HIM
4
The Interface Solution Experts
Smart HART
Loop
Interface and Monitor
Specifications
Input Accuracy:
Reflects
the accuracy of the HART
field device
Input Impedance:
Transmit
Mode: 150 ohms;
Receive Mode: Less than
5kohms
Input Over-Range
Protection:
±5Vdc
ANALOG OUTPUTS
Output Accuracy:
±0.015%
of maximum output span
(20mA). Includes the
combined effects of linearity,
hysteresis, repeatability and
adjustment resolution.
Output Response Time:
<120ms, 10-90%
Isolation:
500Vrms channel-
to-channel isolation;
1000Vrms between case,
input, outputs and power
terminals, and will withstand
1500Vac dielectric strength
test for one minute with no
breakdown
Ripple:
Less than 10mV
peak-to-peak when
measured across a
250 ohm resistor
Output Limiting:
130% of
span maximum; 125% of
span typical
Output Protection:
Transient protection on
output
Load Capability:
0-20mA, 1100 ohms
maximum
Load Effect:
±0.01% of span
from 0 to maximum load
resistance
Line Voltage Effect:
±0.005% of output span for a
1% change in line voltage
Input Fail Modes:
PC
programmable to fail high, fail
low, hold last, hold last then
fail high, or hold last then fail
low (configurable hold time, 0-
60 seconds)
Output Limits on Input
Failure:
0-20mA: Fail Low to
0mA or
Fail High to 23.6mA;
4-20mA: Fail Low to 3.6mA
or Fail High to 23.6mA;
X-20mA (0<X<4): Fail Low to
90% of XmA or Fail High to
23.6mA
Performance
Weight
Performance
(Continued)
Indicators
Indicators
(Continued)
Ambient
Conditions
+TX Power Supply:
24.0Vdc
±10%@24mA
ALARM OUTPUTS
Digital Response Time:
Defined by HART protocol as
500msec maximum in Normal
HART Mode; 333msec
maximum in HART Burst
Mode
Alarm Response Time:
Digital Response Time +
150msec (Defined as time
from the field instrument’s
reporting a fault until the HIM
alarm is tripped)
Alarm Trip Delay:
Programmable from 0-120sec
MODBUS OUTPUTS
Type:
Standard MODBUS
RTU protocol interface over
RS485 (parameters as
specified in U.S. Standard
EIA-RS485)
Address Range:
Configurable from 1 to 247.
Unit will assume a MODBUS
address of 01 by default
Baud Rate:
Interface
supports the following: 300,
600, 1200, 4800, 9600, 19.2k.
MODBUS interface will
support even, odd and no
parities. Unit will assume a
baud rate of 9600 and no
parity by default
Character Format:
One start
bit, 8 data bits and one stop
bit
Data Format:
User-
selectable Standard LSW
(Least Significant Word) or
Swapped MSW (Most
Significant Word). Unit will
assume Standard LSW by
default
Power Consumption:
2-3.5W, nominal; 4.5W
@24Vdc maximum for units
using transmitter excitation to
supply loop power a 2-wire
instrument
LCD Type:
Two-line LCD;
Top Row, 10mm (0.4 in) high
black digits on a reflective
background; Bottom Row,
6mm (0.225 in) high digits
on a reflective background;
two-digit HART address
indicator
Specifications and information subject to change without notice.
Format:
Top row is five
alphanumeric characters,
plus sign and decimal point;
bottom row is five
alphanumeric characters
Decimal Points:
User-
selectable for 0, 1, 2 or 3
places after the decimal point
or automatically adjusting with
a four decimal point maximum
Range:
-99999 to 99999
Minimum Display Span:
1.00
Display Update Rate:
100msec
LED Type:
Dual color
red/green indicate:
INPUT LED: Whether (green)
or not (red) the HART input is
connected and functioning
properly
READY LED: Whether
(green) or not (red) the HIM is
initialized and operating
properly
TRIP 1 and 2 LED: Shows the
status of alarm off (green) or
alarm on (red)
Operating & Storage
Range:
-40°C to +85°C
(-40°F to +185°F)
Display Range:
-25°C to +85°C
(-13°F to +185°F)
Relay Range:
-25°C to +70°C
(-13°F to +158°F)
Relative Humidity:
0-95%, non-condensing
Ambient Temperature
Effect:
±0.0065% of
span/°C maximum
RFI/EMI Immunity
(Standard):
20V/m@20-1000MHz, 1kHz
AM, when tested according to
IEC1000-4-3-1995
RFI/EMI Immunity (with
-RF Option):
30V/m@
20-1000MHz, 1kHz AM, when
tested according to IEC1000-
4-3-1995
Noise Rejection:
Common
Mode: 100dB@50/60Hz
567 grams (16 ounces)
