Manual

Spectrex Inc. - SafEye
TM
200 Gas Detector Manual – TM 792100, Rev. D, May 2004
21
4.2 Electrical Specifications
• Operating Voltage: 18- 32 VDC
• Power Consumption
Detector 150 mA @ 24 VDC (200 mA Peak)
Source 100 mA @ 24 VDC (220 mA Peak)
• Electrical input protection:
The input circuit is protected against voltage-reversed polarity, voltage
transients, surges and spikes according to MIL-STD-1275A.
• Electrical Interface (see figure 4)
• Electrical outputs
A. 4-20mA Current Output:
The 4-20mA is source configuration. The maximum permitted load
resistance is 600 Ohm.
Two 4-20mA options:
• Continuous reading - default (See Table 4)
• Discrete reading
(See Table 5)
B. Communication Network:
The Detector is equipped with an RS 485-communication link that can
be used in installations with computerized controllers. It enables
continuous communication with up to 64 Detectors.
C. Relays Output:
The Detector include up to three relays.
Table 14: Dry Contact Relays
Relay Type Normal Maximum Ratings
Alarm SPDT NO, NC 2A at 30VDC or 0.5 at 250 VAC
Accessory SPST NO 5A at 30VDC or 250 VAC
Fault * SPST NC 5A at 30VDC or 250 VAC
* Fault Relay is normally energized, the contact will be closed, and when it is in
Fault situation, the relay is opened.