General specifications:
Number of encoder inputs
2
Terminal block
X55 and X56
Terminal number
5, 6, 7, 8, 9, 10, 11, 12
Input impedance
120
Ω
Maximum voltage on
inputs
5V DC
Cable type
Screened cable with a twisted pair
of wires for each encoder channel
1
Table 6.6 Encoder Inputs
Incremental encoder type
RS422/TTL
Maximum frequency
410kHz
Phase displacement between A and B
90°± 30°
Maximum cable length
300m
2
Table 6.7 Incremental Encoder Specifications
Absolute encoder type
SSI
Data coding
Gray
Data length
12 – 32 bit
Clock frequency
78kHz – 2MHz
1
Maximum cable length
150m
2
Table 6.8 Absolute Encoder Specifications
1) Always observe specifications/limitations prescribed by
the encoder supplier.
2) 150m cable is possible up to 500kHz clock frequency,
above 500kHz cable length must be limited further.
Number of encoder outputs
1
Terminal block
X56
Terminal number
5, 6, 7, 8, 9, 10, 11, 12
Signal type
RS422
Maximum frequency
410kHz
Maximum number of slaves
31 (more with repeater)
Maximum cable length
400m
Table 6.9 Encoder Output
Number of supply voltages
3
Terminal block
X55 and X56
Terminal number
1, 2, 3, 4
24V, max. load
250mA
1
8V, max. load
250mA
12
5V, max. load
400mA
1
Table 6.10 Encoder Voltage Supply
1) This is maximum load when only one supply voltage is
used; when 2 or 3 supply voltages are used simultaneously
the load must be reduced accordingly. The following must
be observed: l load5V 6W and
load5V 2W.
2) 8V is only available at terminal block X55.
Sample time of position PID loop 1ms
Positioning accuracy
±
1 increment
¹
Synchronizing accuracy
±
1 increment
¹
Table 6.11 Control Characteristics
1) This is the static accuracy; dynamic accuracy depends on
many “external” factors such as encoder resolution,
moment of inertia, mechanical backlash and elasticity.
Program memory size
100 Kbytes
Maximum number of application programs
90
Average command execution time
0.3ms
Maximum reaction time on interrupt input
ms
Table 6.12 Application Program
6.3 Supply Voltage Overview
General Specifications
MCO 305 Operating Instructions
MG.33.K3.02 - VLT
®
is a registered Danfoss trademark
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