MTL 5500 Intrinsically Safe Isolators  MTL5018AC safety barrier
MTL5018AC SWITCH/ PROXIMITY DETECTOR INTERFACE two-channel, with line fault detection and phase reversal
The MTL5018ac enables two safe-area loads to be controlled by two switches or proximity detectors located in a hazardous area. Two relay outputs are provided. Independent phase reversal control allows an alarm condition to be signalled for either state of the sensor. A selectable line fault detect (LFD) facility detects an open or short circuit in either field circuit.
 

 

                                                       

 MTL5018AC Intrinsically Safe Isolators product introduction
 SPECIFICATION
 Number of channels ：Two
 Location of switches
 Zone 0, IIC, T4–6 hazardous area Div. 1, Group A hazardous location
 Safe-area output： Two relays with changeover contacts
 Hazardous-area inputs： Inputs conforming to NAMUR/DIN 19234 standards for proximity detectors
 Voltage applied to sensor ：7 to 9V from 1kΩ ±10%
 Input/output characteristics：Normal (reverse) phase: output energised (de-energised) if Iin >2.1mA or Rin 10kΩ Hysteresis: 200μA, typica
 Line fault detection (LFD)
 User-selectable via switches on the top of the unit. Line faults are indicated by an LED for each channel. A detected line fault de-energises the relay.
 Open-circuit alarm on if Iin 250μA
 Short-circuit alarm on if Rin 360Ω
 Note: Resistors must be fitted when using the LFD facility with a contact input 500Ω to 1kΩ in series with switch 20kΩ to 25kΩ in parallel with switch
 Phase reversal： Independent for each channel, user-selectable
 Relay type ：Single pole, changeover contacts
 Note: reactive loads must be adequately suppressed
 Relay characteristics
 Response time:
10ms maximum
 Contact rating:
 250V ac, 2A, cosø >0.7 40V dc, 2A, resistive load
 LED indicators
 Green: power indication
 Yellow: two: status of each channel (on when outputs are energised)
 Red: two: LFD indication for each channel (on when line fault detected)
 Maximum power dissipation：<2.5W
 Isolation 250V ac or dc between power supply, hazardous-area circuits and relay outputs
 Safety description (each channel)
 10.5V, 800Ω, 14mA, Um= 250V rms or dc
 Power Supply :
  85 to 265V ac 45 to 65 Hz

 Other relevant models for MTL5500 Safe Isolators
 MTL5018AC            MTL5501-SR             MTL5510               MTL5510B                MTL5511                 
 MTL5513                 MTL5514                   MTL5514D             MTL5516C                MTL5517                  
 MTL5521                 MTL5522                   MTL5523                MTL5523V - VL        MTL5524            
 MTL5524                 MTL5526                   MTL5541                MTL5541A                MTL5541AS