Honeywell Midas User Manual

Midas
®
Gas Detector
14-3
14.2 Modbus/TCP Installation
24V DC
Relays
Modbus /TCP Ethernet
14.3 Power over Ethernet (PoE) Installation
Table 14-1. PoE Hub Power Budget
Mfr Model
Ports
Total
Power
Budget
(watts)
Max number
of Midas Gas
Detectors powered
PoE Total w/Pyro w/o Pyro
3Com 3CNJPSE-US 1 (injector) 15.4 1 1
NetGear FS108P 4 8 32 1 3
D-Link DES-1316 8 16 123 8 8
Allied
Telesyn
AT-8524POE 24 24 370 24 24
Modbus /TCP Ethernet
Ethernet CAT5
cable
Power over Ethernet PoE,
or Powered Hub
Option(a)
PC Access to MIDAS
units via options:
Ethernet CAT 5
cable
Option(b)
Wireless Router
Powered Hub
or PoE Hub
Power over Ethernet Injector

Honeywell Midas Specifications

General

Power Supply	24 VDC
Detection Technology	Electrochemical, Infrared
Sampling Method	Diffusion
Display	LCD
Communication	Modbus RTU, 4-20mA
Operating Temperature	-20°C to +50°C
Humidity Range	0% to 95% RH (non-condensing)
Target Gas	Multiple gases
Response Time	< 30 seconds
Operating Humidity	0% to 95% RH (non-condensing)
Outputs	4-20mA
Protection Rating	IP66
Certifications	ATEX, UL, CSA
Detection Gases	Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Methane (CH4), and others