Texmate, Inc. Tel. (760) 598-9899 • www.texmate.com
Page 2
BX-B31 Data Sheet (BX3)
Functional Diagram
Pins 1 to 6 - Input Module: See the individual pin out of the input sig-
nal conditioning module selected. Usually Pin 1 is the Signal Input High
pin and Pin 3 is the Signal Input Low pin. All calibration and scaling
functions are performed on the individual input signal conditioner mod-
ule. See pages 6 and 7.
Pin 8 - Common of 10 Amp Form C or 5 Amp Form A SP1 Relay.
Pin 9 - Normally Closed Contact of 10 Amp Form C SP1 Relay.
Pin 10 - Normally Open Contact of 10 Amp Form C or 5 Amp Form A
SP1 Relay.
Pin 11 & Pin 12- Normally Open Contacts of 5 Amp Form A SP2
Relay.
Pin 14 & Pin 15 - AC/DC Power Input: These pins are the power pins
of the meter and they only accept a special polarized screw terminal
plug that can not be inserted into any other input socket. The stan-
dard meter has a auto sensing AC/DC power supply that operates
from 85-265 VAC/95-370 VDC (PS1 Std). An optional isolated low
voltage power supply that operates from 15-48 VAC/10-72 VDC (PS2) is
also available.
Connector Pinouts
Pin Descriptions
Pin Socket
Pin Socket
Right-angled
Screw Terminal Plug
Input Power
Screw Terminal Plug
Connectors
15 to 48 VAC
10 to 72 VDC
85 to 265 VAC
95 to 370 VDC
NC 1
NO 1
COM 2
NO 2
9
8
1
2
3
4
5
6
10 11 12
14 15
AC
Neutral
– DC
AC
Line
+ DC
See Lynx Family Input
Signal Conditioning Modules
PS2
PS1
COM 1
This meter comes standard with screw terminal plug connections.
Top Catches
TO REMOVE REAR COVER
Release From Bottom
This meter uses plug-in type screw terminal connectors for all input
and output connections. The power supply connections (pins 14
and 15) have a unique plug and socket outline to prevent cross con-
nection. The main board uses standard right-angled connectors.
I-
Series Input Signal
Conditioning Module
NO 2
NC 1
NO 1
9
10
11
12
14
15
2
3
5
1
4
1
2
3
4
5
6
7
8
9
10
Input and output
pins vary for
different modules.
Please see the
specific module
data sheet for
details.
1.25 V
Bandgap
Reference
BX-B31 Functional Diagram with one 10 Amp Form C
and one 5 Amp Form A Relay
AC Neutral, – DC
AC Line, + DC
AC/DC Power Input
1 3 5 7
2 4 6 8
9
1 0
Socket for Input Signal
Conditioning Module
Input Hi
Input Lo
+5VDC
-5VDC
+24VDC
Analog Common
System Ground
24 V Return
Amplifier
Circuit
Proportional
Brightness
Circuit
Proportional
Brightness Pot
Relay Activation
Selection Header
10K
Comparators
and LED
1 to 10
Driver Circuit
Comparators
and LED
11 to 20
Driver Circuit
Comparators
and LED
21 to 30
Driver Circuit
Com 1 8
SP1 Relay
Driver Circuit
SP2 Relay
Driver Circuit
BX-B31 with no setpoints
BX-B31 with 1 setpoint
BX-B31 with 2 setpoints
5A
SP2
+5 V
+5 V
10A
SP1
+5 V
5A
SP2
8
NO 1
9
NO 1
NO 2
10
11
12
with two 5 Amp Form A relays
14
15
5A
+5 V
SP1
AC Neutral, – DC
AC Line, + DC
AC/DC Power Input
Low 1
High 1
Low 2
High 2
NTC
EMI Filter
Isolated
Switching
Supply
-5 V DC
+5 V DC
+24 V DC
ISO
GND
GND
+15 V DC
ISO
GND
NTC
EMI Filter
Isolated
Switching
Supply
-5 V DC
+5 V DC
+24 V DC
ISO
GND
GND
+15 V DC
ISO
GND
FRONT OF METER WITH BEZEL AND FILTER REMOVED
To adjust the setpoint on the BX-B31 with relays, remove the
front bezel and faceplates. Use needlenose pliers to remove
and reposition the setpoint jumper clips.
For Setpoint #1: Insert the jumper clip between Row #1 and
Row #2, directly below the LED that you wish to activate.
For Setpoint #2: Insert the jumper clip between Row #2 and
Row #3, directly below the LED that you wish to activate.
LEDs
Row 1
Row 2
Row 3
Custom Face Plates
Changing the Setpoints From the Front of the Meter
Low 1
High 1
Low 2
High 2
Relay Activation Select Header
Select High to energize the relay when the setpoint is
exceeded. Select Low to energize the relay when the
display is below the setpoint.
The Proportional Brightness Potentiometer superimposes a proportion-
al brightness band to the leading edge of the bargraph which creates
Proportional Brightness Band Potentiometer
WARNING
:
AC and DC input signals and power
supply voltages can be hazardous. Do Not connect
live wires to screw terminal plugs, and do not insert, remove or
handle screw terminal plugs with live wires connected.
!
Texmate Produces Thousands of Custom
OEM Face Plates
Have Texmate Design and Build a Custom Face Plate
to Suit your Next project!
• Custom face plates have a non-recurring artwork
charge. A serial number is then assigned to each
artwork, to facilitate re-ordering.
• Small Run or One-Off custom face plates incur an installation charge,
and are generally printed on a special plastic film, which is then lami-
nated to custom faceplate blanks as required.
• Large Run (250 pieces min): custom face plates are production silk
screened, issued a part number, and held in stock for free installation
as required by customer orders.
• OEMs may also order Custom Meter Labels, Box Labels Custom
Data Sheets and Instruction Manuals.
the optical appearance of a pointed arrow . This feature produces a
display of infinite resolution. The position of the signal in relation to any
two adjacent segments and the scale on the faceplate can be accu-
rately ascertained to within 1%. When the amplitude of the proportion-
al band is adjusted counterclockwise to zero, the smooth proportional
advance of the display will be replaced by a step by step movement as
each bar is either turned full on or full off.
