Discrete Input 24 VDC Signal Conditioning Card for 1771 I/O

Installation notes

The Discrete Input 24 VDC Signal Conditioning Card for 1771 I/O provides an interface between 1771 I/O and simplex or redundant Series 2 Plus DI, 32-Channel, 24 VDC, Dry Contact cards. Two Discrete Input 24 VDC Signal Conditioning Cards for 1771 I/O are required to connect to all 32 channels of one Series 2 Plus DI, 32-Channel, 24 VDC, Dry Contact card.
The swing-arm attachment point on the front of the card provides secure mechanical and electrical connections for a 1771-WH swing arm.
The 20-pin ribbon-cable connector on the bottom of the card provides connections for a simplex or redundant Discrete Input 40-Pin Plus Mass Termination Block, which is required to connect to a simplex or redundant Series 2 Plus DI, 32-Channel, 24 VDC, Dry Contact card.
Up to 16 discrete output, 24 VDC-based field devices can be connected to the swing-arm screw terminals.

Table: Discrete Input 24 VDC Signal Conditioning Card for 1771 I/O specifications
Item	Specification
Field device type	24 VDC dry contact
Number of channels	16
Isolation	No channel-to-channel isolation
Electrical connections	Front: one 1771-WH swing arm Bottom: one 20-pin ribbon-cable connector
Nominal input current	4.5 mA at 10 VDC 15 mA at 30 VDC
Minimum ON-state voltage	10 VDC
Minimum OFF-state voltage	5 VDC
Input voltage range	10-30 VDC
Maximum nominal input impedance	2.2 kΩ
Dimensions	Height: 208 mm (8.2 in.) Width: 32 mm (1.3 in.) Depth: 168 mm (6.6 in.)
Operating temperature range	-40 to 60 °C
Storage temperature range	-40 to 85 °C
Relative humidity range	5 to 95% non-condensing
Protection from airborne contaminants	ISA-S71.04-1985 Airborne Contaminants Class G3 conformal coating
Protection rating	IP 20
Shock	10 g, 1/2-sine wave for 11 ms
Vibration	1 mm peak-to-peak from 2 to 13.2 Hz, 0.7 g from 13.2 to 150 Hz