Laser Extension Connector; 8-Bit Digital Output Port; Laser Signals - Scanlab RTC 4 Installation And Operation Manual

6.2 Laser Extension Connector

The 26-pin connector LASER EXTENSION on the
®
RTC 4 board provides a buffered 8-bit digital output
port (L0 to L7). The pins (15) and (17) must be
configured with jumpers. For details please refer to
the section "Digital Output Port
(Laser Extension Connector)", page
(LSB) L0 (1)
L1 (3)
L2 (5)
L3 (7)
L4 (9)
L5 (11)
L6 (13)
+5 V / L7 / GND* (15)
+5 V / L7 / GND* (17)
LASER2 (19)
(20) ← (21)
GND (23)
+5 V (25)
Pin out of the LASER EXTENSION connector
* depends on jumper settings
®
RTC 4 PC Interface Board
Rev. 1.3 e
6 Electrical Connections

8-Bit Digital Output Port

The buffered 8-bit digital output port (TTL level) is
intended for YAG lasers with a digital lamp current
control. However, it can be used for any other
purpose as well.
The commands
60. write_8bit_port_list (see page 122)
the digital output port with an 8-bit value. The
output is in high-impedance mode (tri-state) until an
initial value is assigned to it.
The most significant bit (MSB) (L7) of the output
(2) GND
value can be used for other purposes, e.g. for
(4) NOT CONNECTED
controlling a shutter. To do this, the MSB can be
assigned to an extra pin on the LASER EXTENSION
(6) +5 V
connector (see
(8) NOT CONNECTED
(10) NOT CONNECTED

Laser Signals

(12) NOT CONNECTED
(14) NOT CONNECTED
Like the laser signals of the laser connector, the
(16) NOT CONNECTED
output signals LASER1 and LASER2 depend on the
(18) +5 V
selected laser control mode (see
(20) → (21)
page
(22) LASER1
(24) NOT CONNECTED
(26) NOT CONNECTED
24
write_8bit_port
page 60).
52).
and
load
"Laser Signals",
53