Dx4020 Ethernet/Serial Status Leds; Dx4020 Supervision; Door Access Control Module (Dacm); Dacm Overview - Bosch DS7200V2-UK Installer's Manual

21.6

DX4020 Ethernet/Serial Status LEDs

The DX4020 has four Ethernet/serial status LEDs.
Ethernet/Serial
Status LEDs

Figure 53: DX4020 Ethernet/Serial Status LEDs

LED Color
BUS-XMIT Red
BUS-RCV Red
SER-RX Green
SER-TX Green

Table 16: DX4020 Ethernet/Serial Status LED Functions

21.7

DX4020 Supervision

The control panel supervises proper communication
to the DX4020 when it is used for network
communication. If it fails to communicate with the
DX4020, the control panel sends a "Dbus Missing"
{125} report, or a "Dbus Missing Alarm" {187} report.
DS7200V2-UK Installer's Guide
Disabled
Enabled
LED Enable Pins (P2)
Function
Flashes when the data bus
sends a message.
Flashes when the data bus
receives a message.
Flashes every time a message
is received from the Ethernet
port.
Flashes every time a message
is sent to the Ethernet port.
Copyright  2007 Bosch Security Systems, Inc.
22.0

Door Access Control Module (DACM)

22.1

DACM Overview

The control panel supports up to 8 DACMs.
However, each DACM added to the system
replaces one keypad. If 8 DACMs are added,
you cannot add a keypad. For full system
control, make sure at least one text keypad is
included in the system.
See DACM Configuration on page 116 for
programming instructions.
The DACM grants or restricts access to a door using
a keypad/credential reader, a Request to Exit (REX)
input, and/or a door contact. Each DACM supervises
one door.
The DACM's door contact input reports the door's
status to the control panel depending on the DACM's
programming. When the door is closed, the door
contact reports as normal. When the door is opened,
the door contact reports as faulted or shorted.
For complete installation, programming,
addressing, and operation instructions, see
the documentation supplied with the DACM.
22.2

DACM Wiring

Distance from the control panel is determined by the
total combined wire length of all devices (including
keypads) connected to the control panel's data bus
terminals.
Power
Source
DACM to Control
Control Panel
Panel
External
Power
Supply

Table 17: DACM Wire Lengths

See Figure 54 and Figure 55 for acceptable power
wiring connections.
PART II: SYSTEM INSTALLATION AND SETUP
0.8 mm 1.2 mm
(#22 AWG) (#18 AWG)
305 m 610 m
(1007.7 ft.) (2001 ft.)
P/N: 4998152533-02 Page 31