User’s Manual
29
4.2.3.1.
W
IRING FOR
M
ASTER
/
S
LAVE
O
PERATION
The control signal for parallel systems should be wired in a “daisy chain”
configuration, with all (+) signals connected and (-) signals connected.
Use twisted/shielded pair cable for interconnection. See Section 4.2.2.1
for additional information.
Do not exceed 15 feet of total cable length to connect the Master
pulse to the farthest Slave module.
Excessive distance can lead to unacceptable noise in the signal lines, and
can cause false triggering, poor operation, or catastrophic system failure.
4.2.3.2.
C
ONTROL
S
IGNALS
Terminals TB2-7&8 control the mode selection of the individual modules.
Master mode is selected by closing a contact across these terminals. If
the EIP / PDP option is utilized, the selection may be made via the
EtherNet or PROFIBUS connection.
All modules have two status outputs, Control Ready and Power Stage
Ready. The Control Ready indicates that th
e module’s bus regulation
circuitry is functioning. The Power Stage Ready indicates that the
modules power switching circuitry is functioning properly.
If a module is selected as Master, and the Power Stage is not ready, that
module will continue to control slave modules as long as it is enabled and
the Control Ready signal is active on the Master modules. The Master
module with the power stage not ready will not switch its own power stage.
This allows the braking system to operate at reduced capacity in the event
of a Master module power stage failure.
If a module is selected as Master and the Control Ready status is open,
the bus regulation circuitry is not active, and no bus regulation will occur.
For modules selected as Slaves, both the Control Ready and Power
Stage ready signals must be active for that module to switch and regulate
the DC bus. The operation of other modules is not affected.
The Master/Slave Status contact indicates the operation mode of a
module.
4.2.3.2.1.
S
TATIC
M
ASTER
For systems that have a static Master module, place a jumper
between terminals TB2-7&8. Leave terminals TB2-7&8 open on all
other modules.
4.2.3.2.2.
D
YNAMIC
M
ASTER
For large systems that require more flexibility or redundancy, the
mode can be switched remotely. This changes the direction of the
bi-directional port from input to output. Each module has its own bus
regulation logic, but modules selected as Slaves will follow the signal
on the Control Signal port.
WARNING!
AT NO TIME should more than one Master be selected simultaneously.
This can lead to double pulsing, poor operation, catastrophic system failure
and possible damage to the system. Ensure that the switching control logic
keeps more than one module from being selected at once.
Summary of Contents for M3452
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Page 19: ...User s Manual 19 Figure 3 2 Customer Connections in K9 Chassis CUSTOMER I 0 CONNECTION ...
Page 21: ...User s Manual 21 Figure 3 2 Customer Connections in M14 Chassis CUSTOMER I O CONNECTION ...
Page 24: ...M3452 vR7 EIP PDP 24 Figure 3 6 I O Hookup with R7 EIP PDP Communication ...
Page 26: ...M3452 vR7 EIP PDP 26 Figure 3 8 24VDC Power Connection ...
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Page 66: ...M3452 vR7 EIP PDP 66 Figure 6 3 M3452 K9 Chassis Dimensional Outline Drawing ...
Page 68: ...M3452 vR7 EIP PDP 68 Figure 6 5 M3452 M14 Chassis Dimensional Outline Drawing ...
Page 75: ...User s Manual 75 NOTES ...
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