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Chapter 4
Description of Operation
Contactor
M
M
M
M
TB4–11
Contactor Coil
Circuit Breaker
(MCB)
TB5–4
TB5–5
TB5–6
TB4–19
Isolation
TB4–21
Transformer
(MPT)
36V AC
1–Phase
User Supplied
Branch Circuit
Protection &
Disconnect
AC Line Input
4-8
Figure 4.4
1391-DES Block Diagram
Rectifier D1
TB4–12
Regulator
Power Driver Board
Protection
Control
Circuitry
Logic
Digital Control Boards
TB2–1
TB2–4
TB2–6
TB2–9
TB2–2
TB2–5
TB2–7
TB2–10
TB2–3
Velocity
Current
Command
Output
Velocity
Enable
Output
External Shunt
Regulator
Resistor
R1
C1
Shunt
Regulator
Transistor
Shunt
Transistor
Base Drive
Suppy
LEDs
Status
Enable
TB2–11
TB2–13
TB2–15
TB3–1
TB2–12
TB2–14
TB2–16
through
TB3–10
Reset
Torque
Command
Input
Adjustable
Encoder
Current
Output
Limit
Power Transistor
Output Modules
Logic
Power Fault
Protection
Isolated
Current
Sense
Board
TB1–1
through
TB1–10
TB4–17
TB4–18
DROK
Contact
TB5–1
TB5–2
TB5–3
1326A AC
Servomotor
Brushless
Resolver
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