Specifications

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SLC 500 Programmable Controllers and I/O Modules
Specifications
Description Specification
Inputs 1 count input 5V, 12V, or 24V dc
Max. Input Frequency 50 KHz for range, 32 KHz for rate, 50 KHz for sequencer
Max. Counts 16-bit, ±32,768
Outputs 4 open-collector outputs: 5V, 12V, or 24V dc; Maximum current: 125mA at 30˚C
Module Update Time Range Mode: 3.9 ms; Rate Mode: 70 ms + rate; Sequencer Mode: 1.8 ms
Backplane Current draw 32 mA at 5V dc
1746-HSCE2 Multiple Channel High-Speed Counter and Encoder Module
The 1746-HSCE2 is a 24-bit high-speed, multi-channel counter that directly interfaces with incremental
encoders and other high-speed input sensors. The module accepts bi-directional input pulse frequencies of
up to 1 MHz. For faster throughput time, the module has four on-board outputs that are controlled
independently of the output scan. The status of four “soft outputs” can also be made available to
the SLC backplane for control of additional outputs.
The module supports three operating modes that provide two-, three-, or four-channel operation. It is
configurable for up to two quadrature encoder inputs and up to four pulse inputs. System performance
is enhanced with the module’s ability to accept control adjustments while it is actively counting pulses.
In addition to monitoring an encoder market pulse, the Z/gate input channel can be used for storing,
holding, and resetting count data.
Features
• High-speed counting applications — Frequency response up to 1 MHz and 24-bit count capability.
• Configuration for ring or linear counting, rate calculation, output control by count range, output control by rate range,
and pulse gating.
• Configuration flexibility — Easy-to-use bit configuration tables allow the user to choose the counter functionality
best suited for the application
• Suitable for remote applications
Specifications
Description Specification
Inputs 2 sets of ±A, ±B, ±Z inputs; interface capability for 2 quadrature encoders or 4 pulse inputs;
differential or single-ended
4.2 to 12V dc, 10 to 30V dc; jumper selectable for each A, B, Z channel
Frequency Response 250 KHz at X4, 500 KHz at X2, 1 MHz for all other
Max. Counts ±8,388,607 (24-bit) with SLC 5/03 and higher processors, or 1747-ACN15/-ACNR15 remote
chassis (Class 4) ±32,768 (16-bit) with SLC 5/01, 5/02, and 1747-ASB in remote chassis (Class 1)
Outputs 4 outputs, 24V dc. Max. current 1A at 40˚C
I/O Throughput to Backplane 300 to 1500 µs: 700 µs typical
and On-board Outputs
Backplane Current draw 250 mA at 5V dc