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NOTE:
Boards manufactured prior to
August, 1996 may not have a
built-in 5 VDC power supply to
power digital outputs. To
provide clean 5 VDC power for
digital output operation, use the
optional external power supply
board (part # 16418).
Boards manufactured after that
date (rev. 2.0 and higher) have a
5 VDC power supply available
on the main board at J4, pin 10.
NOTE:
For greater noise immunity, we
recommend that a separate 5
VDC power supply be used to
operate relays.
Figure 8-15. Mounting of 4-channel
relay racks on SS or HE panel
8-16
IQ plus 800/810 Installation Manual
4-CHANNEL AND 16-CHANNEL RELAY RACKS (IQ PLUS 810)
Relay racks may be mounted on standoffs or bolted to the main mounting
panel on IQ plus 810 models to allow the 5 VDC indicator signals to operate
AC or DC working voltages. This allows the indicator to control (or receive
input from) peripheral equipment operating at various voltages. Individu-
ally-fused input and output relays are designed to plug into either the 4-
channel rack or the 16-channel rack. The AC output relays are rated at 3 A
working voltage, with a 4A fuse. Both input and output relays are available
in either AC or DC voltage configuration. Each rack has a fuse tester for
troubleshooting, and one spare fuse.
A single 4-channel rack can be mounted in any of the IQ plus 810 models.
On the SS and HE models, the board is mounted in predrilled holes in the
panel holding the main CPU board. See Figure 8-15. On the Desktop model,
standoffs are furnished for mounting a relay rack off the main CPU board.
If more relays than will fit on a single 4-channel rack are desired, the use of
the optional 12 TTL Setpoint Output Expander Board is required. See page
8-22 for information on this option.
For an 8-channel system, two 4-channel racks can be mounted side by side
in either the SS or HE models as shown below.
The 16-channel rack mounts in same outer holes as those used for the 4-
channel racks in the SS and HE models. The Desktop model will not
accommodate the 16-channel rack.
Wiring connections will vary according to particular combination of
individual input and output relays chosen for the application. Sample wiring
diagrams in Figures 8-14 through 8-16 show the general principles.
9
8
7
Mounting holes for 16-channel relay rack
J4
CPU Board
J7
SW1
Mounting holes for
second 4-channel
relay rack
6
5
4
3
2
J1
A/D Converter
J2
J10
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