Manual
S320 INTERFACE RELAY
This is a transistorised single pole relay. Its main 
application is one of providing a voltage free 
changeover contact on application of a voltage 
input. 
12 volts dc should be applied to the terminals 
marked +ve and -ve at all times. The relay will 
energise when a +ve voltage of between 3 and 
30vdc is applied between -ve and the signal input.
The output contacts are rated at 1A at 30vdc 
resistive.
The relay coil of the S320 is fitted with a back e.m.f 
diode to prevent damage to associated circuitry.
IMPORTANT.  Under  no  circumstances  should 
the  S320  be  used  to  switch  high  voltages  ie 
voltages above 50VDC 
S320 INTERFACE RELAY
This is a transistorised single pole relay. Its main 
application is one of providing a voltage free 
changeover contact on application of a voltage 
input. 
12 volts dc should be applied to the terminals 
marked +ve and -ve at all times. The relay will 
energise when a +ve voltage of between 3 and 
30vdc is applied between -ve and the signal input.
The output contacts are rated at 1A at 30vdc 
resistive.
The relay coil of the S320 is fitted with a back e.m.f 
diode to prevent damage to associated circuitry.
IMPORTANT.  Under  no  circumstances  should 
the  S320  be  used  to  switch  high  voltages  ie 
voltages above 50VDC 
S320 INTERFACE RELAY
This is a transistorised single pole relay. Its main 
application is one of providing a voltage free 
changeover contact on application of a voltage 
input. 
12 volts dc should be applied to the terminals 
marked +ve and -ve at all times. The relay will 
energise when a +ve voltage of between 3 and 
30vdc is applied between -ve and the signal input.
The output contacts are rated at 1A at 30vdc 
resistive.
The relay coil of the S320 is fitted with a back e.m.f 
diode to prevent damage to associated circuitry.
IMPORTANT.  Under  no  circumstances  should 
the  S320  be  used  to  switch  high  voltages  ie 
voltages above 50VDC 
S320 INTERFACE RELAY
This is a transistorised single pole relay. Its main 
application is one of providing a voltage free 
changeover contact on application of a voltage 
input. 
12 volts dc should be applied to the terminals 
marked +ve and -ve at all times. The relay will 
energise when a +ve voltage of between 3 and 
30vdc is applied between -ve and the signal input.
The output contacts are rated at 1A at 30vdc 
resistive.
The relay coil of the S320 is fitted with a back e.m.f 
diode to prevent damage to associated circuitry.
IMPORTANT.  Under  no  circumstances  should 
the  S320  be  used  to  switch  high  voltages  ie 
voltages above 50VDC 
Dimensions
47W X 20D X 15H
Dimensions
47W X 20D X 15H
Dimensions
47W X 20D X 15H
Dimensions
47W X 20D X 15H
60017:4 Iss 1
60017:4 Iss 1
60017:4 Iss 1
60017:4 Iss 1
T. 01744 886600 F. 01744 886607 E. sales@hoyles.com W. www.hoyles.com
Hoyles Electronic Developments Ltd
T. 01744 886600 F. 01744 886607 E. sales@hoyles.com W. www.hoyles.com
Hoyles Electronic Developments Ltd
T. 01744 886600 F. 01744 886607 E. sales@hoyles.com W. www.hoyles.com
Hoyles Electronic Developments Ltd
T. 01744 886600 F. 01744 886607 E. sales@hoyles.com W. www.hoyles.com
Hoyles Electronic Developments Ltd

