ETEL Doc.- Hardware Manual # DSC2P / Ver H / 6/1/11
DSC2P Hardware Manual
29
3.2
Inputs / outputs connector
3.2.1
Connector JC9: Customer inputs / outputs
Caution:
The inputs/outputs cable must be insulated (no contact) from the power and the mains
The inputs and outputs must be connected to an Extra Low Voltage circuit only (SELV)
The digital inputs and outputs of this connector are galvanically insulated by opto-
couplers.
The analog input is not galvanically insulated from the GND.
Caution:
This connector must be handled in an ESD protected environment, only.
Remark:
The inputs/outputs cable connected to the DSC2P must be shielded (see
§3.7.1
).
The DSC2P has 6 digital inputs (DIN1 to DIN4, DIN9 and DIN10) and 4 digital outputs (DOUT1 to DOUT4).
Every digital input and output is opto-coupled. DIN3, DIN4, DIN9 and DIN10 are opto-coupled through a
high
speed
opto-couplers (100 ns). The DSC2P has also one analog input (AIN1). The A/D converter has a 12 bits
resolution and can convert analog signals ranging b10VDC and -10VDC.
Only inputs and outputs
interface
is considered here. Refer to the corresponding
'Operation & Software
Manual'
for more information about the use of these inputs and outputs.
3.2.1.1
Analog input
To use the analog input (AIN1), a voltage ranging from +10VDC to -10VDC must be applied between pins 2
(AIN1+) and 9 (AIN1-).
Remark:
If AIN1 = +10VDC
⇒
monitoring M51 = -2048, and if AIN1 = -10VDC
⇒
monitoring M51 = +2047
3.2.1.2
Digital inputs
The digital inputs switch to ’1’ when a voltage ranging b12VDC and +28VDC is applied between pins
DIN+ of the corresponding input and GNDext.
The digital inputs switch to ‘0’ when a zero voltage is applied between pins DIN+ of the corresponding input
and GNDext.
Remark:
When using an external ‘positive limit switch’, connect it to DIN10.
When using an external ‘negative limit switch’, connect it to DIN9.
When using an external ‘home switch’, connect it to DIN2.
The auxiliary supply can be external to the controller, as shown below:
3.2.1.3
Digital outputs
To use a digital output, a voltage should previously be supplied to the external auxiliary supply (+Vext). This
voltage should range b12VDC and +28VDC. The maximum total current provided by the digital
outputs is limited to 500 mA (limited by fuse F2).
It is recommended to use an external auxiliary supply (+Vext) as shown below (in this case, the logical value
‘1’ will correspond to +Vext and ‘0’ to GNDext).
External
supply
DSC2P
DIN1 +
GNDext
6
3
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