Datasheet SPX-1300 Datasheet (Cypress)

SPX-1300

Operations Manual

Cypress Suprex® Reader Extender

SPX-1300_MAN_030513

Electrical and Mechanical Specifications

Physical

SPX-1300 Aluminum Enclosure 3.5" x 2.75" x .75"

Temp

Storage(-55˚C to + 150˚C)
Operating(-40˚C to +80˚C)

Humidity

95% (non-condensing)

Input

Unreg Input 8 to 16 VDC* @ 200mA Max

Power

Output

+5VDC @100mA

Data I/O

Voltage Ratings

Interface

Reader 0- 30VDC
LED - 0 - 30VDC
Analog 0 - 5 VDC

3.3”

DataBender CVX-1300

2.8”

1.4”

3.65”

ø 0.15”

External Dimensions and Mounting Holes

Unit Height = 0.75”

*See Notes on following page for temperature and power ratings

q `123458r

This complies with part 15 of the FCC rules

Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) this device must accept any interference received, including

interference that may cause undesired operation.

Cypress Computer Systems, Inc. ⌖ Lapeer, MI 48446 ⌖ www.cypresscomputer.com

© 2012 Cypress Computer Systems Inc.

2-8 to 16 VDC In

*

1-D0/CLK Input

*

1234567

8

Switch

6 7 8

0

1 x

2 x

3 x x

4 x

5 x x

6 x x

7 x x x

Wiegand

Wiegand / No Filter

Strobed Rising Edge (MR-5)

Strobed Rising Edge (Dorad0 644)

Strobed Rising (Mag-Tek)

Strobed Falling Edge

Reserved

F2F

x = ON

Dip switch #4 is ON

-Disable Pullup resistors

Dip switch #4 is OFF

-Enable Pullup resistors

Switch

6 7 8

0

1 x

2 x

3 x x

4 x

5 x x

6 x x

7 x x x

Wiegand

Wiegand / No Filter

Strobed Rising Edge (MR-5)

Strobed Rising Edge (Dorad0 644)

Strobed Rising (Mag-Tek)

Strobed Falling Edge

Reserved

F2F

x = ON

1234567

8

Dip switch #4 is ON

-Enable Pullup resistors

Dip switch #4 is OFF

-Disable Pullup resistors

1-Ground

Diagnostic LED

8-485(+)

7-485(-)

6-+5 VDC Out

5-Prog Res 2
4-Prog Res 1

3-LED Input

2-D1/Data/F2F Out-

1-D0/CLK Out

Note: F/2F connections
support unsupervised
mode only.

2-8 to 16 VDC In

1-Ground

8-485(+)

7-485(-)

6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)

3-LED Output

2-D1/Data/F2F Input

External connections and DIP Switch Settings

Central Unit

Remote Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.
9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.
6-RS232 Out
5-RS232 In
4-Ground
3-Aux Out
2-Relay2 Input
1-Relay1 Input

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.
9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.
6-RS232 Out
5-RS232 In
4-Ground
3-Aux In
2-N/C
1-N/C

Central Unit
Settings

DIP Switch #1 ON

-Service Mode
DIP Switch #1 OFF

-Run Mode

Remote Unit
Settings

DIP Switch #1 ON

-Service Mode
DIP Switch #1 OFF

-Run Mode

8

10

12

14

16

80

55

35

-40

Ambient Temperature

(Degrees Celsius)

Supply Voltage

Temperature/Voltage de-rating curve

Electrical and Environmental Specifications

The SPX-1300 units should be operated with a filtered 12 Volt nominal DC supply.
However, any voltage between 8 and 16 volts can be utilized by following the temperature /voltage derating curve.
Voltage should not exceed 16 VDC.

Digital Data (D0/D1) Inputs and Outputs are OpenCollector with switchable 1k pullup resistors..

