General I/O Terminal Block; Di/Do Diagram - Vivotek SC8131 User Manual

General I/O Terminal Block

This Network Camera provides a general I/O terminal block which is used to connect external
input / output devices. The pin definitions are described below.
DI- DI+ DO- DO+

DI/DO Diagram

1. The DO+ pin provides a 12V output voltage.
2. The max. voltage for DO- pins is 30VDC (External power).
In order to control AC devices, the following diagram can be taken in consideration. This
diagram uses a relay to control the ON/OFF condition of the AC device.
3. An external relay can be triggered by using DO+ or by an external power source, depending
on the type of relay you use.
4. In case of using an individual relay (instead of using a relay module), for protection against
voltage or current spikes, a transient voltage suppression diode must be connected in parallel
with the inductive load.
The 12V connection can be used to energize a relay coil with up to 50mA. If more than 50mA is re-
quired, an external power supply can be applied.
Dry contact with external DC power source to supply a relay. Dry contact is the safest connection
to protect devices.
DI-
DO+
DI+
DO-
PE
The maximum DO+ 12V output load is 0.5A.
Switch
Photo
Coupler
DC 0V
NC
NO
Relay
External DC power
DC
External AC power
DC 0V
with Protected Earth
AC
PE
External Device
VIVOTEK
User's Manual - 29