Primary Disconnects

Twisted Pair Disconnects

Primary Disconnects

Twisted Pair Disconnects

By connecting to the site’s emergency stop system, Twisted Pair Primary Dispenser Disconnects are designed to disconnect low voltage communication conductors. These conductors include dispenser data and credit card data two-wire, twisted pair circuits for a total of 4 conductors for up to 8, 12, or 16 dispensers.

Primary Disconnects - Twisted Pair - Highlight.psd

PRIMARY DISCONNECTS

Primary Disconnects provide emergency stop and service disconnect switches for dispenser data and credit card data circuits.


Emergency Stop

In the event of an emergency stop, the Primary Dispenser Disconnect will disconnect the dispenser data and credit card communication circuit.

Safe Maintenance

Toggle switches, located behind a lockable cover, allow maintenance personnel to isolate the conductors of a single dispenser for servicing purposes.

NFPA® and NEC® Code Compliance

Dispenser Disconnects provide compliance with NFPA® and NEC® Code requiring emergency disconnect and maintenance disconnects at all motor fuel dispensing facilities.

TWISTED PAIR PRIMARY DISPENSER DISCONNECTS

Primary disconnect for dispenser data and credit card data for dispensers equipped with two-wire, twisted pair circuits for data communication.

8 Dispenser Models

The 8 dispenser models connect to the emergency stop system by the means of a Class 2 transformer that is plugged into an outlet controlled by the emergency stop system.

12 & 16 Dispenser Models

The 12 or 16 dispenser models connect to the emergency stop system by the means of an AC power cord (or optional hardwire) that is plugged into an outlet controlled by the emergency stop system.

Individual Disconnects

Individual disconnects for each circuit types allows the disconnect to be located where the conductors enter the building. This can eliminate costly additional wiring and downtime that maybe required to re-route conductors to a central location such as the electrical room, during a retrofit or site upgrade.

Certifications/Approvals

  • cUL Listed 1238.
  • For compliance with NEC® 514.11 and NFPA® 30A Section 6.7 requirements for Emergency
    Disconnects at Motor Fuel Dispensing Facilities (controlled by E-Stop system).
  • For compliance with NEC® 514.13 requirements for Maintenance Disconnects at Motor Fuel
    Dispensing Facilities (switches to disconnect individual dispenser circuits for servicing).

General

Number of Dispenser Channels 8,12, or 16 Dispensers
E-Stop Control Input 8 Dispenser Models:
Powered by Class 2 24VAC
Transformer Connected to
120VAC E-Stop Controlled Outlet

12 0r 16 Dispenser Models:
NEMA 5-15P Cord Connected to
120VAC E-Stop Controlled Outlet
Number of Conductors Disconnected
per Dispenser
4 (14 Gauge Max)
Signal Circuit Rating Class 2, 48V Max, 3 Amp
Surge Protection Available Optional
Individual Channel Control Switches Yes
Lockable Channel Control Switches Yes
Secondary Remote Expansion
Output
Yes

Surge Protection Specifications (Gilbarco® Dispensers)

Dispenser Data Circuit & Credit Card
Communication Circuit
2 Wire Current Loop
Standoff Voltage 47.8V
Breakdown Voltage 56V Max +/- 5%
Clamp Voltage 77V Max
Peak Pulse Current 19.7A

Surge Protection Specifications (Wayne® Dispensers)

Dispenser Data Communication
Circuit
2 Wire Current Loop
Standoff Voltage 47.8V
Breakdown Voltage 56V Max +/- 5%
Clamp Voltage 77V Max
Peak Pulse Current 19.7A
Credit Card Communication Circuit 2 Wire RS-485
Standoff Voltage 5.8V
Breakdown Voltage 6.8V Max +/- 5%
Clamp Voltage 10.5V Max
Peak Pulse Current 144.8A

8 Dispenser Primary Disconnect Components & Dimensions

  1. Dispenser Control Board
  2. Disconnect Switches
  3. Control Output to Secondary Disconnect Controller
  4. Ground Connection
  5. Output Power, Controlled by Site E-Stop
TP Primary - Specs - Dims 1.psd

12 & 16 Dispenser Primary Disconnect Components & Dimensions

  1. Dispenser Control Board
  2. Disconnect Switches
  3. Control Output to Secondary Disconnect Controller
  4. Ground Connection
  5. Output Power, Controlled by Site E-Stop or Hardwire
TP Primary - Specs - Dims 2.psd

8 Dispenser Primary Disconnects

Model Number Description
DDS-8DM4GE Primary Dispenser Disconnect, 4 Conductors x 8 Dispensers (Wayne® or Gilbarco®), for dispenser data and card reader circuits
DDS-8DM4GPE Primary Dispenser Disconnect, 4 Conductors x 8 Gilbarco® Dispensers, for dispenser data and card reader circuits, with data surge protection for current loop
DDS-8DM4WPE Primary Dispenser Disconnect, 4 Conductors x 8 Wayne® Dispensers, for dispenser data and card reader circuits, with data surge protection for current loop and RS-485

12 & 16 Dispenser Primary Disconnects

Model Number Description
DDS-12DT4GE Primary Dispenser Disconnect, 4 Conductors x 12 Dispensers (Wayne® or Gilbarco®), for dispenser data and card reader circuits
DDS-12DT4GPE Primary Dispenser Disconnect, 4 Conductors x 12 Gilbarco® Dispensers, for dispenser data and card reader circuits, with data surge protection for current loop
DDS-12DT4WPE Primary Dispenser Disconnect, 4 Conductors x 12 Wayne® Dispensers, for dispenser data and card reader circuits, with data surge protection for current loop and RS-485