technical reference
76
SYNRAD OEM v40 Operator’s Manual Version 4
DB-9 connections
(SAB models only)
Pin Function Description
5 + 24 VDC Fan Power
This output provides +24 VDC for driving a customer-supplied cooling fan. The +24 VDC
Fan Power output (Pin 5) can source up to 0.75 A max. This pin is not protected or fused;
the control board will be damaged if this pin is inadvertently shorted. The return (ground)
path must be through Pin 3, DC Power Ground.
6 No Connection
7 No Connection
8 Shutter Switch
In Keyswitch models, this input connects to the physical Shutter Switch. Leave this input
open to enable lasing. Grounding this pin indicates that the shutter is Closed, which
disables lasing. If connecting an external shutter switch to Pin 8, the circuit path must be
grounded to Pin 3, DC Power Ground. There is a ve-second delay imposed from the time
the shutter input is opened to the time that PWM Command signals are accepted.
9 + 5 VDC Auxiliary Power
This output provides +5 VDC for driving external inputs or outputs. The +5 VDC Auxiliary
Power output (Pin 9) can source up to 0.5 A max. This pin is not protected or fused; the
control board will be damaged if this pin is inadvertently shorted. The return (ground) path
must be through Pin 3, DC Power Ground.
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