Specifications; Environment And Operational Conditions - YOKOGAWA BA11 Instruction Manual

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2. Specifications

The main function of BA11 is auto switching of 120 Ω line termination at RS-485 bus
to keep the communication balanced when Modbus slave device is disconnected. The
BA11 box detects if a Modbus slave device is connected to the port (J1..J4). If not, the
communication terminator is connected. If a Modbus slave is connected to a port (J1..J4),
the terminator is disconnected automatically.

2-1. Environment and operational conditions

- Power supply voltage
- Max. power consumption*
- Operational temperature
- Storage Temperature
- Maximum ambient humidity
Note: Total power consumption depends on number of Field Devices and the amount of
Modbus registers read from individual Field Device in time.
Other
- IP classification
- NEMA classification
Mechanical
- Size (LxWxH)
- Color
- Material
- Applicable torque on cover
screw (to meet IP66)
- Applicable torque on BA11
connector screws and
protection caps (to meet IP66) 0.25 Nm
- Mounting options
Connection
- Bus-Input (BUS-IN)
- Bus-Output (BUS-OUT)
- Field device Inputs (J1..J4)
All connections have to be used with the correct Yokogawa WU11 Interconnection cable
up to a length of 100 meter (328 ft).
For connection method and maximum allowed cable length in a Class I, DIV 2 location,
then refer to the enclosed Control Drawing D&E 2019-012-A60.
IM 12B06W03-01E-E
+2.7 VDC to +5.5 VDC
< 30 mW (@ +5.5 VDC, without connection of field devices)
-20ºC to +55°C (-5 ºF to +130 ºF).
-30°C to +70°C (-20 ºF to +160 ºF)
93% at +40°C (+100 ºF) (non-condensing)
IP66 (acc. ANSI/IEC 60529:2004; C22.2 No. 60529:2016)
Type 4X (acc. NEMA 250:2014; ANSI/UL 50E:2015)
150 x 64 x 34 mm (5.9 x 2.5 x 1.3 inch)
Grey (RAL 7001)
Aluminium Die Cast housing
Min. 1.1 Nm Max. 2.5 Nm
/UM Universal Mounting
M9 5-pin male connection to Modbus HOST/Master
(e.g. FLXA 402).
M9 5-pin female connection (for future application purpose)
M9 5-pin female connection.