Operating Instructions
Zero-3 / 5-Channel Motor Controller
CNC-STEP e.K. ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 18
Support: +49 (0)2831/91021-50
12.10.2012
4 .3 . 5
LPT ports
The connection with the controller PC is by means of a 25-pin D-sub connector (LPT = parallel
port) on the rear panel. Most signals for basic functions (phase/direction, spindle on/off, etc.) are
available on the left connector. The plug-in connector on the controller is male, i.e. to connect it
with the PC a 1:1 extension cable with a male/female plug is required.
The pins ( LPT1) are assigned as follows:
Pin no.
description
Pin no.
description
1
Relay 1 (spindle)
14
Relay 2 (cooling/suction)
2
Direction X1 and X2
15
Ref. switch 4. Axis or tool
probe
3
Cycle X1 and X2
16
Watchdog (toggle/charge
pump)
4
Direction Y
17
Spindle speed PWM
5
Cycle Y
18
Signal ground
6
Direction Z
19
7
Cycle Z
20
8
Direction 4th axis (C)
21
9
Cycle 5th axis
22
10
Reference switch Z
23
11
E-Stop (low active)
24
12
Reference switch Y
25
13
Reference switches X1 and
X2
