Controlling Several 3Pcis In Parallel With One Controller; Chapter 3: Operation; Figure 3-5. On/Off Control With Output Disabled By Contact Closure; Figure 3-6. Controlling Several 3Pcis Connected In Parallel - Siemens POWER CONTROL Series Operation Manual

Operation

Figure 3-5. On/Off Control with Output Disabled by Contact Closure

Calibrate the system as outlined in Section 3.3: Temperature Controller on page 3-2. Note that zero power
demand is accomplished by closing the contacts with the controller, and maximum power demand is present
when the contacts are open.

3.7. Controlling Several 3PCIs in Parallel with One Controller

Multiple control of parallel connected 3PCIs with a single controller is outlined below.
1. Connect each unit as shown in Figure 3-6. Refer to Section 3.3: Temperature Controller on page 3-2.
2. Remove the external shunt resistor
3. Connect the remaining units in parallel as shown in Figure 3-6.
4. Connect the appropriate impedance matching resistor (RC) for your controller across the output
terminals of the controller as shown in Figure 3-6. This will assure proper operation of all controllers.
RC is usually 250Ω or 500Ω.
5. Calibrate the system as outlined in Section 3.3: Temperature Controller on page 3-2.
Controller

Figure 3-6. Controlling Several 3PCIs Connected in Parallel

3-4
3PCI SCR Power Controller Series Manual
Controller
K
on all of the units.
R101
TB1 TB1
1 1
RC
2 2
Unit 1 Unit 2
∇ ∇ ∇
s
TB1
3 (Shutdown)
4 (Common)
TB1 TB1
1 1 1
2 2 2
Unit 3 Unit 4 Unit n
Version 1.2 (19000325)
TB1