Bacharach MVR-300, User Manual

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MVR-300™ Refrigerant Gas Detector
34 P/N: 6203-9000 Version 1
SECTION 8. TECHNICAL DATA
8.1 Approvals
Specification Description
EN 50270:2015 Electromagnetic compatibility. Electrical apparatus for the detection and
measurement of combustible gases, toxic gases or oxygen
CE Approval pending
UL/CSA/IEC/EN 61010-1 Approval Pending
8.2 Specifications for Modbus RTU Digital Communication over RS-485
Specification Description
Baud Rate 9,600
1
or 19,200 (selectable)
Start Bits 1
Data Bits 8
Parity None
1
, odd, even (selectable)
Stop Bits 1
1
or 2 (selectable)
Retry Time 500 ms, min time between retries
End of Message Silent 3.5 characters
1
- Default Values
8.3 Power Supply and Relay Specifications
Specification Description
Operating Voltage 100 to 240 VAC, 50/60 Hz
Operating Power 4 W max
Power Monitoring Green LED
Relay Rating 2 SPDT; 1 A at 30 VDC, 1 A at 125 and 250 VAC, resistive load
Audible Alarm
Internal Buzzer; open enclosure
85 dBA at 10 cm (4 in); 80 dBA @ 30 cm (12 in)
Alarm Delay 0 to 15 minutes (selectable 0, 5, 10, 15)
8.4 Wiring Specifications
Specification Description
Power 3-core cable, 14 to 20 AWG (0.5 to 2.0 mm
2
)
Relay 3-core cable, 18 to 20 AWG (0.5 to 1.0 mm
2
)
Modbus Network 2-core twisted pair shielded cable 18 to 24 AWG (0.2 to 1.0 mm
2
) with
120 Ohm characteristic impedance; Use Belden 8761 or similar;
Max diameter of cable plus heat shrink must be
≤
5 mm (0.2 in) (to fit
boot)
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