Bulletin 62.3:4200 June 1997 4200 Series Electronic Position Transmitters The 4200 Series electronic position transmitters com- bine Fisher’s field-proven electronic and mechanical expertise in a versatile, accurate instrument that senses the position of a device, and sends a standard (4 to 20 milliampere) output signal to an indicating de- vice. The instrument is available as a transmitter with integral high and low electronic travel limit alarms, as a transmitter only, or with electronic travel limit alarms only. The instrument can sense the position of rotary or slid- ing stem valves, vents, dampers or other devices. When the instrument is mounted, a potentiometer shaft is mechanically connected to the device to sense mechanical motion. For a standard instrument, a W4966/IL single potentiometer is provided for position input, or an optional dual element potentiometer is available to Figure 1. 4200 Series Transmitter allow independent electrical operation of the transmit- ter and alarm circuits. The instrument has standard, or long stroke (see fig- ure 5), capabilities for sliding stem actuator applica- tions. For long stroke applications, a multiturn poten- tiometer attached to a cable/pulley assembly is used to sense linear motion of the actuator stem or other devices. The instrument with standard capabilities can also be used on quarter-turn actuators. For instruments equipped with electronic travel limit alarms, individual electronic high and low alarm cir- cuits drive separate high and low alarm SPDT relays. The user adjusts the trip point and deadband of the high and low alarms to the desired travel limits. When the sense potentiometer voltage is higher than the high trip point, the electronic high alarm circuit de-en- ergizes the high alarm relay. When the sense poten- tiometer voltage is lower than the low trip point, the low alarm circuit de-energizes the low alarm relay. The low trip point may be offset from the high trip point by as little as 5% of the remaining span. In the event of a W4271–1/IL power loss to the alarm circuits, both alarms are tripped (both relays are de-energized). This indicates a Figure 2. 4200 Series Transmitter on a Control Valve (Continued page 3) D200357X012 Bulletin 62.3:4200 Specifications Available Configurations inches (483 mm) from the instrument]. The instru- ment is tested with the caps on. Type 4211 and See table 1 4221 comply with European EMC directive. (1) Input Signal Source Travel Limit Alarm Relays
Standard single potentiometer, or optional
dual Type: Two single-pole, double-throw relays potentiometer is the source for the transmitter and Contacts: 1 Form C, silver-nickel alloy with gold travel limit alarm circuit inputs. Refer to table 2 for overlay zero and span limits. Service Rating: The relay rating is 5 amperes at either 30 volts dc or 120 volts ac (resistive load). (1) Transmitter Output Signal Life Expectancy: 100,000 operations at rated load, (1) Range : 4 to 20 milliampere dc transmitter output or 50,000 operations at a typical in-rush current of (1) Load Impedance : See figure 3 10 amperes with a 120 volt ac lamp or motor load Output Current Limit: 30 mAdc maximum (1) Operating Conditions Travel Limit Alarms Transportati Normal and Number of Possible Alarms: Two or none. Each on and Normal Condition Operative Storage Reference SPDT relay indicates limit and fault conditions as Limits Limits follows: Ambient –50 to 160F –60 to 180F 77F Operating Relay Coil NC Contact NO Contact Temperature (–46 to 70C) (–50 to 80C) (25C) Condition State State State Ambient Travel within Relative 10 to 95% 10 to 95% 40% energized open closed limits Humidity Travel beyond de-energized closed open limits Construction Materials Power loss de-energized closed open Transmitter Housing and Covers: Aluminum NC—Normally closed. Contacts are closed when relay is de-energized NO—Normally open. Contacts are open when relay is de-energized. Alloy O-Rings: Nitrile Power Supply Requirements Mounting Hardware: Steel Pipe Plug: Nickel coated steel See table 3 Cable: Nylon-coated stainless steel (long stroke only) Recommended Power Supply Pulley: Delrin plastic (long stroke only) +24 volts dc nominal Mounting Reference Accuracy The instrument can mount on the actuator of sliding ±1% of output span. Includes combined effects of stem or rotary valves (refer to figure 5), or it can be hysteresis, linearity, and deadband used for other applications (1) Repeatability : ±0.25% of span Electrical Classification (1) Operating Influences Refer to the hazardous area classification bulletins (1) Ambient Temperature : For a 100F (56C) for specific approvals change in normal operating conditions, maximum zero shift is ±0.5%, and the maximum span shift is Housing Classification ±0.75% of span Refer to the hazardous area classification bulletins Power Supply: Output signal changes less than ±0.1% when operating terminal voltage varies be- Approximate Weight tween 11 and 30 volts dc Transmitter Without Mounting Bracket: 4 pounds (1) Electromagnetic Interference (EMI) : When (1.8 kg) tested per SAMA Standard PMC 33.1-1978, change is less than ±0.5% of span in an electromagnetic Options field classified as 3-abc with a field strength of 30 V/m [this is approximately equivalent to a 5 watt, 20 Long Stroke Applications:
Small, or
large to 1000 megahertz radio transmitter operating 19 pulley 1. These terms are defined in ISA Standard S51.1-1979. 2 Bulletin 62.3:4200 Table 1. Available Configurations TRAVEL TRAVEL LIMIT DUAL Standard Stroke Long Stroke TYPE NUMBER TRANSMITTER (1) (1) ALARMS POTENTIOMETER Up to 4-1/8 Inches Up to 24 Inches (Up to 105 mm) (Up to 610 mm) 4210 X X X – – – – – – 4211 X – – – X – – – – – – 4212 – – – X X – – – – – – 4215 X X X – – – X 4220 X X – – – X – – – 4221 X – – – – – – X – – – 4222 – – – X – – – X – – – 1. See table 2 for zero and span limits. (2) Table 2. Zero and Span Limits DEGREES OF INCHES mm POTENTIOMETER ROTATION TYPE TYPE LINKAGE LINKAGE (1) NUMBER Span CONNECTION Span Span Zero Zero Zero Zero Zero Zero Min. Max. Min. Max. Min. Max. Position Position Position 4210 1 0 to 2 1/3 2 0 to 51 8 51 421 4211 1 0t 0 to 90 o 90 15 15 90 90 4212 2 0 to 4-1/8 2/3 4-1/8 0 to 105 17 105 4215 4220 Small Pulley 0 to 12 4-1/8 12 0 to 305 105 305 4221 4221 0t 0 to 884 o884 150 150 884 884 Large Pulley 0 to 24 12 24 0 to 610 305 610 4222 1. Refer to figure 5 for location of connections and pulleys. 2. Zero position is the range of values over which the transmitter zero can be adjusted. Span is the range of shaft rotation or stem travel the transmitter span can be adjusted. For example, a zero position of 45 degrees and a span of 15 degrees means the transmitter output is 4 mAdc after 45 degrees of shaft rotation. The output then increases from 4 mAdc to 20mAdc as the shaft rotates from 45 to 60 degrees. system failure because the actuator cannot be physi- � Adjustable Deadband—Electronic travel limit cally at both travel limits simultaneously. The relay alarms have an adjustable deadband up to 10 percent contacts are isolated from the transmitter and alarm of the maximum span. circuits. � Compact Design—The instrument, even with To reduce field wiring requirements from 4 to 3 wires, travel limit alarms, uses little space when mounted, the transmitter and alarm circuits share the positive allowing room for additional devices. supply wire. A separate return wire is required to iso- late relay coil currents from the 4 to 20 mA transmitter signal. � Durable Construction—A rugged housing and a corrosion-resistant coating on the printed wiring board help protect the instrument from harsh environments. Features � Simple Circuitry—A simple hybrid electronic � High Accuracy—A precision film-element poten- design combines the best qualities of discrete compo- tiometer in the standard unit and a precision multiturn- nents and integrated circuits for improved reliability wirewound potentiometer in the long-stroke unit pro- and performance. vide exceptional linearity by matching the span of the sense element to the application. � Easy Maintenance—The simple design of the � Application Versatility—This instrument may transmitter and alarms allows easy maintenance. The be used with sliding-stem or rotary valves as well as high reliability of the instrument requires minimum with other mechanical devices such as furnace damp- spare parts inventory. ers or louvers. � Moisture Resistant—The field wiring compart- � Electronic Travel Limit Alarms—To eliminate ment is isolated from the electronic compartment. This the need for externally mounted mechanical limit protects the electronic circuits from any moisture switches, instruments with travel limit alarms incorpo- brought into the housing via the field wiring ports. rate comparator circuits that monitor the sense poten- tiometer voltage output. (Features Continued page 4) 3 Bulletin 62.3:4200 Table 3. Power Supply Requirements and Wiring Connections Transmitter Field Wiring 1000 Terminal Connections Current Voltage (Vdc) Req Required ired Relay (mA) Supply Signal Min Max Return (1) (2) Wire Wire (3) 750 Wire Transmitter 650 11 30 20 max. X X – – – Only Transmitter 500 OPERATING REGION with 20 30 80 max. X X X Travel Limit Alarms 250 Travel Limit Alarms 20 30 50 max. X – – – X without Transmitter 0 X indicates this connection required. 