Standard Relay Interface Modules have three types 1 C/O, 2 C/O & 1C/O with Fuse as follows.

1. Standard Relay Interface Module 1 C/O

              SRL21CO                                                      SRL41CO                                                      SRL81CO

Features:

• LED & Freewheeling diode across coil.
• Reverse polarity blocking diode.
• Common negative

Notes:

• Output Indications:
  O: NO (Normally Open)
  P: Common
  C: NC (Normally Closed)

   
  Specifications:

2. Standard Relay Interface Module with Fuse 1 C/O 

               SRL21COF                                                         SRL41COF                                                             SRL81COF

  Features:

• LED & Freewheeling diode across coil.
• Reverse polarity blocking diode.
• Common negative
• Fuse at Pole

Notes:

• Output Indications:
  O: NO (Normally Open)
  P: Common
  C: NC (Normally Closed)

   
  Specifications:

 3. Standard Relay Interface Module 2 C/O 

               SRL22CO                                                      SRL42CO                                                       SRL82CO

 Features:

• LED & Freewheeling diode across coil.
• Reverse polarity blocking diode.
• Common negative

Notes:

• Output Indications:
  O: NO (Normally Open)
  P: Common
  C: NC (Normally Closed)

   
  Specifications: