Marquette Hellige GmbH
MicroSmart V 2.xx
Page 30
Servicing Instructions 227 470 35 B - 97.12
3.4.3 Interface, thermal array
Plug designation:
AA/
Socket connector
2 x 15-pin upright
(180 °)
,
Caution! No reverse voltage protection!
The function of the individual pins is shown in the following table. The definition in terms of
input/output is as seen from the PCB MicroSmart.
Signal name
I/O
Meaning
Level
Polarity
Pin No.
VH
---
+24V
+24V
---
1
VH
---
+24V
+24V
---
2
GND
---
+24V
0V
---
3
VH
---
Ground
+24V
---
4
GND
---
Ground
0V
---
5
GND
---
Ground
0V
6
DATA IN 1
I
Data input 1
TTL
---
7
DATA OUT 1
O
Data input 1
TTL
---
8
DATA IN 1
I
Data input 2
TTL
---
9
DATA OUT 2
O
Data output 2
TTL
---
10
STROBE 1
I
Strobe 1
TTL
active high
11
STROBE 2
I
Strobe 2
TTL
active high
12
THERMISTOR 1
---
NTC resistor
---
---
13
LATCH
I
Array latch
TTL
active high
14
VDD
Logic Supply
+5V
---
15
NC
---
---
---
---
16
THERMISTOR 2
---
NTC resistor
---
---
17
CLOCK
I
Array clock
TTL
L->H
18
STROBE 3
I
Strobe 3
TTL
active high
19