Data I/O Points are rated for the following voltages:
0 - 5 VDC with pullups on
0- 24 VDC with pullups off

All Digital Inputs and Outputs are 0 - 24 VDC tolerant . Pullup resistors should be disabled when using I/O at voltages
greater than 5VDC to prevent excessive current draw and possible component damage.

Analog Inputs are rated for 5 VDC max.
The Relay 3, Relay 4 inputs and Programming resistor inputs are analog inputs and are limited to 5 volts DC Maximum.

All inputs and outputs are provided with transient and static protection.

The RS-485 communication channel will provide the best performance using shielded twisted pair wiring. Other wire
types can be used, and performance will depend upon actual field conditions. The Suprex units will typically function
with: Coax, THHN building wire, Cat5 and Cat 3 cable, etc.

Troubleshooting - Diagnostic Indicators

When the Suprex units are operating correctly and have a valid communication channel between
the Remote and Central units the Diagnostic indicators on each unit will flash green rapidly
(2-3 flashed per second).

If the units are not communicating, viewing the diagnostic indicator LED’s may help to determine
the
nature of the problem.

DIAGNOSTIC LED NOT ILLUMINATED:

If the LED(s) are not illuminated on the unit(s) then the unit is not getting power. The Diagnostic
LED’s
will be illuminated when power is applied.

CENTRAL UNIT FLASHING BETWEEN RED/GREEN:

With power applied and no communication path between the Remote and Central, the Central
unit will flash the diagnostic indicator alternately between Red and Green.

REMOTE UNIT ILLUMINATED RED:

The Remote unit will diagnostic LED will illuminate solid (not flashing) red if it is not receiving
communication from the Central.

REMOTE AND CENTRAL UNITS FLASHING BETWEEN RED/GREEN:

The Central is not Receiving communication from the Remote.

Suprex Operation and Initial Setup

*

1-D0/CLK Input

*

Actual connections will differ based on the type of format, features utilized, and equipment interface.
The following diagrams are an example of a typical installation using the Suprex 1300 and a Wiegand format
Reader and Access Control Panel.

1. First connect units as shown below to verify basic function and communication. This should be done in a
convenient location such as a bench top before installing units in the field. Both units can share the same power
supply if the power supply has sufficient capacity.

When Connected as shown below, both units should have the Diagnostic LED flashing Green about 2-3 flashes
per second (Rapid flashing)

8 - 16 VDC
Power
Supply

8 - 16 VDC
Power
Supply

+VDC

Ground (0V)

+VDC

Ground (0V)

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Central Unit

Remote Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

*

Suprex Operation and Initial Setup

1-D0/CLK Input

*

1-D0/CLK Input

Format setup and Remote Side Basic Reader Connections

2. Remove power from the units and set DIP switches if necessary. The units are set for Wiegand format data as
the default setting from the factory. If a Wiegand format reader is being used, it should not be necessary to change
the DIP switch setting.

For applications that require a change in the DIP switch setting. Remove the board from the enclosure and set the
DIP switch to the required format on both the Central and Remote units.
Refer to DIP switch diagram for the list of available formats.

3. Connect the Reader to the Remote unit. 2 different standard applications are shown as examples below.

Note: The LED and Door Strike operation of the SPX-1300 differs from previous versions.

The connection and operation is covered in the next 2 pages.

8 - 16 VDC
Power
Supply

Wiegand Card

Reader

DC Power In

Ground

LED In

Data 1
Data 0

485 to

Central

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Remote Unit

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com

7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

8 - 16 VDC
Power
Supply

Wiegand Card

Reader

DC Power In

Ground

LED In

Data 1
Data 0

Wiegand Reader with 5 Volt power supplied by Suprex

2-8 to 16 VDC In
1-Ground

485 to

Central

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Remote Unit

Wiegand Reader with 8-16 Volt power Connections

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com

7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

*

*

Suprex Operation and Initial Setup

1-D0/CLK Output

Central Side Basic Panel Connections

4. Connect the Central unit to the Access control panel. Power can be supplied by either the Access
Control Panel or an External Power supply. A ground connection must be provided to the Suprex unit in either case.

