Digital I/O - Rice Lake REVOLUTION Tracer AV Installation Manual

There are two socketed DB-9 connectors for remote displays which are connected to the serial port J4. The
remote display's DC power and communications are run in the same three-conductor cable. The serial port data
is transmitted on the 20 mA pins to the remote displays.
2.3.4

Digital I/O

Digital inputs can be set to provide several indicator functions, including all keypad functions. In the
these inputs are set to
Zero
and can be driven by TTL or 5V logic without additional hardware. LEDs on the CPU board light when digital
inputs are active.
Digital outputs are typically used to control relays that drive other equipment. In the
will cause the display to flash. Outputs are designed to sink not source, switching current. Each output is a
normally open connector circuit, capable of sinking 250 mA when active. Digital outputs are wired to switch
relays when the digital output is active (low, 0 VDC) with reference to 5 VDC supply. LEDs on the CPU board
light when the digital outputs are active.
8 Tracer AV Installation Manual
DB-9 EDP Port
COMM J3
Pin 2 1
Pin 3 2
Pin 5 3
Table 2-2. EDP Port/COM
DB-9 Serial Port Digital Output
Remote J4
n/a
n/a 4
n/a 5
Pin 1
Pin 2
Pin 9
Table 2-3. Serial Port/Remote Display
and for the remote keypad. The inputs are active (on) with low voltage (0 VDC)
Units
Digital Input
DB-9 J2
Pin 4
Pin 5 3
Pin 8 1
Pin 9 2
Table 2-4. Digital Input/Remote Keypad
Port Connector
Digital J6
Output
Table 2-5. J6 Digital Outputs
Function Pad
EDP TxD P 1
EDP RxD P 2
EDP Gnd P 3
J6 Function
4 +5 VDC
20 mA+
20 mA-
+7.5 VDC
Gnd
TxD
J12 Function Pad Number
1 Setup P 10
Gnd P 7
Dig In 1 P 9
Dig In 2 P 8
Pin Function
1 Gnd
2 DO 1
3 DO 2
4 +5V
Pad
P 4
P 5
P 6
n/a
n/a
n/a
Tracer AV
Tracer AV , the setpoint value
,