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, VÎ(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 120VÅ(ac) (+10 percent, -15 percent)

•200 to 480VÅ(ac) (+10 percent, -15 percent)

•200 to 600VÅ(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 power up for alarm

•Alarm indication LEDs, shorted SCR, open heater, fuse

•Electromechanical relay, form C contact, software configurable

•Minimum load current 10mA @ 5VÎ(dc)

•Rated resistive loads: 3 amps @ 250VÅ(ac) or 30VÎ(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 InputAnalog

•Field selectable linear voltage and current of low and high points within 0-20mA and 0-10VÎ(dc)

•Manual control input through front panel

•Factory default 4-20mA input

•Voltage input impedance 11kW nominal

•Current input impedance 100W nominal

Digital

•On-board digital programmer/display and optional serial communications

Retransmit

•Field selectable and scalable within 0-20mA,

800W maximum or 0-10VÎ(dc), load, 1KW minimum load. The default is 4-20mA

•Resolution:

mA ranges = ±5µA

VÎ(dc) = ranges 2.5mV nominal

•Calibration accuracy: mA ranges = ±20µA

VÎ(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 programmer/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 240VÅ(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 2200VÅ(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 (11⁄8 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.