Simpson Electric H235 Specification Sheet

DISPLAY
Type: 7-segment, red LED
Height: 0.56” (14.2mm)
Decimal Point: 3-position software program-

mable from front panel

Overrange: Display reads “EE”
Underrange: Display reads “-EE”
Alarm Indicators: Two LED indicators for

alarm conditions on front panel

POWER REQUIREMENTS
AC Voltages: 24, 48, 120, 220VAC, ±10%
DC Voltages: 12-48VDC, ±15%
Power Consumption: 6VA

ACCURACY:

0.2% of reading ± 2 counts

APPROVALS:

UL recognized; CSA and; CE certified

ENVIRONMENTAL
Operating Temperature: 0°C to +50°C
Storage Temperature: -10°C to +60°C

Relative Humidity: <90% non-condensing
Ambient Temperature: 23°C

Temperature Coefficient (per °C):

±100PPM/ °C
±0.05dgt/ °C

Warmup Time: 10 minutes
NOISE REJECTION

NMRR: 50db, GR = 50
CMRR: 100db, GR = 1

ANALOG TO DIGITAL CONVERSION
Technique: Special dual slope
Rate: Approximately 2 display updates per

second, nominal

MECHANICAL
Depth: 3.24” (82mm)
Bezel: 3.8” x 1.9” x 0.32”

(96mm x 48mm x 8.1mm)

Panel Cutout: 3.6” x 1.8”

(92mm x 45mm) 1/8 DIN

Case Material: ABS/polycarbonate blend
Weight: Approximately 10.5oz (297.7g)

Specifications

Wiring Diagram

Input Signal: Connect the signal to be monitored to the IN HI and the IN
LO terminals. Note that the IN HI signal has two terminals that can be

used, depending on the process being monitored. The upper IN HI ter­minal accepts 4-20 mA inputs. The lower IN HI terminal accepts 1-5VDC
and 0-10VDC inputs.

Supply Power: Connect the power to the supply power terminals.
Display Hold: Short the terminals marked HOLD to activate. The com-

parison of the input variable with the alarm set point remains active. To
reactivate this display, disconnect the short circuit.

Programming

INPUTS: DC Process

Input Power (-)

Input Power (+)

Display Hold

The Programming mode allows the user to define the instrument para­meters:

- Password for access to programming

- Decimal point position

- Minimum and maximum values of the electrical range

- Display scaling

The normal measurement and control functions are not active during pro­gramming mode. The output relays are de-energized. Analog outputs
are low.

Termination of programming mode and return to the measurement and
control mode is automatic at the end of all the programming steps or
after three minutes with no key activation. Display will briefly show “End,“
then “Run.“

Access to programming

Press and hold the S key and then press ▲. The display should show
“PAS.” During this phase the instrument asks for the password, which is
a number from 0 to 199. The instrument is delivered with a password of

0. Use the ▲ and ▼ keys to change the displayed value. Press S to
enter the password and move to the next parameter.

If a number from 0 to 99 is used as the password, the operator cannot
change any of the parameters without knowing the password. This is
helpful in locking out the front panel from accidental programming. In sit­uations where the operator needs the flexibility to change the set points
only, use a password from 100 to 199. This allows the operator to
access the set point programming mode, but jumps past the other pro­gramming functions. If the correct password is entered, the program­ming functions are accessed as normal.

IN LO

Signal Input

IN HI 4-20mA

Signal Input

IN HI 1-5V, 0-10V

Signal Input

Maximum

Input Display Voltage Overload

Range Resolution Drop (10 Sec.)

4-20mA 10A 0.2V 200mA

(Input

Impedance) (1 Min.)

1-5V 10mV 1M 690V

0-10V 10mV 1M 690V