Description
The 2588-8 8-Point Universal Discrete Input Module
accepts a wide range of voltage signals. It is de-
signed to accept both AC and DC voltage allowing
the user to pick and choose ranges on a single
module. The 2588-8 can replace Siemens® 8 point
input products with no rewiring. Motor centers,
optical sensors, limit switches and utility control are
excellent examples of applications for this product.

Features
• CTI 2500 Series® or Simatic® 505 base format
• 8 universal input points
• Replaces Siemens® 505-4008-A, 4208-A, 4308.
and 4408-A with no rewiring
Product Bulletin
• 1500V channel-to-PLC backplane and group-to
group isolation
• Wide 11V to 220V AC/DC range (selectable by
group)
• Isolation in groups of 2
• Sourcing or sinking inputs
• Single-wide module
Specifications
Inputs per Module: 8
Isolation:
1500 VDC channel-to-backplane
1500 VDC group-to-group
Input Voltage:
Range Setting
Classic
Operating Range
12/24V range 11 - 30 volts
48V range
110V range
220V range
164 - 240 volts
Input Current:
AC: 2.1 - 3.6 mA
DC: 2.5 - 4.3 mA
Operating Characteristics for Typical Input:
AC Voltage Input:
Turn ON Time: 4.0mS
Turn OFF Time: 15.0mS
DC Voltage Input:
Turn ON Time: 1.0mS
Turn OFF Time: 15.0mS
Connector: Removable
Wire Gauge: 14 - 22 AWG
Backplane Power: 1.8 Watts max.
Module Size: Single-wide
Shipping Weight: 1.5 lb. (0.68 Kg)
Additional Product Information:
On CTI’s Website you will find links to the 2500 Series
Standard Environmental Specifications and the UL
Agency Certificates of Compliance .
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