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Installation
Control I/O Connections
The CSP can interface with external control hardware via the eight
control inputs and one control output.
Control Inputs
You can connect the control inputs to external hardware such
as switches to control push-to-talk (PTT) paging. Use the CSP
configuration utility to easily assign how the paging functions work.
Using Switches
You can use toggle switches or push-buttons with control inputs. Each
input terminal is tied to an internal two-kiloohm pull-up resistor so that
external switches can be wired directly from input to ground.
Control Output
Note: The control output is intended for use with ControlSpace
Remote only.
Current Source Devices
The control output can power some devices such as LEDs and low-
current relays directly. The maximum source current is 10 milliamps.
Source Limits: Open circuit, ≤ 8 VDC; 2.5 VDC and 10 mA (maximum)
for external devices.
Current Sink Devices
Devices that require more current than is available from a current-
source configuration can use the control output to sink up to 100
milliamps when used with external power supplies. Use proper
precautions when driving inductive loads.
Sink Limits: 100 mA (maximum). External supplies must be ≤ 24 VDC.
16 • English
BoseProfessional.com
Example: Control input connections
for switches
Example: Control output connections
for a current source
Example: Control output connections
for a current sink
CSP-428/1248 • Installation Guide
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