Chapter 3 Expansion unit specification
expansion unit 3-28
3 How many expansion unit can be connected to base
unit
The maximal number of expansion unit than can be connected to base unit is related to the
specification about base unit and the power consumed by expansion unit
Next four will be think about.
1. The maximal points about digital I/O defined by base unit；(refer to 3.1)
2. The maximal points about analog I/O defined by base unit；(refer to 3.1)
3. The maximal power
consumption about 5V internal. (refer to 3.2.1; 3.2.2)
4. The maximal number of output that are on at the same time. . (refer to 3.2.3; 3.2.4)
3.1 Specification
Base unit
Digital I/O（base unit +
expansion unit）
Channels of AD Channels of DA
S type 80 8 2
20/30 M type 128 8 2
20/30 H type 256 8 2
40/60 H type 256 60 10
3.2 Power consumption
3.2.1 5V power provide by base unit
Base unit 5V output(mA)
S Type 160
20/30 Relay type 410
20/30 Transistor type 340
40/60 Relay type 410
40/60 Transistor type 280
3.2.2 5V power consumed by expansion unit
Expansion unit 5V current (mA)(max)
TP03-16EXD 20
TP03-16EMR 30
TP03-16EYR 40
TP03-16EMT 30
TP03-16EYT 40
TP03-8AD 30
TP03-2DA 30
Table 3.2.2
3.2.3 24V internal power provide by base unit
All base unit provide 200mA 24V internal power
Every relay output needs 5mA current of 24v internal when it’s on .
Every transistor output of expansion unit needs 5mA current of 24v internal when it’s on.
All transistor output of base unit don’t need 24V internal
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