SERIES EHG Many applications requiring a fixed temperature set point have relied on mechanical thermostat devices (thermostats) for thermal control. But, thermostats are inadequate for many applications because of the long-term reliability issues such as 100,000 cycle rating and poor temperature control. Watlow developed the SERIES EHG temperature control for evolving application requirements. This new thermal solution includes a compact temperature control, thermocouple sensor and power switching device that are integrated into the heater s power cord. The SERIES EHG reduces system costs and substantially extends the life over conventional thermostat solutions. Features and Benefits Long operation life Improves system reliability Tight temperature control Assures process accuracy Small sensor footprint Fits with almost any heater Responds quickly to temperature changes Controls high watt densities in low mass applications UL recognized Compliant with agency regulations Reduced system cost A single EHG control can be configured with multiple heaters to reduce system cost Pre-wired, in line control Simplifies installation Two-wire power connection Durable housing with built-in strain relief Protects electronics Low risk of mechanical damage Manufactured with proven Watlow components Assures reliable system performance Applications Aerospace composite repair Foodservice equipment Freeze protection Life science Semiconductor Telecommunications Specifications Operational SERIES EHG can be added to most flexible heater configurations Factory programmed fixed set point On-off control with C (6 F) switching hysteresis Temperature band LED indicator ON between 20 and +20 C (-68 and +68 F) of set point Electrical Voltage rating: 120 or 240VÅ(ac) 0/+10 percent, 50/60Hz SERIES EHG system UL recognized to 10 amps maximum Sensor Type K thermocouple Mechanical Control dimensions 95.25 mm (.75 in.) long by 44.45 mm (1.75 in.) diameter Heater per silicone rubber heater specifications Agencies SERIES EHG control: TUV File DE -068 to EN 61010-1:2001, UL File E4684 to UL 87 temperature indicating and regulating equipment Environmental Control operating temperature range 0 to 70 C (2 to 128 F) Control storage temperature range 40 to 70 C (-40 to 158 F) Contact factory for custom configurations. UL and C-UL are registered trademarks of Underwriter s Laboratories, Inc. 9
SERIES EHG Integrated SERIES EHG System Versus Integrated Thermostat System Integrated EHG System Integrated Thermostat System SERIES EHG Benefit Life comparison at Tested to greater than Rated 100,000 cycles Longer product life of rated amperage 4,000,000 cycles with SERIES EHG system and 10 amp load high reliability in application Switch hysteresis C (6 F) 8 C (15 F) SERIES EHG system will provide superior process control Improved response time C (6 F) typical 14 C (25 F) typical SERIES EHG system will respond reduces overshoot on changes in temperature faster start-up than thermostat Warranty 2 years on material 1 year on material Warranty can be extended because and workmanship and workmanship of superior SERIES EHG life Zero Cross Switching SERIES EHG has Random switching during Reduces possibility of electrical zero cross switching sign wave cycle mechanical interference (EMI) SERIES EHG Versus Thermostat (typical application) Dimensions 90.00 85.00 80.00 Temperature C 75.00 70.00 65.00.75 in. 95.25 mm 60.00 55.00 50.00 0.00 10.00 20.00 0.00 40.00 50.00 60.00 70.00 80.00 90.00 Elapsed Time 1.85 in. 46.99 mm Thermostat EHG SL10 with C hysteresis 40
EHG SL10 The EHG SL10 is a key component in a powerful system that integrates a heater, an adjustable set point temperature controller, high/low temperature alert, power switching device and a safety high temperature limit. This agency recognized controller/safety limit meets UL 1998 and CE 6070 requirements. The optional display/ communications module can be easily upgraded and added in the field to provide digital display indication, adjustment of set point, RS485 Modbus communications and other Human Machine Interface (HMI) features. This system allows you to purchase only what is needed for your application. The easy to install, compact design, inherent reliability and integrated limit functions make this controller