HEIDENHAIN ND 231 B v.2 - Manual (Page 40)

40
Measured value output after signal through the “Contact”
or “Pulse” inputs
To start measured value output through the EXT interface
(X41) you can either:
ä Close the “Contact” input (pin 23 on X41) against 0 V,
for example with a simple switch (make contact);
or
ä Close the “Pulse” input (pin 22 on X41) against 0 V,
for example by triggering the input with a TTL logic
device (such as SN74LSxx).
Characteristic times for measured value output
Process Time
Minimum duration of “Contact” signal t
e
³ 7 ms
Minimum duration of “Pulse” signal t
e
³ 1.5 µs
Storage delay after “Contact” t
1
£ 5 ms
Storage delay after “Pulse” t
1
£ 1 µs
Measured value output after t
2
£ 57 ms
Regeneration time t
3
³ 0
Duration of measured value transfer
t
D
= [s]
Triggering the “Contact” and “Pulse” inputs at D-sub
connection EXT (X41)
Signal transit times for measured value output after “Pulse”
or “Contact”
Pin 1(0V)
Pin 23
Pin 22
Pin 1(0V)
EXT(X41)
EXT(X41)
t
1
t
2
t
e
t
e
t
D
t
3
187 + (11 • number of blank lines)
RS-232-C/V.24 Data Interface (X31)
baud rate