The PD1102 is a 2 relay option upgrade card for the ProVu series of digital panel meters.
ProVu Upgrade Card
The PD1103 is a 4-20 mA analog output option upgrade card for the ProVu series of digital panel meters.
The PD1104 is a 4 relay option upgrade card for the ProVu series of digital panel meters.
The PD1105 is a 2 relay and 4-20 mA analog output option upgrade card for the ProVu series of digital panel meters.
The PD1107 is a 4 relays and 4-20 mA analog output option upgrade card for the ProVu series of digital panel meters.