1 introduction, Warning – Measurement Computing CIO-RELAY08 User Manual
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1 INTRODUCTION
The CIO-RELAY16 is a 16- channel relay interface board f or ISA bus computers.
The board prov ides 16, Form-C (SPDT) relays. The CIO-RELAY08 board i s
identical to the RELAY16 board ex cept that only eight relays are installed. The
CIO-RELAY32 is two CIO-RELAY16s on a single board while the CIO-RELAY24
is a CIO-RELAY32 with only 24 relays installed.
The /M versions (e. g. CIO-RELAY16/M or CIO-RELAY08/M) are identical to the
standard versions, but use Mercury wetted relays. They offer quicker switching
times, less contact bounce and lower on-resistance than the standard models. The
CIO-RELAY16 family has been designed for control applications where a f ew
points of high voltage (or current) need to be controlled.
WARNING!
High voltages will be pr esent on the CIO-RELAY16 family boar ds when high
voltage is connected to the C IO-RELAY16 connector. Use extreme caution! N ever
handle the CIO-RELAY16 when signals are connected to the board through the
connector.
DO NOT REMOVE THE PROTECTIVE PLATES FROM THE CIO-RELAY16!
The CIO-RELAY16 family are d igital I/O b oards with relay-based signal
conditioning installed. Most accessory boards are intended to provide signal
conditioning or easy to access signal termination. In general, the CIO-RELAY16
will not require additional signal conditioning.
WARNING
We STRONGLY recommend that under no circumstance should a screw terminal
board be used to connect high vo ltages to the CIO-RELAY16 series board. The
CIO-RELAY16 is intended to control high voltages. If you use a screw terminal
board you will expose yourself and others to those high voltage signals.
We recommend that you construct a safe cable to carry your signals directly from
your equipment to the CIO-RELAY16 connector.
NOTE:
The Mercury wetted boards must be mounted in the computer such that they
will remain within 30 degrees of vertical.
Installation of these boards in most tower computer cases will require the tower be
rested on its side for proper operation of the mercury relays.
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