 3-15 psig output, to 0.5- Air Consumption: 0.04 SCFM (0.07 SM /Hr) Steady 1 psig (.003-.07 Barg) for 1-17 State Average, 0.06 SCFM 3 psig output regardless of direct or (0.10 SM /Hr) Maximum. reverse mode selection. Operating -20°to+150°F (-29°to+66°C). Connections: Pneumatic-1/4" NPT, Supply and Temperature: Output. Electrical- 1/2" conduit connection. Temperature < 1% per 100°F (55°C) change. Effect: Materials: Enclosure cap and body- aluminum. Failure Mode: Transducer always fails to the di- rect mode, i.e. if input current Painting: Chromate primer, powder coat drops below 3.7 mA dc, the out- epoxy final finish. Failure Mode put will drop to 1-2 psig (.07-.14 TYPICAL PIPING SCHEMATICS FOR CONTROL VALVE WITH I/P TRANSDUCER PY=I/P transducer- Model 5131 1-17 psig PY=I/P transducer- Model 5141 I/P DIRECT TO VALVE POSITIONER I/P DIRECT TO SOLENOID VALVE PY=I/P transducer- Model 5141 Rotary valve tight shutoff could be compromised with this ar- rangement. Because of pressure from the transducer, the control valve's actuator pressure is not able to be fully unloaded. Con- sider using a valve positioner or a solenoid valve if tight shutoff is required. Reference IPTDP-TB technical bulletin for maximum pressure drop capability of the control valve installed in conjunction with the I/P transducer. A portion of the mA "SIG" will be lost as the control valve's bench set range is overcome. I/P DIRECT TO ACTUATOR NOTE: Use "99" Product Coder to specify Cashco, Inc. P.O. Box 6 model and mounting. Ellsworth, KS 67439-0006 PH (785) 472-4461 FAX (785) 472-3539 E-mail: sales@cashco.com exportsales@cashco.com Printed in U.S.A. Model 5131/5141