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Series 733/734
Total
Customer
Satisfaction
3 Year
Warranty
Time/Temperature
Control
Service Manual
Watlow Controls, 1241 Bundy Blvd., P.O. BOX 5580, Winona, MN 55987-5580, Phone: 507/454-5300, Fax: 507/452-4507
0600-0008-0000 Rev D $10.00
November 1995 Made in the U.S.A.
Supersedes without change: W733-XSMN Rev D00
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Contents This manual is a supplement to the Series 733/734 Program Manual. It is for configuring, servicing and calibrating your control. Use this manual in conjunc- tion with the Series 733/734 Program Manual and Data Communications manual. PageItem Chapter 1 Chapter 3 3 Install and Wire the Series 733/734 16 The Service Mode 3 Dimensions 17 Service Parameters 3 Panel Cutout 18 Service Mode Table 4 How to Wire the Series 733/734 5 Power Wiring Chapter 4 5 Input Wiring 20 Auto-Tuning 8 Output
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Install Chapter 1 Install and Wire the Series 733/734 Front panel mounting for ease of installation and service. WATL W Figure 1 - EVENT READY LOAD 1 Series 733 and 734 1.975 Dimensions. (50 mm) 10.625" (270 mm) MENUS 1 2 3 10.625" (270 mm) WATL W 4 5 6 7 8 9 3.25" EVENT READY LOAD 1 (83 mm) MENUS 10 12 11 1 3 5 2 4 6 7 81 9 0 11 12 SERIES 734 SERIES 733 3.25" (83 mm) Series 733 Series 734 10.13" (257 mm) 9.78" (248 mm) R 0.125" (3 mm) Max. 3.13" (80 mm) Figure 2 - ÷ Panel Cutout Panel
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Wiring How to Wire the Series 733/734 The Series 733/734 wiring is illustrated by model number option. Check the terminal designation sticker on the control and compare your model number to those shown here and also the model number breakdown on the inside back cover of this manual. When you apply power without sensor inputs on the terminal strip, the Series 733/734 display alternates parameter data and Er07 at a 3 second rate. This error indicates an open sensor or A/D error. Remove power to
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Wiring Power Wiring Figure 7 - 24V (VAC) Power Wiring. º WARNING: L2 To avoid potential electric shock, use Fuse National Electric L1 Code (NEC) safety practices when wiring and connect- ing this unit to a power source and to electrical sensors or Input Wiring peripheral devices. Use this wiring connector as a reference for terminal orientation. Each indi- vidual wiring breakdown will only show the terminals used. This connector only applies to input wiring and communications wiring. Fig
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Input Wiring Thermocouple Input 73XX-1XXX-XXXX ÷(Dual Zone Only) ÷ 73XX-4XXX-XXXX NOTE: 73XX-6XXX-XXXX 73XX-4XXX-XXXX Dual-zone thermo- couple units require Zone 1 Zone 2 at least one un- grounded 1 4 thermocouple. + + 2 5 Figure 9 - Thermocouple Wiring. - - 3 6 RTD Input (Dual Zone Only) 73XX-2XXX-XXXX 73XX-5XXX-XXXX 73XX-5XXX-XXXX Zone 1 Zone 2 3 Wire RTD 3 Wire RTD 1 4 2 5 Figure 10 - 3 6 2 or 3 Wire RTD Wiring. 1 4 2 5 3 6 2 Wire RTD 2 Wire RTD 6 WATLOW Series 733/734 Service Manual Install
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Input Wiring 0-5VDC or 0-10VDC Process Input Model # 73XX-6XXX-XXXX (Dual Zone Only) Zone 2 Figure 11 - 0-5VDC or 0-10VDC Process Input Wiring. 4 + 5 - 6 0-20mA or 4-20mA Process Input Model # 73XX-6XXX-XXXX (Dual Zone Only) Zone 2 - 4 Figure 12 - 0-20mA or 4-20mA IDC Process Input 5 Wiring. + 6 Install & Wire, Chapter 1 7 WATLOW Series 733/734 Service Manual
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Output 1 Wiring AC Output Wiring - Zone 1 Solid State Relay with Mechanical Relay with Contact Suppression Contact Suppression Form A, 0.4 Amps Form A, 1 Amp Off state impedance: 20K max. Off state impedance: 20K min. 73XX-XBXX-XXXX 73XX-XDXX-XXXX Solid State Relay without Solid State Relay without Contact Suppression Contact Suppression Form A, 0.4Amps Form A, 1 Amp Off state impedance: 31M max. Off state impedance: 20k max. 73XX-XKXX-XXXX 73XX-XEXX-XXXX Figure 13 - AC Output 1 Wiring. Fuse
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Output 2 Wiring AC Output Wiring - Zone 2 Solid State Relay with Mechanical Relay with Contact Suppression Contact Suppression Form A, 0.4 Amps Form A, 1 Amp Off state impedance: 20K max. Off state impedance: 20K min. 73XX-XXBX-XXXX 73XX-XXDX-XXXX Solid State Relay without Contact Suppression Form A, 04 Amps Off state impedance: 31M max. 73XX-XXKX-XXXX External Load NO L2 COM L1 Fuse Figure 15 - AC Output 2 Wiring. DC Output Wiring - Zone 2 Switched DC (Open Collector) 4-20mA Process Output
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Optional Wiring Event Input Wiring ÷ Event Input 1 2 Event Inputs NOTE: Non-isolated Event Input is not 73XX-XXX1-XXXX available on stan- dard Series 733/734 controls. Consult factory for more information. Event Input 2 Figure 17 - Event Input Wiring. Common Event Output Wiring 4 Event Outputs Open Collector, Non-isolated 5mA Maximum Per Event Customer Supplied 73XX-XXX1-XXXX Alarm Event 1 - SSR Event 2 - + SSR Event 3 - + SSR Event 4 - + SSR Figure 18 - - + Event Output Wiring. + Internal +5
