To allow the incubator and the 1535 to communicate, an
address must be allocated on the 1535. Refer to Section 5.8 of
the 1535 operating manual. The same address number must be
assigned to the incubator. Refer to Section 4.1p of this manual.
c. Connecting the Analog Output Boards (191761,
191762, 191763)
The electronics section contains hazardous volt-
ages. Only qualified personnel should access this
area.
The analog output board is an option that allows the incu-
bator to output analog signals representing the air temperature
of the cabinet, CO
2
content, and relative humidity, depending
upon which systems are in the incubator. There are three differ-
ent analog output board options available : 0-1V, 0-5V, or 4-
20mA signals. Negative display readings will output 0V. The
outputs do not have isolated grounds. Refer to Table 9-1 for
output specifications of the three boards.
For the 0-1V and 0-5V boards, the recording device must
supply a load > 1000 ohm. For the 4-20mA board, the recorder
must supply a load of < 100 ohm.
To wire in the analog output board, use a shielded 22
gauge, 3-conductor wire (P/N 73041), maximum length 50 ft
(15.2m). This wire is readily available from other vendors
including Alpha P/N 2403 and Deerborn P/N 972203.
Accuracy of the output at the board terminal strip
to the incubator display is ±1 unit. There is no cal-
ibration from the incubator. Calibration to the
incubator display must be at the instrument con-
nected to the output board.
Section 9 - Factory Options
9.1 Connections to External Equipment
a. Connecting the Remote Alarm Contacts
A set of relay contacts is provided to monitor alarms
through an RJ11 telephone style connector on the back of the
cabinet. Refer to Figure 9-2 for the location of the alarm con-
nector. The 12-foot telephone cord (P/N 190388) and RJ11-to-
screw terminal conversion box (190392) are available through
our service department.
The remote alarm provides a NO (normally open) output,
an NC (normally closed) output and COM (common). Refer to
Figure 9-1.
The contacts will trip on a power outage or a temperature
controller failure. The contacts may also be programmed to trip
or not trip on temperature alarms, CO
2
alarms, and RH alarms.
See Section 4, Configuration.
Figure 9-1
b. Connecting the RS485 Interface (1900152)
All Steri-Cult incubator
models can be purchased
with the RS485 communi-
cations option. This option
allows the incubator to be
directly connected to a
Model 1535 alarm system
without the use of a com-
munications module. A
junction box is provided
with each RS485 option.
See Figure 9-3 for wiring
details. Figure 9-2 shows
the location of the RS485
connector on the back of
the incubator cabinet.
Steri-Cult Incubator __________________________________________________________________Factory Options
9 - 1
Figure 9-3
Figure 9-2