a tremendous value. The controller is designed for easy integration with Watlow heaters simplifying engineering, reducing component count on new equipment and decreasing cost of ownership. For original equipment manufacturers (OEMs), CE, Semi-S2 compliance and UL recognition will reduce time and costs necessary for global agency testing and validation. Features and Benefits Process controller and safety limit in one package Meets UL 1998 and CE 6070 requirements Eliminates the need for a thermal fuse on a heater Eliminates replacement of heater when fuse fails Optional display/communications module Allows easy upgrade on to base device Offers low cost field upgrade Provides easy, snap-on installation Accurate and flexible temperature process controller Replaces problematic bi-metal thermostats with accurate electronic temperature process controller Allows easy change of process parameters Ambient operating temperature range 0 to 70 C (2 to158 F) Increases reliability when mounting in harsh temperature environments or in close proximity to heaters Health check diagnostics Monitors maximum heater process temperature, maximum ambient temperature and thermocouple operation Provides health check signal to inform operator that the process is working correctly Universal power supply Allows an input of 85 to 264VÅ(ac), 50/60Hz Provides safe control of up to 2400 watts with 10 amp switching in both controller and safety limit Integrated high/low temperature alert signal relay Provides dry contact output to activate external alarm or process function Signals control status with three integrated LEDs Allows a signal of up to two amps 0Vı(ac/dc) to alert if process temperature is out of range limits Can be switched from on-off and PID algorithm Increases product life (on-off control is default) Offers selectable PID control algorithm for tighter temperature uniformity Universal 1 8 turn mounting bracket Allows mounting to most surfaces Provides flexible mounting either horizontally or vertically 41
EHG SL10 Specifications Operational EHG SL10 can be added to most flexible heater configurations Two, Type K thermocouple inputs - process temperature control and safety limit Process temperature output - 10 amp no-arc relay Safety limit alarm - 10 amp relay High/low temperature alert - 2 amp 0Vı(ac/dc), Form A (single pole, normally open contact) On-off temperature controller algorithm, upgraded via communications to PID algorithm (minimum cycle time 0 seconds) Standard Molex connectors Controllers are integral to the heater and are supplied by Watlow Power Isolated universal power supply 85 to 264VÅ(ac), 50/60Hz Up to 2400 watts with 10 amp switching capability No-arc Relay 10 amp switching 4.5 million cycles Environmental Ambient operating temperature range 0 to 70 C (2 to 158 F) Agency Approvals UL 1998/ C-UL CE 6070 Semi-S2 Ordering Information To order, complete the model number on the right with the information below. E H G 2 - - Basic controller is purchased only as part of a heater assembly. Controller CNTL = Base unit (EHG2-CNTL-0000) MODU = Module Module DISP = With display module COMS = With communication module DCSM = With display and communication module Additional cables for wiring parallel heater circuits (daisy-chaining) in gas line and other assemblies 4800-0012 - Long cable 4800-0022 - Long terminating cable 4800-0011 - Short cable 4800-0021 - Short terminating cable Switching Device Comparison Chart T-Stat Solid State Relay Watlow No-arc Relay Amperage at 25 C (77 F) 10 amps 10 amps 10 amps Amperage at 70 C (158 F) 10 amps De-rate significantly and add 10 amps heat sink and air cooling Output device life at 10 amps Rated 100,000 at 70 C (158 F) Greater than 10 million cycles Greater than 4.5 million cycles at 25 C (77 F) at 70 C (158 F) 42
