P
RO
V
U
PD6210 Analog Input Batch Controller Instruction Manual
35
Automatic Reset (
Auto
)
In this application, the controller is set up for automatic reset
(non-latching relay). Acknowledging the alarm while it is still
present has no effect on either the LED or the relay. When the
alarm finally goes away, the relay automatically resets and the
LED also goes off.
Pump Alternation Control
Pump alternation control is not recommended when using this controller for batch control, as it is used
only in level applications, and not with rate, total, or batching applications. For information on using pump
alternation control for level, see the PD6200 and PD6300 instruction manuals available at
www.predig.com.
Setting Up the Interlock Relay (Force On) Feature
Relays 1-4 can be set up as interlock relays. To set up the relays for the interlock feature:
1. Access the
Setup
–
Relay
–
Action
menu and set the action to off.
2. In the Advanced features –
User
menu program any of the digital inputs to Force On any of the
internal relays (1-4).
3. Connect a switch or dry contact between the +5V terminal and the corresponding digital input (dI-1 to
dI-4) terminal.
Interlock Relay Operation Example
Relays 3 & 4 are configured to energize (their front panel LEDs are off) when SW1 & SW2 switches
(above) are closed. If the contacts to these digital inputs are opened, the corresponding front panel LEDs
flash indicating this condition. The processes being controlled by the interlock relay will stop, and will re-
start only after the interlock relay is re-activated by the digital inputs (switches).
1
2
3
4
5
6
+5
I1
I2
I3
I4
O1
7
8
O2
O3
9
10
O4
G
DI 1-4
DO 1-4
5 VDC
GND
SW2
SW1
Automatic reset only
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Ack (No effect)
On
On
Normal
Off
Off
