Franklin Fueling Systems STP-SCIIIC, Руководство по установке

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Master-Slave/Alternating Circuit
Note: RS 485 Connection is only required if Master-Slave or Alternating Circuit operation is desired.
Note: Be sure L1, L2, L3; M1, M2, M3 and Grounds are installed at each STP-SCIIIC.
The Master-Slave feature allows the master to turn on additional STP’s when the first STP operating needs help
due to loading (flow rate) or an abnormal condition exists. The Alternating Circuit (AC) feature continuously
alternates the lead pump, thus turning on a different STP each time all dispensers are shut off and at least one
dispenser is turned back on.
1. (Fig. 2) Connect RS 485 (+, G, & –) to terminals. Connect drain wire of shielded cable to Ground (G) at
one end only. Wire per NFPA 30A and NFPA 70. For the signal wires, use 18 AWG 3 conductor cable (300V
min.), with conductors twisted and within a common jacket. Cut wires to length so that there is no excess
wire touching circuit board components.
2. (Fig. 2) Connect hook between STP-SCIIIC’s.
3. Set Master-Slave and Alternating Circuit features on (SW1) poles 1-3 per Table 2.
4. Set (SW1) poles 7-8 per “Table 1”. The address must be set for each STP-SCIIIC.
5. Attach cover of controller to base. Then go to “Calibration” section to complete installation.
WARNING
Always replace the cover of the STP-SCIIIC before applying power. Failure to do so could
result in severe injury or death.
Note:
There can only be one Master in a system and up to 3 slaves.
SW1-Pole 1 in the ON position = selected
Figure 1