STEP Up

How does the STEP Up Control interface with the STEP Up Relay Box or the STEP Up Custom Relay Panel?

STEP Up Control The STEP Up Control contains all of the logic for the Control. It does not have a transformer or any override on-off-auto switches. Wadsworth must provide a STEP Up Relay Override Box. For complete project load wiring you may require a Customized Relay Panel providing load power to equipment.

The STEP Up Control board has optical relay outputs. These outputs send a signal to the STEP Up Relay Override Box (M-5001). The STEP Up Relay Override Box contains 11 relays (these are DPDT 5 amp). The transition between the STEP Up Control outputs and the STEP Up Relay Override Box is critical. The optical relay outputs need to be connected to the small relays in the STEP Up Relay Override Box or it will severely damage the STEP Up Control board.

What is included in the basic STEP Up Relay Override Box (M-5001)? ..

• Transformer
• On - Off - Auto switches
• 11 relays (DPDT 5 amp)
• Easy to wire terminal strips
• NEMA 1 cabinet
• UL approved
• List price $497 (as of July, 2007)

If the project has equipment that requires larger relays, then the STEP Up Relay Overrides are incorporated into a STEP Up Custom Relay Panel.

What is included in a STEP Up Custom Relay Panel?

• Transformer
• On - Off - Auto switches
• 11 relays (DPDT 5 amp)
• Easy to wire terminal strip
• Larger relays per requirements of the equipment. Examples of equipment that require larger relays (exhaust fans, HAF fans, pad pump, HID lights
• loads over 3.75 amps)
• NEMA 12 cabinet
• UL approved

Examples of equipment that requires larger relays:

Scenario 1: The greenhouse has this equipment:

• 1 roll-up wall
• 1 curtain system
• 2 Unit Heaters(No HAF, exhaust fans, or Jet Fan Tubes)

This project includes a STEP Up Control and the basic STEP Up Relay Override box.
Equipment in this greenhouse has small loads and does not require larger relays.
The STEP Up Control sends signals to the STEP Up Relay Override box.
This in turn forwards a signal to the Vent Control Box for the roll-up, and a
signal to the Curtain Control Box to move the curtain, and to the heaters for heat.

Step Up Control

Step Up Relay Override Panel

Vent Control Box

Curtain Control Box

Scenario 2: The greenhouse has this equipment:

• 1 roll-up wall
• 1 curtain system
• 2 Unit Heaters
• 4 HAF
• 1 2-speed exhaust fan, 220v

Because some of the equipment in this greenhouse requires larger relays, and if those relays are not already installed in your wiring; then a Customized Relay Panel needs to be included with the STEP Up Control.

The STEP Up Control sends signals to the Custom Relay Panel. This forwards signals to the Vent and Curtain Control boxes which operate vents and the curtain. It forwards signals via the 5 amp DPDT relays to the heaters and to the larger relays which turn on the exhaust fans.