Watlow offers several styles of sensors for use with flexible heaters. These sensors are available as preset or adjustable thermostats, thermocouples, thermistors, RTDs or thermal fuses. They can be integrally mounted (encapsulated in silicone rubber) to sense the temperature of either the part or the heater sheath. The thermostats can also be ordered separate from the heater, allowing direct control of your process temperature, if desired. Pre-Set Thermostats Several styles of non-adjustable, pre-set thermostats are available from Watlow. Thermostats separate from the heater are encapsulated in silicone rubber, and are available with standard 12 inch (05 mm) leads unless otherwise specified. /4 in. (19 mm) Ref. /8 in. (10 mm) 1 /4 in. (45 mm) /4 in. (19 mm) Thermocouples, thermistors, RTDs and thermal fuses are usually mounted to the heater under a vulcanized protective cap of silicone rubber sheath material. This drawing shows a typical mounting style for a thermocouple. Note: Precise part temperature control with preset thermostats requires prototyping and field testing. Ref. 11 /16 in. (18 mm) 1 1 /4 in. (2 mm) /16 in. (5 mm) /4 in. (19 mm) 2 1 /2 in. (64 mm) 1 1 /2 in. (8 mm) T-10 1 1 /2 in. (8 mm) T-207 Pre-Set Thermostats (Non-Adjustable) Thermocouple Thermostat Maximum Volts Temperature Settings Agency Approvals Model Watts AC Available C ( F) UR cur VDE T-10 600/960 120/240 *50-149±5 (125-00±10) yes yes yes T-207 1500 120/240 4/1±4.4 (40/55±8) yes yes yes 1500 120/240 16/24±4.4 (60/75±8) yes yes yes 1500 120/240 5/4±4.4 (95/110±8) yes yes yes 1500 120/240 6/71±4.4 (145/160±8) yes yes yes Notes: When ordering a pre-set thermostat separate from the heater, simply add the prefix S to the model number. (Example: ST-10) See next page. Snap action preset temperatures on the T-207 are close/open settings. T-10 thermostats are manufactured for specific preset temperatures. Available in 25 F increments. Other temperature ranges and voltages are available on special order. Minimum quantities apply, so consult factory before ordering. UR and C-UR are registered trademarks of Underwriter's Laboratories, Inc. Adjustable Thermostats The B-200 thermostat features a maximum rating of 1500 watts at 120/240VÅ(ac). The following temperature ranges are available: Model B-200-2: 40 to 260 C (100 to 500 F) Model B-200-: -5 to 165 C (25 to 0 F) The B-200 thermostat can be integrally mounted to the heater with a bonded protective cap of silicone rubber sheath material. 4
ST-10 ST-207 ST-207E Separate Heater Accessories Available From Stock Pre-Set Thermostats Separate from Heater These are offered to allow direct control of your process temperature, so you are not limited to controlling only the heater temperature when using stock heaters. Pre-set thermostats are encapsulated in silicone rubber with standard 12-inch leads. The same temperature ranges, ratings and sizes are available on these thermostats. When ordering, add S prefix to the model number to indicate separate item. (Examples: ST-10 and ST-207) 0.50 in. (1 mm) 0.4 in. (9 mm) 0.50 in. (1 mm) Ref. 2.25 in. (57 mm) 1.75 in. (44 mm) 1.25 in. (2 mm) 0.218 in. (6 mm) Dia. Typ. 0.50 in. (1 mm) 1 in. (25 mm) Notes: For direct control of air temperature as is required in enclosure heating applications, specify thermostat model number ST-207E. This is a modified ST-207 mounted on 1 2 inch thick G-10 circuit board with the thermostat s metal cap exposed to sense air temperature. 2 7 8 in. 1 5 8 in. Adjustable Thermostats Separate From Heater The Model B-200 adjustable thermostat can be ordered as a separate item. The same model numbers and temperature ranges indicated under Adjustable Thermostats are available. When ordering, simply note that you want the B-200 separate from the heater. 11 16" B-200 1 2" 44
Tstat Part #- 0 0 Tstat Part # ST10 ST207 ST207E (sense air) B200-2* (100-500 F) B200-* (25-0 F) *Will not include any lead options. Options 0 = None Sensors 0 = None T10 Set F A = 125 B = 150 E = 175 F = 200 G = 225 H = 250 J = 275 K = 00 T207 Set F 1 = 40/55 2 = 60/75 = 95/110 4 = 145/160 Lead Insulation 1 = 1180 UL R/C** 2 = 1180 C-UL R/C 4 = 14 18 GA 6 = 1199 CSA 9 = Type E Teflon A = 1180VDE* B = 1199VDE* * 1180VDE denotes a C-UL heater plus a VDE stamp. **No charge for first foot of 1180 black Teflon lead (1B). Standard lead for T207 is 16 ga. black. Standard lead for T10 is 22 ga. black. Lead Length* A = 8 in. B = 12 in. E = 18 in. F = 24 in. G = 0 in. H = 6 in. J = 40 in. K = 4 ft L = 5 ft M = 6 ft N = 7 ft P = 8 ft R = 9 ft S = 10 ft T = 12 ft U = 15 ft V = 18 ft W = 20 ft Y = 22 ft 1 = 25 ft 2 = 0 ft * Customer specified length must be noted in inches when ordering. Teflon is a registered trademark of E.I. du Pont de Nemours & Company. 45