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Staged STEP Controls  Inegrated STEP Controls
Features S-1608 STEP 50A STEP 500 STEP Up EnviroSTEP VersiSTEP 
Number of Zones 1 1 1 1 1 8-Jan
Number of Outputsor Stages 4 stages 5 stages
2 heat
3 cool
8 stages
3 heat
5 cool

6 stages
2 heat
4 cool

12 outputs 24 outputs
with
optional 16
Set point periods One Two
Day/ Night
Photo cell

Two
Day/ Night
Photo cell

Three
Day/ Night/DIF
24 hr clock or sunrise sunset
Three
Day/ Night/DIF
24 hr clock or sunrise sunset
Three
Day/ Night/DIF
24 hr clock or sunrise sunset
DIF Control No No No Yes Yes Yes
Ramping No No No Yes Yes Yes
Sensors 1 temp 1 temp 2 temp
1 inside,
1 outside
1 temp
1 RH (optional)
1 temp,
RH, 1 outside temp
Additional options*

1 temp,
RH, 1 outside temp
Additional options*

Weather Protection Weather Guard Weather Guard Weather Guard Weather Guard Weather Station Weather Station
Manual Override Switches No Yes
Toggle
Yes
Toggle
Yes, electronic and
toggle on contactor panel
Yes
Toggle
YesT
oggle
Display Temp display, mode, output status No temp display, lights indicatestages, day/night status Temp display, lightsindicate stages,day/night status Temp display, lights indicate stages, fullmenu program Temp display, lights indicate stages, fullmenu program Temp display, lights indicate stages, fullmenu program
Navigation Buttons Two knobs Two knobs Knob and button Key pad Key pad
Records Data No No No Logs and graphs of avg temp every 15minutes for 7 days, Avg day/night Logs and graphs 15 minutes avg. for 7 days, for all sensor input and equipment output Logs and graphs 15 minutes avg. for 7 days, for all sensor input and equipmentoutput 
Types of equipment itcan control Heating, coolingequipment. Heating, coolingequipment. Heating, cooling Heating, cooling Virtually any Virtually any
Variable speed or modulatingequipment No Yes, limited to old Barber Coleman Yes, limited to old BarberColeman Yes
1 stage 0-10V or 4-20mA
Yes
2 outputs
0-10 VDC
Yes
4 outputs
0-10 VDC
Light Control No No No No Yes Yes
Mist Control No No No Yes
(cycle timer)
Yes Yes
Irrigation Control No No No No Yes Yes
C02 control No No No No Yes Yes
Increments Vents No Via vent control Via vent control Yes Yes Yes
RecommendedVent Control
LST w/ Internal orExternal Limits
Versatile Vent w/Internal Limits
OR
Incremental w/External Limits
Versatile Vent w/Internal Limits
OR
Incremental w/External Limits
Versatile VentOR
LST w/Internal Limits
Versatile Vent
OR
LST w/Internal Limits
Versatile VentOR
LST w/Internal Limits
Optional Equipment
• Weather Guard• Aspirated Sensor
• Alarm Manager(can send an alarm signal but it uses an output, can use a t-stat)
• Weather Guard
• Alarm Manager(needs t-stats)
• Weather Guard
• Alarm Manager(needs t-stats)
• Weather Guard
• Alarm Manager
• Alarm Manager
• Weather Station
• STEPsaver
• Alarm Manager
• Sensors:
o Soil temp
o Light
o Hot water
o CO 2
• Weather Station
• STEPsaver
• Alarm Manager
• Sensors:
o Soil temp
o Light
o Hot water
o CO 2
Total Package MiniSTEP
Includes temp sensor and
75’ of cable, contactor paneland blue
prints
S-1608
Includes temp sensor and
75’ of cable – no contactorpanel
Includes aspirated tempsensor and 100’ ofcable Includes aspirated temp sensor and 100’ of cable andoutdoor temp sensor Includes aspirated and 100’ of cable.

Needs contactorpanel to operate.Call for pricing.
Includes aspirated temp and RH sensorand 100’ of cable andoutdoor temp sensorp sensor Includes aspirated temp and RH sensorand 100’ of cable andoutdoor temp sensor


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