1 | Overview
The B820 SDI2 Inovonics Interface Module allows a control panel to interface with an Inovonics EN4200 EchoStream Serial Receiver through the SDI2 bus.
12
PWR |
A |
B |
COM |
6
RX 5 
TX
4
3
Figure 1.1: Module overview
Callout ― Description
1 ― SDI2 Terminal strip (to control panel)
2 ― Serial data port (to Inovonics receiver)
3 ― Address switch
4 ― Heartbeat LED (blue)
5 ― TX (transmit) LED (green)
6 ― RX (receive) LED (green)
2 | SDI2 address settings
The address switch determines the address for the B820 module. The control panel uses the address for communications. Use a slotted screwdriver to set the address switch.
Set the address for the module to 1 prior to installing it in the EN4200 housing. Figure 2.1 shows the address switches setting for address 1.
Figure 2.1: Address switch
NOTICE!
The module reads the address switch setting only during power up. If you change the switch after you apply power to the module, you must cycle the power to
the module in order for the new setting to be enabled.
3 | Installation
After you set the address switch for the proper address, install the module in the EN4200 housing, and then wire the module to the control panel.
CAUTION!
Remove all power (AC and battery) before making any connections. Failure to do so might result in personal injury and/or equipment damage.
3.1 | Install the B820 into the EN4200 housing
Installing the module into the housing:
1.Use a slotted screwdriver to press the housing release tab and separate the housing. Refer to Figure 3.1.
2.Remove the backing from the Velcro piece found in the product packaging to reveal the Velcro adhesive.
3.Place the Velcro’s adhesive side onto the back of the module.
4.Remove the remaining backing to use to secure the module in the housing.
5.Insert the B820 module into the EN4200 housing, connecting the B820’s serial data port to the EN4200’s serial data port. Refer to Figure 3.2.
6.Gently apply pressure to the B820 module to snap it into the housing clips and to apply the Velcro adhesive to the housing.
Figure 3.1: Opening the EN4200 housing
1 |
2 |
3 |
Figure 3.2: Installing the B820 in the EN4200 housing
Callout ― Description
1 ― Housing clips to secure the module
2 ― B820 serial data port
3 ― EN4200 serial data port
3.2 | Wire the B820 to the control panel
When you wire a B820 to a control panel, use the control panel SDI2 terminals labeled R, Y, G, B (PWR, A, B, COM). Connect them to the module terminals labeled PWR, A, B, COM. Refer to Figure 3.3.
Figure 3.3: Wiring to the control panel (GV4 Series control panel shown)
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