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USER'S MANUAL FOR 16 CHANNEL RELAY OUTPUT BOARD

16 Channel Relay
Output board

Product Code: A16RELAY
 
INTRODUCTION
The 16 Channel Relay Output board provides 16 Single Pole Double Throw (SPDT) relays to drive 16 digital output lines. Each of relay channel can be used to control ON/OFF of external devices, to drive external high power relays, to activate alarms…etc. there are 16 LED indicators correspond to 16 relays, when relay is energized, the corresponding LED is light. The +12V power source is user selectable from internal PC bus or external power supplier.


The features of 16 Channel Relay Output Board are:

1.
Support 16 SPDT relay channels.
2.
LED indicates when relay is energized.
3.
Internal and external power selectable.
4.
Built in screw terminals for easy wiring.
5.
The Normal Open (NO), Normal Close (NC), and Common contacts (COM) of each relay are brought out to the screw connector.
6.
Max contract rating: 150V/DC 2amp, 125V/AC 2 amp.
7.
Breakdown voltage:AC/DC 500V minimum/
8.
Relay on time: 3 ms typical.
9.
Relay off time: 2 ms typical.
10.
Total switching time: 10 ms typical.
11.
Isolation resistance: 100 M OHM minimal.
12.
Life expectancy: 5 million operation at full load.
13.
Screw terminal: accept #22 to #12 awg wire.
14.
Power consumptio

+12V: 40mA for each relay, total 0.55 amp
for all relays are energized.
+5V : < 0.2 amp.
-12V: < 0.1 amp.



 
The package includes following item

The package contains:
1.16 Channel Relay Output board

2.One 26 pins flat cable.
3.User's manual.



HARDWARE CONFIGURATION
2.1 Configuration For Jumper
Before you use the 16 Channel Relay Output Board, you must ensure that the power supplier, jumpers, and connectors are set correctly. Observe the figure in the following, the proper settings for the 16 Channel Relay Output Board are described in the follows.

 Setting the threshold voltage of Photo Isolator, adjust VR which is on the PCB to get the desired threshold voltage. The external input voltage which is over the threshold voltage will be recognized as HIGH (1) and the relative led will be light. Otherwise that will be LOW (0) and led be off.


 

1.
Internal / external power selection.
 
 JP-1 is used to select internal or external power supply, when JP1-1 and JP1-2 is short; the power is supplied by PC bus. When JP1-2 and JP1-3 is short, external power supplier supplies the power. Suppose you connect more than two 16 Channel Relay Output Board, we suggest you use external power.


2.
 External power supplier

TB3 is used to connect +12V external power, the configuration is shown in the follows.



The input voltage is 12V (+/-) 1V, and the power consumption for each 16 Channel relay output Board is 0.55 amp


2.2 Signal Assignments

1. Signal assignment of 26 pins flat cable

The 26 pins flat cable connector is connected to digital output interface card such as: industry control, TTL I/O, 8255 I/O, connector is shown in the following.
Pin
Description
Pin
Description
No.

No.

1
+12V
14
I/O line 9
2
GND
15
I/O line 10
3
+12V
16
I/O line 11
4
GND
17
I/O line 12
5
I/O line 0
18
I/O line 13
6
I/O line 1
19
I/O line 14
7
I/O line 2
20
I/O line 15
8
I/O line 3
21
/CS1
9
I/O line 4
22
/CS2
10
I/O line 5
23
+5V
11
I/O line 6
24
GND
12
I/O line 7
25
-12V
13
I/O line 8
26
GND

2. Signal assignment of screw connector
The normal open, normal close, and common contacts signal of each relay are shown in the follows.  
Pin
Description
Description
1
NC01
NC09
2
NO01
NO09
3
COM01
COM09
4
NC02
NC010
5
NO02
NO010
6
COM02
COM010
7
NC03
NC011
8
NO03
NO011
9
COM03
COM011
10
NC04
NC012
11
NO04
NO012
12
COM04
COM012
13
NC05
NC013
14
NO05
NO013
15
COM05
COM013
16
NC06
NC014
17
NO06
NO014
18
COM06
COM014
19
NC07
NC015
20
NO07
NO015
21
COM07
COM015
22
NC08
NC016
23
NO08
NO016
24
COM08
COM016

2.3 Circuit Diagram of Each Relay
The pin assignment and circuit diagram or each relay is shown in the follows

Pin No.
Specification
1
+12V
2
COM
3
NC
4
NO
5
Led indication
6
Led indication
7
Led indication
8
GND

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