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System Example L1 L2 A001-0249-0001 Over Temp Light 9 6 Coil 142A-36XX-1200 NC NO UL recognized safety limit control 3 C High Limit 2 Figure 20 - Mechanical Contactor System Wiring Example. TC 73XX-1CA0-AXXX (-) (+) L1 L2 Reset Limit Normally Open Sensor Momentary Switch SSR-240-10G-DC1 (+) (-) 3 (-) Process Sensor (+) 2 L2 A001-0249-0001 1 1 3 2 4 5 2 3 6 69 7 (+) 4 Series 733 2 73XX-1CA0-AXXX 8 (-) 3 5 Figure 21 - 32 Series 733/734 6 910 Ladder Diagram SSR-240-10G-DC1 Example. (+) (-) 1 CR-
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Setup Chapter 2 The Setup Mode Use the key sequence below to enter the Setup Mode. Advancing Through The Setup Mode Press the TIME key . Select or Change Setup Data Within The Mode Use the UP/DOWN keys . After 1 minute with no key activactions, the Series 733/734 reverts to the Operation mode [0)¼0]. Figure 22 - Setup Mode Key Flow. WATL W = Parameter may not appear depending on control configuration EVENT READY LOAD 1 MENUS 1 3 5 2 4 6 7 81 9 0 11 12 = Only appears if your unit has communic
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Setup Display alternates between parameter and programmed data. Setup Parameters Celsius_Fahrenheit: Selects the units of temperature measurement. C_F Range: F or C Default: F F Guard Band: Determines the process operating window (deviation) that both Zone 1 & 2 must be within before a menu is allowed to run. If you are within the gb guard band the READY LED is on and a menu can be run. It you are out of the guard band, the READY LED is OFF and the menu will not run. 4000 Range: 1 to 4000
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Setup Display alternates between parameter and programmed data. Alarm Latching: Selects whether the alarm output is latching or non-latching. LAt This parameter only appears if your unit has alarms, and AL1 no and AL2 no. nL Range: LA or nL Default: nL Input Type 1: Selects the sensor input type for Zone 1. Only those input types InP1 which are compatible with your unit will appear. See the model number information on the inside back cover for your type. J Range: J, K (appears as H), E,
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Setup Display alternates Range Low 2: Selects the low end of the operating range for Zone 2. This parameter between parameter and programmed data. determines the low end of the process input, set point and alarms. See the model number and specification information on the inside back cover, and Table 1 below for rL2 sensor range values. 0.0VDC, 0mA or 4mA represent Range Low (rL) for process inputs and outputs. The process input is linearly scaled between rL and rH. 32 This parameter only ap
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Setup Table 2 - Setup Mode Setup Mode Use this page as a master copy for your Series 733/734 Setup mode parameters. Parameters and Descriptions. Do not enter any values here; make photocopies instead. Parameter Value Range Factory Default Appears If: C_F C or F F gb 1 to 4000°F/2222°C 4000°F/2222°C rtd JIS or din din Input type is RTD tncP On or OFF OFF tS hrnn or nnSc nnSc SIL On or OFF OFF Unit has alarms, AL1 no & AL2 no LAt LA or nL nL Unit has alarms, AL1 no & AL2 no InP1 J, K (appears
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Service Chapter 3 The Service Mode Enter the Service mode by pressing the key sequence illustrated below. The display shows the [AUt1] parameter. Move through the Service mode by pressing the TIME key . Use the UP/DOWN keys to select data. After 1 minute without key activa- tions, the Series 733/734 reverts to the Operation mode [0)¼0]. = Parameter may not appear depending on control configuration WATL W EVENT READY LOAD 1 MENUS 1 3 5 2 4 6 7 81 9 0 11 12 SERIES 733 Figure 23 - ( ) AUt1
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Service Display alternates between parameter and Service Parameters programmed data. Auto-tune Zone 1: Initiates auto-tune for Zone 1. For more information on tuning, see Chapter 4, Page 19. AUt1 Range: 0 = off, 1 = slow, 2 = medium, 3 = fast Default: 0 0 Auto-tune Zone 2: Initiates auto-tune for Zone 2. For more information on tuning, see Chapter 4, Page 19. AUt2 Range: 0 = off, 1 = slow, 2 = medium, 3 = fast Default: 0 0 Proportional Band 1: A proportional band expressed in degrees F
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Service Display alternates between parameter and programmed data. Cycle Time 2: Expressed in seconds, time for a controller to complete one ON/ Ct2 OFF cycle for Zone 2. Time between successive turn ons. This parameter only 5 appears if you have a dual zone control, and Pb2 0. Range: 1 to 60 seconds Default: 5 Menu Steps: Determines the maximum number of steps allowed in a menu. StP Range: 1 to 3 Default: 3 3 Loop Fail Check: This parameter checks for an open or shorted sensor and Loo
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Tuning Chapter 4 Tuning Auto-tuning Auto-tuning applies to Zone 1 or 2. The auto-tuning procedure operates on a thermal response value — slow, medium, or fast. Use the slow thermal response when your process does not reach set point too rapidly, or if it usually does not exceed set point a lot. A fast thermal response produces a rapid temperature change over a short period of time. Once the auto-tune sequence has begun, the Zone 1 or 2 proportional band is ÷ set to 0 and the control goes into
