35827_ins_SD2.pdf
SD2 - Status Display, Dual 7-Segment Display
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
1
Specifications subject to change without notice.
Installation and Operation Instructions
rev. 11/18/15
Overview
Mounting
The SD2 Module plugs into either a BP2,
BP4 or BP8 Backplane or BP4V Vertical
Backplane as shown in Fig. 2.
Fig. 2:
SD2 Module plugging into
a BP4 Backplane
Specifications
The SD2 is an ETA module that is used to indicate a program error code
which requires a manual reset. The module includes a manual reset switch
that can be pressed to route a reset signal to a controller.
The polarity of the reset switch can be set to Normally Open (NO) or
Normally Closed (NC) operation via the jumper on J2. When the reset
switch is pressed, Terminals #3 and #4 of J1 are either connected or
disconnected. Two 7-segment displays are available at the edge of the
module, denoting where the input signal is within the range.
The SD module receives an input signal from a controller, and then
displays a number from 0 to 10 up to 0 to 50, depending on the jumper
position of J3. It can accept a current input of either 0 to 20mA or 4 to
20mA or a voltage input of 0 to 10V or 2 to 10V.
The unit is typically mounted in a BP2, BP4, BP8 or BP4V Backplane
with power provided by the Backplane; however, the unit can be powered
directly with an alternate DC supply. The green LED indicates that power is
available to the module.
Fig. 1:
SD2
Status Display
Module
• Power Supply:
MCP2456 switching regulator. Supplies 12V which is then dropped down by linear regulator
MCP1703 to 5V for the on-board circuitry, and acts as the reference for the ADC.
• Microprocessor:
PIC16F1938 utilizing on-board ADC, LCD driver, UART, ISP and GPIO.
• Dual 7-segment display:
LTS-1802
Power Voltage:
16 to 35VDC
Power Current:
50mA Max
