WARNING The Siemens Building Technologies SED2 Variable Frequency Drives are shipped without EMC line filters. (The EMC filter is most commonly used in Europe.) Where local codes or customer/installation requirements dictate, separately orderable Class A line filters are available. More stringent Class B line filters are also available for most models.
Figure 1. Functional Block Diagram of Typical Electronic Bypass Option. contactors and the outputs that report operation. The SED2 Electronic Bypass Option consists of a SED2 VFD, and a bypass CONTROLLER enclosure with electronic controls SED2 VFD BOARD (Figure 2). The electronic controls...
Automatic Bypass selector switch; requires SED2 programming. Essential Services selector switch. When the switch is ON the option is enabled; when the switch is OFF the option is disabled. Figure 3. Controller Board Inputs and Outputs. Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Contactors The Controller board provides two or three relay contact circuits controlled by the Electronic Bypass Option: bypass, input, and output contactors. Each circuit includes a NO relay. Controller board connector J7 enables circuit connections. The relay circuits route power to the SED2 and the motor via the contactors.
A contact closure from this other device is wired to the Interlock Start on the Controller Board which then starts the motor and turns the Interlock Start Logic Proofed indicator on steady. This feature is also called damper end switch relay logic. Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Installation Instructions Environmental Conditions Install the Electronic Bypass Option in a heated, indoor controlled environment that is free of moisture and conductive contaminants such as condensation and dust. The air entering the unit for ventilation/cooling must be clean and free from corrosive gases.
19.9 (51) (14) Frame Size E Frame Size F NOTE: It is recommended to leave 6 inches (15 cm) around the top and sides of the unit. Figure 5. Electronic Bypass Option Dimensions in Inches (Centimeters). Siemens Building Technologies, Inc.
Control wiring is 12 to 26 AWG and tightening torque is 5 lb-in. 2. If applicable, route communications wiring (P1) in conduit through knockout and into housing (Figures 7 through 9). Continue to route communications wiring to SED2 and terminate per SED2 VFD Startup, Operation, and Maintenance Manual (125-3201).
L3 L2 L1 MOTOR OVERLOAD BYPASS CONTACTOR OUTPUT CONTACTOR CONTROLLER BOARD TRANSFORMER INPUT CONTACTOR COMMUNICATIONS (OPTIONAL) WIRING (P1) VIA 1 KNOCKOUT POWER FUSES REACTOR (OPTIONAL) (OPTIONAL) Figure 9. Routing of Power and Control Wiring for Frame Size F. Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Table 1. Wire Sizes and Tightening Torques for Electronic Bypass Option with 208V Drive. Disconnect Circuit Breaker Overload Ground Lug Switch Bypass Part Frame kW Amps Torque, Torque, Torque, Torque, Number Wire Wire...
50 - 200 14-2/0 50 (5.6) (14 - 31.1) kcmil (13.5 - 31.1) (14 - 23.7) * Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum 600 Vac. Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Table 3. Wire Sizes and Tightening Torques for Electronic Bypass System with 380V to 480V Drive. Disconnect Circuit Breaker Overload Ground Lug Switch Bypass Part Frame kW Amps Torque, Torque, Torque, Torque, Number...
50 - 200 14-2/0 50 (5.6) (14 - 31.1) kcmil (14 - 31.1) (14 - 23.7) * Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum 600 Vac. Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Startup Procedures Safety Precautions WARNING: When you connect input power to the Electronic Bypass Option, the motor terminals are energized even if the motor is not running. Do not make any connections with input power connected to the Electronic Bypass Option.
2. Press the Enable key on the Electronic Bypass Option keypad to place the unit in VFD mode. 3. Perform SED2 commissioning per the SED2 VFD Startup, Operation, and Maintenance Manual (125-3201). If using the Quick Commissioning mode, end this mode with P3900=3 to run a motor calculation without resetting the SED2 to factory defaults.
SED2 VFD Electronic Bypass Option Operating Instructions Required SED2 Parameter Settings The following SED2 parameters are programmed by the factory before shipping. If these parameters are changed or if the SED2 is ever reset to factory default, you must reset these...
