Twisted Pair 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
Primary Disconnects provide emergency stop and service disconnect switches for dispenser data and credit card data circuits.
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
- Dispenser Control Board
- Disconnect Switches
- Control Output to Secondary Disconnect Controller
- Ground Connection
- Output Power, Controlled by Site E-Stop
12 & 16 Dispenser Primary Disconnect Components & Dimensions
- Dispenser Control Board
- Disconnect Switches
- Control Output to Secondary Disconnect Controller
- Ground Connection
- Output Power, Controlled by Site E-Stop or Hardwire
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 |
Featured
Brochures
| Title | Type | Size | |
|---|---|---|---|
 |
FFS-0813 Primary & Secondary Dispenser Disconnect Solutions Datasheet.pdf | 3.91 MB |
Catalogs
| Title | Type | Size | |
|---|---|---|---|
 |
FFS-0834 Power Integrity Integrated Electrical Controls Catalog.pdf | 47.96 MB |
Manuals
| Title | Type | Size | |
|---|---|---|---|
 |
44-1081 DDS-12DT - Installation Instruction Rev A 7-29-16.pdf | 1.24 MB | |
 |
44-1093 DDS-8DM4GE Shunt Resistor Installation Card Rev O 6-6-16.pdf | 0.68 MB | |
 |
44-1094 DDS-12DT4xxE Shunt Resistor Installation Card Rev O 7-26-16.pdf | 0.31 MB | |
 |
IST-1081 DDS-12DT Install Guide | 4.51 MB |