3
I N S T A L L A T I O N
WIRING
REAR TERMINAL CONNECTIONS
Terminals 11 & 15 are not used.
Count Inputs
Terminal #2 is the connection for Input A, which is programmable to
be the rate channel and total. Terminal #1 is the connection for
Input B, which is programmable to be an incrementing input, a
decrementing input, or channel B of encoder input. Input B cannot
be used for rate - it only serves as a secondary input for total. The
common connection for both Input A and Input B is Terminal #3.
Control/Digital Inputs
A contact closure or NPN signal can be used to activate
preconfigured functionality. Terminal # 5 is used for a remote reset
function, while Terminal #6 is a security function, that when active,
will prohibit entry into Program Mode. Termina l #8 serves
as the common for both of these inputs.
Auxiliary Power Output
A 9 - 15 VDC for powering external sensors and encoders up to 125
mA can be accessed by connecting the positive supply side of the
sensor to Terminal #4 and the negative side to Terminal #8.
Linear Output
An option board may be installed that provides a 10 bit linear output
signal relative to the Rate Value. Terminal #12 is the positive side of
the connection, and Terminal #10 is the negative side. The default
range of the output is 4-20 mA, but can be changed via the front
panel to 0-20 mA, 0-10 VDC, 2-10 VDC, 0-5 VDC, or 1-5 VDC.
Input Power
For an AC powered unit, Terminal #13 serves as the
line or Hot side connection for AC powered units and
as the positive side for DC powered units. The
neutral side for AC powered units and the negative
side for DC powered units are connected to Terminal
#14.
Transistor Outputs
Your unit comes standard with 2 NPN outputs which are activated by
each of the alarms. Transistor Output 1, which is tied to the High
Alarm Value, is on Terminal #7. Transistor Output 2, which is tied
to the Low Alarm Value, is on Terminal #9. Terminal #8 serves as
the common connection for both transistor outputs.
Relay Outputs
Your unit comes standard with a relay output which is tied to the
High Alarm Value. Terminal #19 is NC, Terminal #20 is common,
and Terminal #21 is NO. A second relay output tied to the Low
Alarm Value can be added as an option at the time of order or later
installed in the field. Terminal #22 is NC, Terminal #23 is common,
and Terminal #24 is NO.
Serial Communication
An RS-485 communication board, utilizing ASCII protocol, can be
installed as an option. Terminals #16 & #17 serve as the B and A
connections respectively, while Terminal #18 is connected as the
common.
2
3
4
5
6
7
8
24
23
22
14 15 16 17 18 19 20
10
1
1
12
B A
COM
Power Supply
+ VDC -
RS-485 Comm.
(opt.)
Input B
Input A
Input Common
Aux. Power
(opt.)
Digital In 1 (rem. reset)
Digital In 2
(sec. lockout)
Common
+
-
Linear
Output
(opt.)
Relay 2
(opt.)
Relay 1
NPN Out 1
(HI)
NPN Out 2
(LO)
