American Dynamics AD1202, Installation And Operating Instructions Manual

Page: 9 / 32

EXTERNAL Connector
A 24-pin connector on the rear panel, labeled EXTERNAL,
provides pins for external alarm inputs and control signals. A
mating 24-pin plug-in connector with flying leads is provided.
EXTERNAL Connector Pinouts
Pin Function Pin Function
1 Channel SEL 1 13 Alarm Input 3
2 Channel SEL 2 14 Alarm Input 4
3 Channel SEL 3 15 Alarm Out
4 Channel SEL 4 16 Ground
5 Code Black (1) 17 BIN IN bit 0
6 Code White (1) 18 BIN IN bit 1
7 Code Shield (1) 19 BIN IN bit 2
8 Code Black (2) 20 BIN IN bit 3
9 Code White (2) 21 External Unit
10 Code Shield (2) 22 Ground
11 Alarm Input 1 23 Code Select
12 Alarm Input 2 24 Ground
From the rear of the AD1202, pin 1 is the bottom-right, pin 2 is
the top-right, and pin 24 is the top-left of the connector.
ALARM INPUTS
The EXTERNAL connector provides four Alarm Input pins
(pins 11 - 14) for external alarm contacts, one for each
camera input. The Alarm Input number refers to the
associated camera input number. The AD1202 responds to
normally open (NO) contact closures from external alarm
devices (see page 9 for Alarm Response).
1. Connect the external alarm contact signal line to the
appropriate Alarm Input (pin 11 - 14).
2. Connect the remaining side of each alarm contact to
Ground (pin 16, 22, or 24).
Alarm contact closures to ground must have a resistance of
500 ohms or less; alarm opens must have a resistance of
100,000 ohms or more.
Note: If alarm contacts are installed and the AD1202 is
connected to a switcher, connect each alarm contact
in parallel to both the switcher and the AD1202
alarm inputs. See page C-5 for an illustration of
alarm connections to both the AD1202 and a
switcher.
ALARM OUTPUT
The AD1202 provides an open collector output pulse on pin
15, Alarm Out, when an alarm input is received. The pulse
is held active until the alarm input clears, with a minimum of
five seconds duration. This pulse can be used to activate an
external device such as a VCR.
1. Connect Alarm Out (pin 15) to the external device.
2. Connect the remaining side of the device control signal
to Ground (pin 16, 22, or 24).
CAMERA ADDRESS INPUT
The binary input, BIN IN (pins 17 - 20), accepts a binary
camera number input from an MCS-compatible AD
switcher. These pins allow the AD1202 to operate as a
controller follower, permitting external selection of a camera
by the connected switcher (see Camera Selection, page 6).
Connect the camera binary address pins from the switcher to
the AD1202 BIN IN pins.
1. Connect the switcher camera address bit 0 to the BIN IN
bit 0 (pin 17).
2. Connect the switcher camera address bit 1 to the BIN IN
bit 1 (pin 18).
3. Connect the switcher camera address bit 2 to the BIN
IN bit 2 (pin 19).
4. Connect the switcher camera address bit 3 to the BIN
IN bit 3 (pin 20).
5. Connect a ground pin from the switcher to Ground (pin
16, 22, or 24).
CHANNEL SELECT OUTPUTS
The Channel SEL pins (pins 1 - 4) provide individual logic
level outputs for each camera channel. Each Channel SEL
pin is active (logic high) when the respective camera channel
is selected (see Camera Selection, page 6). These signals
can be used to control an external device.
1. Connect the applicable Channel SEL output (pin 1 - 4)
to the device desired.
2. Connect the remaining side of the device control signal
to Ground (pin 16, 22, or 24).
AD1202 CONNECTIONS
3
Use NEC Class 2 wiring only for all EXTERNAL
connector pin connections. The wiring should also
conform to all local codes.
!
Note
If any address bit inputs are not provided, connect
those AD1202 pins to Ground (pin 16,22, or 24).