BMEAHI0812 and BMEAHI0812H Specifications

Ruggedized Version of the Module

The BMEAHI0812H (hardened) equipment is a ruggedized version of the BMEAHI0812 (standard) equipment. It can be used at extended temperatures -25...70 ºC (-13...158 ºF) and in harsh chemical environments.

The BMEAHI0812H equipment, when within the standard temperature range 0...60 ºC (32...140 ºF), has the same performance characteristics as the standard BMEAHI0812 equipment.

At the temperature extremes -25...0 ºC and 60...70 ºC (-13...32 ºF and 140...158 ºF) the hardened versions can have downgraded analog input accuracy.

If this equipment is operated outside the -25...70 ºC (-13...158 ºF) temperature range, the equipment can operate abnormally.

CAUTION

UNINTENDED EQUIPMENT OPERATION

Do not operate this equipment outside of its specified temperature range.

Failure to follow these instructions can result in injury or equipment damage.

For more information, refer to chapter Installation in More Severe Environments.

Altitude Operating Conditions

The characteristics in the tables below apply to the modules BMEAHI0812 and BMEAHI0812H for use at altitude up to 2000 m (6560 ft). When the modules operate above 2000 m (6560 ft), apply additional derating.

For detailed information, refer to chapter Operating and Storage Conditions.

General Module Specifications

The eX80 HART analog input BMEAHI0812 and BMEAHI0812H modules possess the following general characteristics:

Head module compatibility		Local rack: BME P58 x0x0 CPU Remote I/O drop: BME CRA 312 10 adapter
Isolation:	between channels	1000 Vdc (1 minute duration)
	between channels and bus	1400 Vdc (1 minute duration)
	between channels and ground	1400 Vdc (1 minute duration)
Operating ambient temperature:	BMEAHI0812	0...60 °C (32...140 °F)
	BMEAHI0812H	-25...70 °C (-13...158 °F)
Vibration		10 mm / 3 g / x10 (per IEC60068-2-6)
Shock		30 g / 11 ms / x3 (per IEC60068-2-27)
Power consumption (3.3V)		400 mA
Power consumption (24V)		34 mA
Field device support		2-wire / 4-wire
Maximum overload authorized for inputs		Voltage: +/– 30 Vdc Current: +/– 90 mA
Hot-swap support?		Yes

Analog Specifications

The eX80 HART analog input BMEAHI0812 and BMEAHI0812 modules possess the following analog characteristics:

Number of channels		8
Type of inputs		High-density isolated fast inputs
Nominal range (full scale)		4-20 mA
Maximum conversion range		0.16...29.92 mA
Measurement accuracy for module:	Accuracy at 25 °C	0.15% of full scale(1)
	Accuracy at 0...60 °C	0.3% of full scale(1)
	Accuracy at -25...70 °C	0.55% of full scale(1)
Temperature drift		50 ppm / °C
Display resolution		15-bit plus sign bit
Least significant bit weight		0.458 μA
Refresh time:	per module	4 ms(2)
	per channel	4 ms(2)
Response time:	with HART enabled (without digital filter)	50 ms
	with HART disabled (without digital filter)	4 ms
Input impedance		Internal conversion resistor (250 Ω) + Internal protection resistor (see note)
Detection type		broken wire
Monotonicity?		Yes
Common mode rejection (50/60 Hz)		80 dB
Crosstalk between channels DC and AC 50/60 Hz		> 80 dB
Non-linearity		0.02% of full scale
Repeatability at 25 °C of 10 minutes stabilization time		0.01% of full scale
Digital filtering		1st order
(1) Includes conversion resistor detected error. (2) Refresh times are for only the module internal buffer, and are impacted by PLC cycle time.

NOTE: The internal protection resistor has a typical impedance of 25 Ω (min 3.6 Ω and max 50 Ω). The precision of the protection resistor does not impact the measured value.

HART Specifications

The eX80 HART analog input BMEAHI0812 and BMEAHI0812H modules possess the following HART characteristics:

HART protocols supported(2)	HART versions 5, 6 and 7
Number of channels	8
Scan time:	–
Typical(1)	1 s
Maximum(1)	5 s
Detection time for a non-responsive device	= (scan time) + (timeouts)
HART command system	ARCOM (interface to a HART master)
Topology	Point-to-point
HART I/O mapping?	Yes
(1) Scan time is the same for each channel and for the module. The scan time depends on the byte length of the command. The scan time values do not include PLC cycle time, which should be added to determine overall scan time. (2) The eX80 HART input module supports HART up to versions 7.2 and 7.3.