Installation and Operation Guide | DGS Modbus
RS8HJ102 | 3
© Danfoss | ADAP-KOOL® | 2016.12
1. Overview
The DGS Modbus is a state-of-the-art fixed gas detector which can
detect a wide range of gases. It can also activate external systems
such as fans or shut down and activate sirens, warning lights,
activate dial out systems, or connect to BMS systems including
Danfoss AK-SM 720/ AK-SM 350 and the AK-SM 800 series.
The DGS Modbus can be used:
• in new buildings/areas that require continuous monitoring.
• to add gas detection solutions to an existing system.
1.1 General Information
1.2 Technical Specifications
Power Supply
12/24V AC/DC ±20%, 50/60 Hz, 2 W max.
Power Consump-
tion
SC:153mA / IR: 136mA
Power Monitoring
Green LED indication
Visual Alarm
RED LED indication
Audible Alarm
Buzzer, enabled/disabled
Fault Monitoring
Red LED ON ~ Green LED OFF
Fault State
0 - 0.5V (1-5V), 0 - 1V(2-10V), 0 - 2mA (4-20mA)
Analogue Outputs
0-5V, 1-5V, 0-10V, 2-10V, 4-20mA
Digital Outputs
1-Relay, SPDT, Failsafe configured by Modbus or
by product selection
1-Amp / 24V A.C./D.C. / 120V A.C.
Configurable delay by Modbus or by jumper
configuration: 0, 1min., 5min., 10min.
IP Enclosure rating
IP 41 or IP 66
Temperature Rat-
ings
IP 41: -20°C to +50°C ( -4°F to 122°F )
IP 66: -40°C to +50°C (-40°F to +122°F )
Dimensions/
Weights per Enclo-
sure Type
IP41
86 x 142 x 53 mm
3.35” x 5.59” x 2.09”
180 g
6.3 oz
IP66
175 x 165 x 82 mm
6.89” x 6.5” x 3.29”
629 g
1 lb 6 oz
IP66 w/
Remote
Sensor
175 x 155 x 82 mm
6.89” x 6.1” x 3.29”
790 g
1 lb 11 oz
IP66 Airflow/
Duct *
175 x 125 x 82 mm
6.89” x 4.9” x 3.29”
578 g
1 lb 4 oz
RS-485 Communi-
cations
Baud rate : 9,600, 19,200 or 38,400 (default)
Start bits:
1
Data bits:
8
Parity:
even
Stop bits:
1
Retry time: 500ms (min time between retries)
End of message: silent 3.5 characters
Approvals
IEC61010-1
RoHS WEEE
* See appendix A for supported air flows and duct sizes
