suprema DM-20 User manual

2020/03/04 15:19 / DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Table of Contents
DM-20 Wiring Examples 1 ......................................................................................................................
Door Control Module, DM-20 1 ...........................................................................................................
Introduction 1 ..................................................................................................................................
Features 1 .......................................................................................................................................
Supervised Input 2 ..............................................................................................................................
Principal and Connection 2 ..............................................................................................................
BioStar 2 and DM-20 3 ....................................................................................................................
Connection Diagram 3 ........................................................................................................................
Wiegand Reader x 2 3 .....................................................................................................................
Wiegand Reader x 1, Slave Device x 1 4 .........................................................................................
System Diagram 5 ..............................................................................................................................
Controlling 2 Doors 6 ......................................................................................................................
Controlling 4 Doors 7 ......................................................................................................................
Anti-Passback 9 ...............................................................................................................................

2020/03/04 15:19 1/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
DM-20
DM-20 Wiring Examples
Door Control Module, DM-20
Introduction
DM-20 is a door control module that controls Wiegand readers and various I/O devices.
The DM-20 has 4 Supervised Input ports and various I/O interfaces. You can control the Wiegand
reader’s LED, Buzzer, Tamper, and more by engaging the DM-20 with BioStar 2.
Features
You can engage the DM-20 with BioStar 2 and control the Wiegand reader’s LED, Buzzer, Tamper,
●
and more.
The DM-20 can detect 4 states such as ON, OFF, Open, and Short Circuit by using the Supervised
●
Input port. With the ‘Trigger and Action’ function from BioStar 2, you can preset the operation to
perform when the DM-20 detects a state of Open or Short-Circuit.
2 Wiegand readers can be connected to 1 DM-20 maximum. When the DM-20 is connected as daisy-
●
chain topology via RS-485, you can connect up to 62 Wiegand readers.
The DM-20 has a power output port (12V, Maximum 1.5A) for Wiegand readers.
●
Supports various connections.
●
- RS-485 x1
- TTL input x4
- TTL output x6
- Wiegand x2
- Relay x4
- Supervised Input x4
Please refer to the DM-20 installation guide for cable connections.
●

2020/03/04 15:19 2/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Please refer to the BioStar 2 administrator guide for Wiegand reader and DM-20 Supervised
●
Input configurations.
Supervised Input
Principal and Connection
The Supervised Input detects the voltage flow on the circuit and supervises the input device based on
4 states (Open, Short-Circuit, ON, OFF). The resistors need to be connected as below.
[Example of Supervised Input connection diagram]
When connecting resistors as above, the circuit has the resistance as below.
When the switch is closed (ON), the current flows from the switch to R2 instead of R1 to R2.
●
Therefore, the circuit’s resistance is 2.2 ㏀ (R2).
When the switch is open (OFF), the current flows from R1 to R2. Therefore, the circuit’s resistance is
●
4.4 ㏀ (R1 + R2).
When the circuit is open, the resistance is infinite and the current does not flow.
●
When the ground or the cable connected to the input port is shorted, the circuit’s resistance is 0.
●
[LED Status and Circuit Resistance of DM-20 based on the device’s state]
State DM-20 LED Status Circuit Resistance
ON Green 2.2 ㏀
OFF Off 4.4 ㏀
Open Orange Infinite ㏀
Short Red 0
[Reference Voltage]
State 1K 2.2K 4.7K 10K
ON 0.4~0.7V 0.8~1.3V 1.4~1.8V 2~2.4V
OFF 0.8~1.2V 1.4~1.9V 1.9~2.5V 2.5~2.9V

2020/03/04 15:19 3/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
State 1K 2.2K 4.7K 10K
Open 3.1~3.3V 3.1~3.3V 3.1~3.3V 3.1~3.3V
Short 0~0.2V 0~0.2V 0~0.2V 0~0.2V
You can use the following resistors for the DM-20. 1 ㏀, 2.2 ㏀, 4.7 ㏀, 10 ㏀.
●
The DM-20 supports 4 Supervised Input ports (IN0(SP), IN1(SP), IN4(SP), IN5(SP)).
●
BioStar 2 and DM-20
DM-20 added to the BioStar 2 can monitor the device or switch’s open and short-circuit sates. You can
configure the ‘Trigger and Action’ and send out a preset signal or send an e-mail to the administrator
when the DM-20 detects a certain state.
Connection Diagram
Wiegand Reader x 2

2020/03/04 15:19 4/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Wiegand Reader x 1, Slave Device x 1

2020/03/04 15:19 5/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
System Diagram
The DM-20 can configure doors in numerous ways. You can connect 2 Wiegand readers to 1 DM-20
and easily control many doors by connecting the slave device and the DM-20 in daisy chain via RS-
485.

2020/03/04 15:19 6/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Controlling 2 Doors
Components: Master Device x 1, DM-20 x 1, Wiegand Reader x 2
Components: Master Device x 1, DM-20 x 1, Suprema Device(Slave) x 1, Wiegand x 2

2020/03/04 15:19 7/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Controlling 4 Doors
Components: Master Device x 1, DM-20 x 1, Wiegand Reader x 2. Suprema Device(Slave) x
2

2020/03/04 15:19 8/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Components: Master Device x 1, DM-20 x 2, Wiegand Reader x 4

2020/03/04 15:19 9/10 DM-20 Wiring Examples
Knowledge Center - http://kb.supremainc.com/knowledge/
Anti-Passback
Components: Master Device x 1, DM-20 x 1, Slave Device x 2, Wiegand Reader x 2