HEIDENHAIN ND 200 - Manual (Page 21)

ND 200 Installation Instructions
en
23
Pin Function
23 I Contact: Measured value output,
see Figure 1 in "L" in the Appendix
24 I Ignore reference mark signals (X2, optional)
25 I Enable or disable REF mode (current REF status is
changed)
For pin layout, see "L" in the Appendix.
Switching inputs for measured value output
See Figure 1 in "L" in the Appendix.
The respective switching input is active when a Low signal
U
L
is applied (contact or pulse to 0 V).
Input signals:
Signal
Value
Internal
pull-up resistor
1 k Ω, active Low
Activation Trigger by making contact against
0 V or by low-level signal over TTL
logic device
Delay time for
preset/reset
t
V
≤ 2 ms
Minimum pulse du-
ration for all signals
(except for pin 22
and pin 23)
t
min
≥ 30 ms
For signal level of inputs, see "Specifications", page 24.
Open-collector outputs
See Figure 2 in "L" in the Appendix.
The unit features open-collector outputs that switch to 0 V
(= active Low).
Output signals:
Signal
Value
Open-collector out-
puts
Active Low
Delay until signal out-
put
t
V
≤ 20 ms
Signal duration of ze-
ro crossover, trigger
limit A1, A2
t
0
≤ 180 ms
For signal level of outputs, see "Specifications", page 24.
4.7 Only ND 287: Installing optional
expansion modules
For information on the location of the slots, see "Rear
panel", page 20.
Installing expansion modules
See "D" on the front fold-out page.
1
2 Ethernet expansion module
Analog module or encoder module
Switch the unit off and disengage the power plug.
Loosen the Torx screws of the selected input.
Remove the cover from the slot, or remove any module
that might be inserted.
Insert the new input assembly.
Re-tighten the Torx screws:
Tightening torque 1.5 Nm.
Connecting connectors
Connect the connector tightly to the respective
connection on the rear panel.
X1, X2: If the connectors include mounting screws, do
not overtighten them.
X26(X27): Insert the terminal of the RJ-45 connector so
that it engages.
Pin layouts
X1, X2: For connection of analog module, see "M" in the
Appendix.
X1, X2: For connection of the 11 µA
PP
/1 V
PP
/EnDat 2.1
module, see "H" in the Appendix.
X26(X27): For connection of the Ethernet module, see
"K" in the Appendix.
Vacant pins or wires must not be used.