Measurement Computing CIO-DIO192 - Manual (Page 12)

CIO-DIO192 User's Guide Installing the CIO-DIO192
All the digital inputs and outputs are TTL. Under normal operating conditions, the voltages on the I/O pins
range from near 0 volts for the low state, to near 5 volts for the high state. The voltages and currents of external
devices usually exceed these values. Because of this, external relays are usually employed to handle higher
current and voltage loads.
In addition to load matching, digital signal sources often need to be filtered or "de-bounced". Refer to the Guide
to Signal Connections
for information on digital interfacing. This document is available at
www.mccdaq.com/signals/signals.pdf
Cabling
The red stripe
identifies pin # 1
50-pin Female
IDC connector 50-pin Female
IDC Connector
1 2
49 50
2
50
1
49
Figure 5. C50FF-x cable
Field wiring, signal termination, and conditioning
You can use the following cabling, screw termination, and signal conditioning products with the CIO-DIO192.
ƒ
CIO-TERM100 – 100-pin screw terminal board (daisy-chained 50-pin IDC connectors).
ƒ CIO-SPADE50 – 16" X 4" termination panel which mates with both 37-pin and 50-pin connectors.
ƒ CIO-MINI50 – 50-pin screw terminal board.
ƒ SSR-RACK24 – 24-channel, solid-state relay mounting rack for digital signal conditioning.
ƒ SSR-RACK48 – 48-channel, solid-state relay mounting rack with quad-format modules.
ƒ CIO-ERB24 – 24 Form C relays, 6 Amp relay accessory board for digital signal conditioning.
ƒ CIO-ERB48 – 48 Form C relays, 6 Amp, relay, 50-pin accessory board for digital signal conditioning.
Information on signal connections
General information regarding signal connection and configuration is available in the Guide to Signal
Connections
. This document is available on our web site at www.mccdaq.com/signals/signals.pdf .
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