2-8 to 16 VDC In

Wiegand

Access Control

DC Power

Ground

LED In

Data 1
Data 0

485 to

Central

1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

Central Unit

12-RLY4 N.O.

11-RLY4 Com

10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Wiegand Format Access Control Panel with 8-16 Volt Power From Panel

8 - 16 VDC
Power
Supply

Wiegand

Access Control

Ground

LED In

Data 1
Data 0

485 to

Central

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

Central Unit

12-RLY4 N.O.

11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.

8-RLY3 Com

7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out

2-Relay2 Input
1-Relay1 Input

Wiegand Format Access Control Panel with 8-16 Volt Power From External Supply

Suprex Operation and Initial Setup

*

1-D0/CLK Output

*

Central Side Basic Panel Connections

5. To activate the relay on the Remote unit connect as shown below. These connections can be used to allow the
Remote relay to operate a DOOR STRIKE, GATE, or other locking hardware. Refer to following pages in this
document for details of each I/O operation and connection. The Relay inputs are active LOW and will activate the
relay when connected to ground.

There are two relays available for accessory outputs at the Remote end. Either relay can be used to provide the Door
Strike or Gate activation function. This example uses Relay 1.

2-8 to 16 VDC In

Access Control
Panel

LED OUT

1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.

8-RLY3 Com

7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Typical Access Control Panel Connection to activate Door Strike and reader LED.
Strike follows LED

Only Relay and LED Connections are shown for clarity, refer to previous diagrams for
Power,Data and communications connections.

2-8 to 16 VDC In

Access Control
Panel

LED OUT

STRIKE

1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.

8-RLY3 Com

7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Typical Access Control Panel Connection to activate Door Strike and reader LED. Strike
follows separate panel output.

*

*

Suprex Operation and Initial Setup

1-D0/CLK Input

I/O Controls

6. The Cypress SPX-1300 provides additional data channels to support access control hardware such as door
strikes, tamper alarms, request to exit status, etc. These signals are sent to and from the Remote and Central units
without the need to run additional wiring.

The accessory control I/O use active low inputs. When the inputs are floating (nothing connected) the associated
output will be set to a high level. When the input is set to 0Volts (Ground) the input will activate its associated
output. All Accessory outputs are Open Collector type and will switch to Ground when activated.

Each input will have an associated output. See the following pages for a diagram of each I/O pair.
Inputs can be tested by making a jumper connection to ground and monitoring the associated output.

2-8 to 16 VDC In

Input

1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Output

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

LED Input and Output

Red arrow denotes direction
of command signal

Remote Unit

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

*

2-8 to 16 VDC In

*

1-D0/CLK Input

1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

Suprex Operation and Initial Setup

I/O Controls

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

Central Unit

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Input

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Red arrow denotes direction
of command signal

Remote Unit

Relay 1 Input and Output

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

Output

*

*

1-D0/CLK Input

Suprex Operation and Initial Setup

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

I/O Controls

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Input

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Red arrow denotes direction
of command signal

Remote Unit

Relay 2 Input and Output

Output

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

*

*

1-D0/CLK Input

Suprex Operation and Initial Setup

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

I/O Controls

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Input

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Red arrow denotes direction
of command signal

Remote Unit

Relay 2 Input and Output

Output

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

*

*

1-D0/CLK Input

Suprex Operation and Initial Setup

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

I/O Controls

Central Unit

12-RLY4 N.O.
11-RLY4 Com
10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Output

Input

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Red arrow denotes direction
of command signal

Remote Unit

Relay 3 Input and Output

12-RLY2 N.O.
11-RLY2 Com
10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

Relay 3 functions as an Alarm relay and monitors the condition of the communication link between the
Central and Remote units. Relay 3 is activated when power is applied and the communication link
between the Central and Remote is functioning. Relay 3 will become deactivated (Alarm condition)
when either the Relay 3 input on the remote is active OR the Remote unit is unable to communicate
with the Central unit.

