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Number of channels

Two

Location of switches

Zone 0, IIC, T6 hazardous area
 Div. 1, Group A hazardous location

Location of proximity detector

Zone 0, IIC, T4–6 hazardous area if suitably certified
 Div. 1, Group A hazardous location

Hazardous-area inputs

Inputs conforming to BS EN60947–5–6:2001 standards for proximity detectors (NAMUR)

Voltage applied to sensor

7 to 9V dc from 1kΩ ±10%

Input/output  characteristics

Normal phase
 Outputs closed if input > 2.1mA (< 2kΩ in input circuit)
 Outputs open if input < 1.2mA (> 10kΩ in input circuit)
 Hysteresis: 200μA (650Ω) nominal

Line fault detection (LFD)  (when selected)

User-selectable via switches on the side of the unit. Line faults are indicated by an LED for each channel. The channel output relay is de-energized if an input line fault is detected.
 Open-circuit alarm on if I in < 50μA
 Open-circuit alarm off if I in > 250μA
 Short-circuit alarm on if Rin < 100Ω
 Short-circuit alarm off 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

Safe-area output

Two single-pole relays with changeover contacts
 Note: reactive loads must be adequately suppressed

Relay characteristics

Response time: 10ms maximum
Contact rating:  250V ac, 2A, cos ? >0.7
 40V dc, 2A, resistive load

LED indicators

Green: power indication
 Yellow: two: channel status, on when output is energized
 Red: two: LFD indication, on when line fault detected

Maximum current consumption

35mA at 24V

Power dissipation within unit

0.84W at 24V

Safety description (each channel)

Vo =10.5V   
Io =14mA  
Po =37mW  
Um = 253V rms or dc