DR-switch
User Guide AP4493
4
Using the Logic Outputs
System Block Diagram and Specification
+10V
G
20 19 18 17
G
21
22
23
24
V
+ -
G
13
+ -
14
+
-
15
+
-
16
GROUND
OUT
IN
DR-LINK
DC REFERENCE
VOLTAGE
INTERNAL POWER
9-16
1-8
9-12
5-8
1-4
+10V
2K2
CONTROL
CHAIN
OPTO-ISOLATED SWITCH INPUTS 1-24
OPTO-ISOLATED LOGIC OUTPUTS 1-16
OPEN COLLECTOR
Connectors:
Pluggable Phoenix 10way terminal
Switch Inputs:
Opto-isolated via 2k2 from +10V
Switch closure connects pin to ground (5mA)
Switch cable resistance up to 1k ohm
Logic Outputs:
Opto-isolated open-collector
Floating collector (+) and emitter (-) pins
Internal 10V DC source (500mA total max)
External DC source (+24V 200mA each max)
Communication:
DR-link serial port using RJ45 connectors
Uses Allen & Heath DR-link protocol
2m CAT5 STP cable supplied, maximum 300m
Requires adapter card fitted to DR SysNet port
Daisy chain up to 3 units
Configuration:
Configure with WinDR operating software
Requires V2.11 or greater
Separately configure switches and output
Latched, press, release, time of day action
System:
DR128 8 switch
DR66
12 switch, 4 logic
DR-switch adds 24 switch, 16 logic
Power Supply:
Universal mains input 100-240V.AC
Independent 10V supply for connections
500mA total available
Dimensions:
Rack 482.5 x 143 x 44 mm (1U)
Desk 442.5 x 141 x 48 mm
The output is opto-coupled to isolate the
DR-
switch
from the connected equipment. It
provides an open collector output with floating
collector (+pin) and emitter (-pin).
Each 10way connector provides 4 open
collector pairs as well as an in10V DC
supply and ground pins. Do not use the
chassis ground screw which is for cable
shielding and safety earthing only.
The output may be used in many ways to
satisfy a wide range of interfacing applications.
It is important that the installer has a good
working knowledge of open collector and
interfacing circuits. Incorrect application may
result in damage to these outputs.
The in10V supply may be used as the
power source for low current applications such
as turning on LEDs, lamps and small relays.
One cable can feed the common supply or
ground to a bank of outputs.
Maximum current drawn from the
+10V supply for all outputs combined must not
exceed 500mA. Care must be taken in
component choice to ensure each operates
within its specified capability.
For higher current or voltage applications an
external DC power supply may be used. This
also provides total isolation between the
DR-
switch
and external equipment.
Maximum external supply voltage
must not 24V DC. Maximum current
sink through any open collector output must
not exceed 200mA.
A few examples are shown in the diagram
here. For further advice contact Allen & Heath
technical support.
V
+ -
G
+ - +
2
1
LED INDICATORS
+10V DC
SUITABLE RESISTORS
+ -
3
V
+ -
G
+ - +
6
5
+ -
7
+ -
4
+ -
8
V
+ -
G
+ - +
10
9
+ -
11
+ -
12
V
+ -
G
+ - +
14
13
+ -
15
+ -
16
+10V
OPEN COLLECTOR
OPTO
INTERNAL DR-switch CIRCUIT
(1 OF 4 SHOWN)
LOW CURRENT 12V BULBS
LOW VOLTAGE RELAY
+
-
TO EQUIPMENT
SUITABLE RESISTOR
+10V DC
+10V DC
V
-
G
+
V
-
G
+
-
+
V
-
G
+
CURRENT SINK
+V (+24V DC max)
GROUND
EXTERNAL POWER SUPPLY
DEVICE
200mA max
