Siemens LMV5 Quick Start Manual page 36
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Also See for LMV5:
- Technical instructions (374 pages) ,
- Basic documentation (278 pages) ,
- Manual (39 pages)
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CANBus (Continued)
The shield of the CANBus cable must be connected on each cable segment (between LMV5
and actuators, PLL52 Module) so that the entire shield has continuity with terminal X51.1 which
is the shield connection on the LMV5. This is achieved by clamping the shield on both cable
segments with the metal clamps provided on the cable entry of each actuator. Clamps for the
CANBus shield are also provided on the PLL52 module.
The current provided by one AGG5.210 transformer is usually sufficient to meet the demands of
the LMV5 base unit, AZL5 and actuators on a typical burner/boiler without a PLL52 module.
However, situations occur when one AGG5.210 is not sufficient, and a second transformer must
be used. The figure below outlines the number of transformers that should be used for different
situations.
Number and type of
actuators wired on the
CANBus
moving concurrently.
2 SQM45
3 SQM45
0 SQM48
4 SQM45
5 SQM45
1 SQM45
2 SQM45
1 SQM48
3 SQM45
4 SQM45
1 SQM45
2 SQM45
2 SQM48
3 SQM45
1 SQM45
3 SQM48
2 SQM45
1 SQM45
4 SQM48
2 SQM48
3 SQM48
0 SQM45
4 SQM48
5 SQM48
Notes :
When two transformers are used the loading should be divided between the two
transformers as equally as possible.
The 2nd transformer should be placed as close as possible to the actuators / PLL52
module that it powers due voltage drop considerations.
When adding a PLL52 module subtract 20 ft from the total length read from the chart.
Absolute maximum cable length is 300ft. (CANBus communication limitation)
LMV5 QSG Rev 4
Figure 3-1.4 CANBus Loading
Permissible Total CANBus Cable Length including AZL5 (Feet).
Actuators at 100% rated
torque.
115
85
70
2nd Transformer Req.
85
70
2nd Transformer Req.
2nd Transformer Req.
2nd Transformer Req.
2nd & 3rd Transformer Req.
58
2nd Transformer Req.
2nd & 3rd Transformer Req.
Sec 3
Pg 4
Single Transformer
Actuators at 80% rated torque.
2nd Transformer Req.
2nd Transformer Req.
2nd Transformer Req.
2nd Transformer Req.
2nd Transformer Req.
2nd Transformer Req.
2nd & 3rd Transformer Req.
www.scccombustion.com
125
95
80
95
80
30
30
70
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