CSM UniCAN 3, Руководство по установке

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UniCAN 3 – Installing the device
Installation Manual 11 Version 01.00 // 2018
3 6 3 Digital inputs and outputs
The connection to the digital inputs and outputs is made using a 7-pole LEMO 0B socket on the back
of the housing (see Fig. 3-1,
⑨
“Digital I/O”).
i
The additional service access connected to this socket is usually not relevant for
customers.
Digital I/O
Image Pin Signal Description
1
2
3 4
5
6
7
1 D
IN1
/D
OUT1
Digital Input/Output 1
2 D
IN2
/D
OUT2
Digital Input/Output 2
3 D
IN3
/D
OUT3
Digital Input/Output 3
4 D
IN4
/D
OUT4
Digital Input/Output 4
5 GND Signal Ground
6 — Reserved for service access
7 — Reserved for service access
Housing Shield Shield
Tab. 3-10: Pin assignment of the digital I/O interface (back view of device)
The digital inputs accept voltage levels
of over +2.5 V as a logical “1” (U
IN-High
,
“high” level) and voltage levels below
+1 V as logical “0” (U
IN-Low
, “low” level).
The input voltage may be within the
range of 0 V to 10 % above the supply
voltage of the battery (1.1 × U
Batt
). If the
input voltage is less than +3.8 V, the
impedance is 1 MΩ. Otherwise, it is
220 kΩ. The input voltage level U
IN
of
all digital inputs is determined 1,000
times per second (f
S
= 1 kHz).
A logical “1” of the digital output
(U
OUT-High
, “high” level) corresponds to
an output voltage U
OUT-High
≥ U
Batt
– 1.1 V,
with an output voltage of up to 25 mA.
With a logical “0” (U
OUT-Low
, “low”
level), the digital output is connected
with high resistance (220 kΩ with
U
OUT
> +3.8 V and 1 MΩ with U
OUT
< +3.8 V)
to the ground (GND), i.e. the voltage
characteristic of U
OUT
with a logical
“0” of the digital output is primarily
influenced by the connected consumer.
All outputs and the signal ground are
short-circuit proof (D
OUTx
to GND and GND to U
Batt
).
U
Batt
U [V]
1 V
2.5 V
1.1× U
Batt
U
Batt
U
Batt
-1.1 V
U
IN-High
U
OUT-High
U
IN-Low
0
5
3
4
2
1
1 MΩ
220 kΩ
3.8 V 3.8 V
Fig. 3-7: Voltage level and impedance of the digital inputs/outputs