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Appendix
34
WATLOW Series 733/734 Service Manual
Specific
Specifications
Control Mode
• Single or dual input, single or dual output, single alarm.
• EIA/TIA-422A, EIA/TIA-423A, or EIA/TIA-485 data
communications.
• ON/OFF: Determined by the HYS
X parameter for
Outputs 1 and 2.
• PID Parameters:
• Proportional band: 0 to 999°F/0 to 555°C/0 to 999
units.
• Reset: 0.00 to 9.99 repeats per minute.
• Rate: 0.00 to 9.99 minutes.
• Cycle time: 1 to 60 seconds.
Operator Interface
• Membrane front panel.
• Single, four-digit 0.56" (14 mm) LED displays.
• TIME, TEMPERATURE, UP/DOWN & 1-12 menu
keys.
Input
• Thermocouple, RTD and electrical process input.
• Automatic cold junction compensation for thermocouple.
• RTD input, 2- or 3-wire, platinum, 100 @ 0°C, solfware
selectable: JIS curve #3916 (0.003916 / °C) or DIN
curve #3850 (0.003850 / /°C).
• Sensor break protection de-energizes control outputs to
protect system.
• Grounded or ungrounded sensors. (Dual input requires
at least one ungrounded t/c. See Chapter 1 of the
Series 733/734 Service Manual
.)
• °F, °C or process variable units are user selectable.
• Operating ranges user selectable.
J t/c: 32 to 1382°F or 0 to 750°C
K t/c: 32 to 2282°F or 0 to 1250°C
E t/c: 32 to 1220°F or 0 to 660°C
RTD: 32 to 1112°F or 0 to 600°C
Process: -500 to 3500 units
Primary Output (Zone 1)
• Solid-state Relay, Form A, 0.4A @ 120/208/240VÅ
(VAC), 30VA pilot duty @ 120/208/240VÅ (VAC), opto-
isolated, zero-cross switching. Off state impedance is
20K minimum with contact suppression, 31M without
contact suppression.
• Electromechanical Relay, Form A, 1A @ 24/120/208/
240VÅ (VAC), 1/8 hp. @ 120/240VÅ (VAC), 125VA pilot
duty @ 24/120/208/240VÅ (VAC). Off state impedance is
20K minimum. 200m contact resistance, maximum.
• Switched DC, 500 minimum load resistance, 1K load,
9mA minimum, 22mA maximum, non-isolated.
• 0-20mA/4-20mA reverse or direct into a 600 maximum
load impedance, non-isolated.
• 0-5VÎ (VDC)/0-10VÎ (VDC) reverse or direct into a
10K minimum load impedance, non-isolated.
Secondary Output (Zone 2)
• Solid-state Relay, Form A, 0.4A @ 120/208/240VÅ
(VAC), 30VA pilot duty @ 120/208/240VÅ (VAC),
opto-isolated, zero-cross switching. Off state imped-
ance is 20K minimum with contact suppression,
31M without contact suppression.
• Electromechanical Relay, Form A, 1A @ 24/120/208/
240VÅ (VAC), 1/8 hp. @ 120/240VÅ (VAC), 125VA
pilot duty @ 24/120/208/240VÅ (VAC). Off state
impedance is 20K minimum. 200m contact
resistance, maximum.
• Switched DC, 500 minimum load resistance, 1K
load, 9mA minimum, 22mA maximum, non-isolated.
• 0-20mA/4-20mA reverse or direct into a 600 maximum
load impedance, non-isolated.
• 0-5VÎ (VDC)/0-10VÎ (VDC) reverse or direct into a
10K minimum load impedance, non-isolated.
Alarms
• Electromechanical Relay, Form A, 1A @ 24/120/208/
240VÅ (VAC), 1/8 hp. @ 120/240VÅ (VAC), 125VA
pilot duty @ 24/120/208/240VÅ (VAC). Off state
impedance is 20K minimum. 200m contact resis-
tance, maximum.
• Latching or non-latching.
• Process or deviation.
• Separate high and low values.
• Alarm silencing (inhibit) on power up for alarm.
Event Outputs
• Switched DC, non-isolated, 5VÎ (VDC), 5mA maximum.
Accuracy
• Calibration Accuracy & Sensor Conformity: ± 0.1% of
span, ± 1LSD, 77°F ± 5°F(25°C ±3°C) minimum.
• Accuracy Span: Normally 1000° minimum span.
• Temperature Stability: < 0.2°F/°F (0.2°C/°C) change
in ambient.
• Voltage Stability: ± 0.01% of span / % of rated line
voltage.
Communications
• Serial data communications.
• EIA/TIA-422A or EIA/TIA-423A (EIA/TIA-232C
compatible) or EIA/TIA-485.
• ANSI X3.28 protocol, or XON/XOFF protocol.
• Isolated.
Agency Approvals
• UL® 873, File #E43684.
• CSA Certified, File #LR30586, C22.2.
• Select models CE approved. Consult factory for details.
Electronic Incorporated Class III Control, Type 2 action.
Connectors
• Compression type screw terminals and universal
Mate-n-Lok.
Power
• 24VÅ (VAC) +10%, - 15%.
• 50 to 60 Hz ± 3%.
• Consumption 6 - 10VA.
• For CE-approved models, input power limited to 15
watts maximum. All components are rated for a
maximum of 15 watts.
Operating Environment
• 32 to 176°F/0 to 80°C.
• 0 to 90% RH, non-condensing.
Dimensions
733A-xxxx-xxxx (horizontal) models:
• Height: 3.28" 83 mm
• Width: 10.66" 271 mm
• Depth: 2.00" 51 mm
734A-xxxx-xxxx (vertical) models:
• Height: 10.66" 271 mm
• Width: 3.28" 83 mm
• Depth: 2.00" 51 mm