BAPI SD2 Installation And Operation Instructions

SD2 - Status Display, Dual 7-Segment Display
Installation and Operation Instructions
35827_ins_SD2.pdf rev. 11/18/15
Overview
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
Fig. 1: SD2
with power provided by the Backplane; however, the unit can be powered
Status Display
directly with an alternate DC supply. The green LED indicates that power is
Module
available to the module.
Mounting
The SD2 Module plugs into either a BP2,
Fig. 2: SD2 Module plugging into
BP4 or BP8 Backplane or BP4V Vertical
a BP4 Backplane
Backplane as shown in Fig. 2.

Specifications

• 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
Specifications subject to change without notice.
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
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Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.com