Bell & Gossett S12596B Technologic 350 Pump Controller - Manual (Page 16)

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6.9
READ ONLY – Digital Inputs
6.9.1 To Enter – press CLEAR key twice and then press
SERVICE TEST key once only while in normal scroll.
6.9.2 Display – numbers 1 through 12 (implied) on the top
line and status on the second line. Status is dis-
played as a “1” for signal on and “0” for signal off.
6.9.3 Interpretation – compare the status shown to the fol-
lowing terminals and the wiring diagram. For example,
starter 1M “on” signal at J4 4 and 8 is display No. 3
and should be a “1” if the 1M starter is energized.
Input
Input J4 Input No.
Signal Terminals On Display
Local ** 1 to 2 1
Remote 3 to 2 2
1M 4 to 5 3
2M 6 to 5 4
3M 7 to 8 5
* DP1 9 to 8 6
* DP2 10 to 11 7
* DP3 12 to 11 8
* 7 Day Timer 19 to 20 13
* *Optional
**This input is also used for remote start when the selector switch is in the
REMOTE position.
NOTE: Terminal No’s. on the right , e.g. 2, 5, 8, etc. are all in common.
6.9.4 Corrective Action – compare the inputs to the
device/s connected to the digital inputs and trigger
same. If a “1” is not received check the associated
wiring or the particular device and correct or replace
the cause of the fault.
6.9.5 Controller Operation – the keyboard (except the
CLEAR key) and all LED’s cannot change state. The
display is dedicated to the digital input display. The
program is otherwise active.
6.9.6 Exit – press CLEAR twice and then press ENTER
twice.
6.10 READ ONLY ANALOG INPUTS
6.10.1 To enter (from normal scroll) – press CLEAR key twice
and press SERVICE TEST key once. Then press
CLEAR key once.
6.10.2 Display –
ANALOG INPUT TEST on top line and input
type and measurement on bottom line. Press key 1, 2,
3 or 4 to read channels 1, 2, 3 or 4 in % with 4mA @
20% and 20mA at 100%. Six other items may be
accessed with the up arrow key. These items are:
RTD 1(°F), RTD 2(°F), DC supply (DCV), and power
board readings. “Power Board Readings” is now dis-
played on top line. These readings are: voltage in
volts, current in amps, and power in watts.
6.10.3 Interruption – read channel values from connected
devices with channel 1 as 1PT pressure, channel 2 as
2PT pressure, channel 3 as flow input (optional) and
channel 4 is temperature input (optional).
If there is a problem replace the analog source with a
known source such as a 20mA signal generator.
Connections to terminal block J3 are as follows:
Source 2 Wire
*Step Signal Input Terms Terms
1 1PT 1 1-, 2+ 2-, 3+
2 2PT 2 5-, 6+ 6-, 3+
3 Flow (1FT) 3 7-, 8+ 8-, 9+
Polarity shown is that of the signal analyzer and not the
markings on the I/O board.
4 Temp (AI-4) 4 11, 12 9, 12
5 T-1 RTD in 1 - 13, 14
6 T-2 RTD in 2 - 16, 17
A substitute 100 OHM resistor @ terms. 13 & 14, or 16
& 17 will result in a temperature reading of 32°F.
7 DC Supply = 24.00 VDC ±10% is satisfactory.
8 Display top line changes to: Power Board
Readings.
8 Voltage = XXX VAC equal to system line voltage.
9 Current = XXX amps equal to actual load.
10 Power = XXX watts actual power.
*Step = each momentary step of up arrow key.
6.10.4 Corrective Action – correct the wiring or a faulty
device. If a signal is good with a signal generator then
the inter-connection wires are good and the sensor is
bad. In the case of RTD’s a substitute 100 OHM resis-
tor will isolate a problem to the sensor.
Power board readings may be confirmed by a sepa-
rate clamp-on line current readings, line voltage read-
ing, and calculations for watts.
WARNING: Prevent electrical shock. Disconnect the
power supply before beginning installation.
Failure to
follow these instructions could result in serious per-
sonal injury, death, and/or property damage.
DANGER: Troubleshooting live control panels ex-
poses personnel to hazardous voltages. Electrical
troubleshooting must only be done by a qualified electri-
cian.
Failure to follow these instructions could result
in serious personal injury, death, and/or property
damage.