*

*

1-D0/CLK Input

Suprex Operation and Initial Setup

I/O Controls

Input

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

1-D0/CLK Output

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Central Unit

Remote Unit

Output

12-RLY4 N.O.
11-RLY4 Com

10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com

7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Red arrow denotes direction
of command signal

12-RLY2 N.O.
11-RLY2 Com

10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com

7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

Relay 4 Input and Output

*

*

1-D0/CLK Input

Suprex Operation and Initial Setup

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-Prog Res 2
4-Prog Res 1
3-LED Input
2-D1/Data/F2F Out
1-D0/Clock Out

I/O Controls

Central Unit

12-RLY4 N.O.
11-RLY4 Com

10-RLY4 N.C.

9-RLY3 N.O.
8-RLY3 Com
7-RLY3 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux Out
2-Relay2 Input
1-Relay1 Input

Output

2-8 to 16 VDC In
1-Ground

8-485(+)
7-485(-)
6-+5 VDC Out
5-RLY4 Input (5V)
4-RLY3 Input (5V)
3-LED Output
2-D1/Data/F2F Input

Red arrow denotes direction
of command signal

Remote Unit

Aux Input and Output

12-RLY2 N.O.
11-RLY2 Com

10-RLY2 N.C.

9-RLY1 N.O.
8-RLY1 Com
7-RLY1 N.C.

6-RS232 Out

5-RS232 In

4-Ground

3-Aux In

2-N/C
1-N/C

Input

*

*

R1 in

Ground

SPX-XXXX Application Note

1K

Using Supervised Contacts with the SPX-series Extenders

Applies to the following products: SPX-1300 and EXP series products.

This application note describes the connections necessary to convey supervised contact status over a Suprex®
communication link. The configurations described in this app note should apply to most panels that utilize supervised
contacts. When connected as described, the Suprex® system will provide a supervised signal to the panel interface by
reading the supervised status of the contacts connected to the Suprex® Remote unit.

Theory of operation: The Access control panel is looking for a certain value of resistance connected to the supervised
contact terminals. The Suprex® Central unit will provide these resistance values locally at the panel so that the correct
supervised status is maintained. At the same time, the Remote unit must maintain supervision of the wires connected to
the relays and switches that are connected to the remote access point. The contact supervision is provided by the
Remote unit. The Suprex® system does this by comparing the value of programming resistor at the Central unit with the
resistance seen at the Remote interface terminals. When there is a difference in the two values, the Relay on the Central
unit is activated.
There are two different examples. One example is monitoring a normally closed contact at the Remote unit, and the other
example is monitoring a normally open contact at the Remote unit. In the examples given, a normally closed contact will
require a programming resistor of 1K and a normally open contact will require a programming resistor of 2K. Other
resistor values can be used but 1K resistors are the most common. Other resistance values will require different value(s)
for the programming resistor(s).

2K

1K

Door
N.C.

Contact

Rex

N.O.

Contact

8 to 16 VDC In
Ground

Diagnostic LED

RS-485 (+)
RS-485 (-)

+5 VDC out
Prog Res 4
Prog Res 3
LED In

D1/Data out
D0/Clk out

Central Unit

1K

1K

1K

Relay 4 N.O.
Relay 4 Com
Relay 4 N.C.

Relay 3 N.O.
Relay 3 Com

Relay 3 N.C.

RS-232 out

RS-232 in

8 to 16 VDC In

Diagnostic LED

RS-485 (+)
RS-485 (-)
+5 VDC out

R4
R3

LED out
D1/Data In
D0/Clk In

Ground
Aux out

R2 in

Remote Unit

I1-

1K

I1+

I2-

1K

I2+

Relay 2 N.O.

Relay 2 Com

Relay 2 N.C.

Relay 1 N.O.
Relay 1 Com

Relay 1 N.C.

RS-232 out

RS-232 in

Ground

Aux in

Not used
Not used