0 10 20 30 1. Supply wire provides power supply positive connection for electronic circuits and 24 MAXIMUM TRANSMITTER 11 relay coils (in instruments with travel limit alarms). TERMINAL VOLTAGE 2. Signal wire provides connection for device receiving 4 to 20 mA transmitter signal. NOMINAL SUPPLY 3. Relay return wire provides separate return wire for relay coil currents. VOLTAGE MINIMUM TRANSMITTER TERMINAL VOLTAGE A6765/IL POWER SUPPLY VOLTAGE (VOLTS dc) Features (Continued) Figure 3. Transmitter Load Limitations � Field Reversible Action—The output is easily reversed in the field simply by switching two poten- tiometer leads on the printed wiring board. � Zero—Between 0 and 90 degrees of shaft rota- tion. � Electromagnetic Interference (EMI) Fil- � Span—Between 15 and 90 degrees of shaft rota- ters—Filters between the electronic compartment and tion. the field wiring compartment of the housing help pro- vide protection against electromagnetic interference. Other Devices—The transmitter is mounted such that the potentiometer shaft or linkage aligns with the mo- Applications tion of the device. The motion of the device should not exceed the zero and span input signal limits in de- Standard Position Transmitter grees of rotation. Sliding-Stem Valve—In typical valve applications, the transmitter is mounted on the actuator as shown in Long-Stroke Position Transmitter figure 1. Two linkage configurations sense up to 2 inches (51 mm) or up to 4-1/8 inches (105 mm) of Long-Stroke Sliding-Stem Valve—The transmitter is stem travel. The linkages incorporate mechanical mounted on the actuator as shown in figure 5. The gearing to linearize the transformation from linear mo- cable/pulley assembly can sense from a 4-1/8 inch tion to rotational. To reduce the possibility of physical (105 mm) minimum to a 24-inch (610 mm) maximum damage if the linkage should slip, the potentiometer stem travel. The sensing element is a multiturn poten- has no physical stops. Zero and span can be adjusted tiometer with physical stops. Two pulley sizes are as follows: used for long stroke applications. � Zero—Between 0 and 2 inches (51 mm) of travel, � Zero—Between 0 and 12 inches (305 mm) for or between 0 and 4-1/8 inches (105 mm) of travel. the small pulley. Between 0 and 24 inches (610 mm) � Span—Between 1/3 inch (9 mm) minimum span for the large pulley. and 2 inches (51 mm) maximum span, or between 2/3 � Span—Between 4-1/8 inches (105 mm) minimum inch (17 mm) minimum span and 4-1/8 inches (105 and 12 inches (305 mm) maximum for the small mm) maximum span. pulley. Between 12 inches (305 mm) minimum and 24 Rotary-Shaft Valve—In typical valve applications, the inches (610 mm) maximum for the large pulley. transmitter is mounted on the actuator as shown in figure 2. A coupling connects the hub of the actuator Other Devices—The transmitter is mounted such that to the potentiometer shaft. To reduce the possibility of the cable/pulley assembly aligns with the motion of the physical damage if the coupling should slip, the poten- device to allow straight retraction of the cable to the tiometer has no physical stops. Zero and span can be pulley. The motion of the device should not exceed the adjusted as follows: zero and span limits in inches (mm). 4 LOAD IMPEDANCE (OHMS) Bulletin 62.3:4200 PRINTED RELAY FIELD PRINTED WIRING NUMBER 1 WIRING BOARD BOARD TERMINAL TERMINAL BLOCK BLOCK NUMBER 1 NUMBER 3 TERMINAL TERMINAL BLOCK BLOCK RELAY NUBMER 1 NUMBER 2 NUMBER 2 W4276–2/IL W4675–1/IL ����������� ����������� ����� ������ ����������� Figure 4. Type 4210 Transmitter Details Installation Ordering Information Field wiring is inserted into one of the ports and con- When ordering, specify: nected to the terminal blocks mounted on the printed wiring board in the field wiring compartment. The in- 1. Transmitter type number. strument with transmitter circuits and travel limit alarms, and the instrument with alarms only (no trans- mitter circuits), use terminal blocks numbered 1, 2, 2. Actuator type, size, and length of stroke. and 3 (see figure 4) on the printed wiring board. These (Note: For 490 Series actuators, specify yoke boss terminal blocks are accessible when the field wiring and cylinder size.) compartment cover is removed. The instrument with transmitter circuits only (no alarms) uses a barrier strip 3. Valve body design. mounted in the field wiring compartment without the printed wiring board. Dimensions of the transmitter (1) housing are shown in figure 5. 4. Other applications . 1. Contact your Fisher Controls sales office or sales representative for assistance in deter- mining the type and style of linkage and mounting hardware required for the application. 5 Bulletin 62.3:4200 PORT TRANSMITTER 1/2-INCH NPT FIELD WIRING COMPART- (2 PLACES) COMPARTMENT MENT 4.00 6.25 2.00 (102 (159) (51) ) 5/16-18UNC 0.53 DEEP (13) 2.00 4.00 (51) (102) CAP (2 PLACES) 1.38 ���������� (35) 0.25 (6) DIA. 3.00 (75) POTENTIOMETER 2.62 2.62 0.81 SHAFT (67) (67) (21) ALLOW 10 INCHES (254) FOR MAINTENANCE (2 PLACES) INCH ������� 19A7968–E �������� (mm) B1910–3*A / IL Figure 5. Dimensions 6 Bulletin 62.3:4200 19A7968–E B1910–3*B / IL Figure 5. Dimensions (Continued) 7 Bulletin 62.3:4200 Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. �Fisher Controls International, Inc. 1985, 1997; All Rights Reserved ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ �������������������� ���������� ����������������������������������������� ����������������� �������� �� ����������������� ���������������� �� ������������ ����� ���� �������������� For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 0512 8 Printed in U.S.A.