102
en | 4-Reader Boards and 8 Input/8 Output Boards
Access Easy Controller
Ver 2.0.0 | 2006.07
Hardware Manual
Bosch Security Systems
15.3.1
Output Connectors
Four six-pin terminal strips provide connection points for connection of external devices that
will be controlled by the Access Easy Controller. The terminal strips are labelled on the circuit
card as T2, T3, T4 and T5. The output terminals are Form-C type dry contacts from relays
located on the 8-Input/Output card board. For each relay, Normally Closed (N/C), Normally
Open (N/O) and a common terminal (COM) are provided.
The relay contacts can be directly connected to many low voltages DC powered devices,
including alarm bells, security lights, horns, etc. when using the outputs to control high volt-
age devices, such as lighting circuits, electric door controller s, gate motors, etc., an external
interface relay must always be used. Also, use an external relay when interfacing with AC-
power devices.
In all instances where the output relay is used to operate an inductive load, such as when
interfacing with an external relay, or powering the coil of an alarm bell, a back-biased diode
should be wired across the coil of the driven device. This will protect the electronic circuitry
on the 8-Input/Output card board by providing suppression from back-emf when the devices
are de-activated.
Each output relay on the 8-Input/Output card board also has an LED associated with it that
lights whenever the relay is activated.
Beginning from the top of the 8-Input/Output card board. T2 provides connection points for
outputs 1 and 2. T3 provides connection points for outputs 3 and 4. T4 provides connection
points for outputs 5 and 6. T5 provides connection points for outputs 7 and 8. the pin config-
uration for each output connector is shown in the following chart.
i
NOTICE!
The contacts of all relays are rated at DC 24V/1A maximum
Connector T2 (top connector)
Pin#
Function
1
Output #1 (common)
2
Output #1 (normally closed)
3
Output #1 (normally open)
4
Output #2 (common)
5
Output #2 (normally closed)
6
Output #2 (normally open)
