Watlow Electric Power Series - Manual (Page 2)

Specifications
Power Bases
• Single phase, (2 SCRs)
• 3 phase, 2 leg control, (4 SCRs)
Resistive load only, zero cross firing only
• 3 phase, 3 leg control, (6 SCRs)
• 3 phase, 3 leg control, (6 SCRs) for 4-wire wye loads
• Multizone, two and three single-phase zones
Output Control Options
• Zero cross contactor, V
Î (dc) input
• Zero cross control, fixed time base
• Time base one or four seconds with digital programmer
• Zero cross control, variable time base
• Phase angle control and phase angle control with current limit
(not for 3-phase, 2-leg models)
• Soft start factory default four seconds upon power-up, and
adjustable from 0.0 to 120 seconds
• Soft start upon input signal change, output rate of change
adjustable to limit max rate of change from 0.1 to 100 percent
per 0.1 second. Factory default 10 percent
• Current transformer included when required
• Line voltage compensated (variable time base and phase angle
controllers only)
• Standby or non-operational mode
Output Voltage and Current Rating
• 24 to 120V
Å (ac) (+10 percent, -15 percent)
• 200 to 480V Å (ac) (+10 percent, -15 percent)
• 200 to 600V Å (ac) (+10 percent, -15 percent)
• 65 through 250 amps per pole, model dependent; see Output
Amperage Chart and Rating Curves
• Minimum load 1 amp rms ac
• Maximum leakage current 5mA
Alarms
• Single alarm relay
• Latching or non-latching
• Separate high and low values
• Alarm silencing (inhibit) on po wer up for alarm
• Alarm indication LEDs, shorted SCR, open heater, fuse
• Electromechanical relay, form C contact, software
configurable
• Minimum load current 10mA @ 5V
Î (dc)
• Rated resistive loads: 3 amps @ 250V Å (ac) or 30V Î (dc)
max., inductive load rating 1.5 amps with a power factor
≥
0.4 without contact suppression
Heater Bakeout
• For single-phase (phase to neutral) and 3-phase 6 SCR
models only (not for 3-phase, 2-leg models)
• Soft start with over current trip, runs until programmed bakeout
time expires, then goes burst or phase angle firing. Factory
default of 24 hours
• Adjustable 0 - 9999 minutes with over current trip
• Internal current transformer included
Command Signal Input
Analog
• Field selectable linear voltage and current of low and high
points within 0-20mA and 0-10V Î (dc)
• Manual control input through front panel
• Factory default 4-20mA input
• Voltage input impedance 11k
W
nominal
• Current input impedance 100 W nominal
Digital
• On-board digital programmer/display and optional serial
communications
Retransmit
• Field selectable and scalable within 0-20mA,
800 W maximum or 0-10V Î (dc), load, 1K W minimum load.
The default is 4-20mA
• Resolution:
mA ranges = ±5µA
V
Î (dc) = ranges 2.5mV nominal
• Calibration accuracy:
mA ranges = ±20µA
V
Î (dc) ranges = 10mV nominal
• Temperature stability: 100ppm°C
Digital Programmer/Display and Communications
Capabilities
• Programming functions
• Adjust input and output control type, alarms and soft start,
heater bakeout and current limit prompts
• Monitoring functions
• Display input and output values along with actual
output current
• Data retention of digital prog rammer/display upon power failure
via nonvolatile memory
Serial Communications
• RS-232 for single drop control
• EIA-485 for single or multidrop control
• 32 units maximum can be connected.With additional
485 repeater hardware, up to 247 units may be connected
• Isolated
• Modbus
™ RTU protocol
• 1200, 2400, 4800, 9600, 19200 baud rates
Controller Power Supply
• Universal line voltage input range 100 to 240V
Å (ac)
(+10 percent, -15 percent) at 55VA max
• 50/60Hz ± 5 percent line frequency independent
• Controller line voltage for electronic power supply can be run
on separate line voltage
Natural Convection and Fan Cooled Models
• Cabinet venting may be required
• See Amperage chart on the back page for all models.
Power Dissipation (Watts)
• Approximately 1.25 watts/amp per controlled leg
Isolation
• Command signal to load and line/load to ground
2200V Å (ac) minimum
• On-board semiconductor fuses provide SCR protection
Mounting
• Mounts on a removable subplate
• Heat sink fins must be mounted in vertical orientation
High Current Terminals
• Touch safe
• 10 mm (
3 ⁄
8
in.) Allen head compression terminals will accept
#6 AWG to 350 MCM wire. Allen wrench adapter (included) for
10 mm (
3 ⁄
8
in.) socket, 6 point only
• Torque to 180 in.-lbs (20.3 Nm)
• Wire strip to 30 mm (1
1 ⁄
8
in.)
Controller Terminals
• Touch safe
• 2.5 mm (
1 ⁄
8
in.) blade screwdriver, accepts 12-22 AWG or
2 No. 22-18 AWG wires
• Torque to 8 in.-lbs (0.9 Nm)
• Wire strip to 6 mm (0.24 in.)
Operating Environment
• 50°C (122°F) base rating
• 0 to 60°C (32 to 140°F) fan cooled
• 0 to 65°C (32 to 149°F) natural convection cooled
• 0 to 90 percent RH, non-condensing
• Meets EN50178, Pollution degree three
Storage Temperature
• -40 to 85°C (-40 to 185°F)
Shipping Weight
• 10.3 kg (23 lbs)
Agency Approvals
• UL
® 508 listed, File #E73741, Vol. three, Sec.two
• C-UL ® listed to C22.2 NO. 14
• VDE EN 50178 License 115054
• CE 89/336/EEC (EN61326), Class A with filter,
CE 73/23/EEC (EN50178)
Modbus™ is a trademark of Schneider Automation, Inc.