The Auto Bypass feature enables the SED2 to initiate automatic bypass mode operation. Closing of the SED2 Relay sends the motor to hand bypass mode. See the SED2 VFD Startup, Operation, and Maintenance Manual (125-3201) for programming of this relay and for its desired action.
SED2 VFD Electronic Bypass Option Operating Instructions The Electronic Bypass Option will return to VFD mode operation as soon as the SED2 Relay in control opens. When the Electronic Bypass Option returns to VFD mode operation, the following occurs: •...
Command indicator turns OFF and the Proofing indicator turns ON. The motor then starts in the selected mode. • Any call for the motor not to be running requires a new proofing sequence to be initiated. NOTE: This feature can only be used with a hardwired start/stop command. Siemens Building Technologies, Inc.
Start button is selected, it should close the SED2 Relay. • P0704 in000 = 1 and P0704 in001 = 1 NOTE: For a complete description of BiCo, see the SED2 VFD Startup, Operation, and Maintenance Manual (125-3201). DIGITAL INPUTS Wiring Example for Interlock...
Essential Services does not require SED2 parameter settings. The Essential Services feature simply puts the Electronic Bypass Option into override bypass mode no matter what operation is selected. Wiring Example for Essential Services DIGITAL INPUTS Customer Essential Services Essential Services Initiation Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructions Interlock and Auto Bypass on VFD Fault Description Interlock and Auto Bypass features are both active. Auto bypass now becomes auto bypass on a VFD fault only (bypass is initiated by the SED2 Fault and this digital output must always be programmed to VFD fault).
Running on bypass • Overload fault Each relay has a maximum rating of 2A at 120V ac. Operating: 32°F to 104°F (0°C to 40°C) Temperature Storage: –40°F to 158°F (–40°C to 70°C) Humidity 0 to 95% rh, noncondensing Siemens Building Technologies...
SED2 VFD Electronic Bypass Operating Instructons Table 6. SED2 Specifications. Drive Specifications Description 200V to 240V, 3 ac ± 10%. 1/2 hp to 60 hp, (2.3 Amps to 154 Amps) Input voltage, 3 phase 380V to 480V, 3 ac ± 10% 1/2 hp to 125 hp, (1.2 Amps to 178 Amps) power, and amps 500V to 600V, 3 ac ±...
Electronic Bypass Option. If the unit fault condition still exists, replace the Controller board. CAUTION: When powering down/up the Electronic Bypass Option, power down the unit, wait 5 minutes, and then power up the unit. Siemens Building Technologies...
SED2 VFD Electronic Bypass Option Operating Instructons Override Jumper An Override Jumper (J8) is supplied BPEC BPEC on the Controller board. Moving this jumper to the override position removes the Controller board and its keypad from the control and closes the drive output contactor (and the input contactor if supplied).
Bussmann/Littlefuse LP-CC-1 Bussmann/Littlefuse LP-CC-1 1/4 VBE325… to VBE3125… Bussmann/Littlefuse LP-CC-1 1/2 Bussmann/Littlefuse LP-CC-2 VBE40… to VBE420… Bussmann/Littlefuse FNQ-R-4/10 Bussmann/Littlefuse LP-CC-6/10 VBE425… to VBE425… Bussmann/Littlefuse LP-CC-8/10 Bussmann/Littlefuse LP-CC-1 1/4 VBE430… to VBE4125… Bussmann/Littlefuse LP-CC-1 1/4 Bussmann/Littlefuse LP-CC-2 Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructons Remote Start/Stop VFD DI#3 VFD DI#2 Interlock Start Confirm Isolated 0V VFD DI#1 OK to Run Bypass Input Hand SED2 Relay Input VFD DO#2, NO On/Off Start Contactor SED2 Bypass SED2 Fault VFD DO#1, NO...
Troubleshooting Siemens Building Technologies, Inc.
SED2 VFD Electronic Bypass Option Operating Instructons Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 Tel: +1 847-215-1000 Fax +1 847-215-1093 Siemens Building Technologies, Ltd. 2 Kenview Blvd. Brampton, Ontario Canada L6T 5E4 Tel: +1 905-799-9937 www.sbt.siemens.com...