©Measurlogic
Page 15
MQ0051-20F
7334 S. Alton Way, Centennial CO 80112
Tel: 877-777-6567 Tel: 303-805-5252 Fax: 425-799-4780
e-mail: [email protected]
web: www.measurlogic.com
3.5
DTS SMX Digital I/O Circuit (Optional)
The DTS SMX has 3 pairs of terminals on the bottom of the door-mounted display
circuit board which are dedicated to digital inputs and outputs. These terminals
support multiple hardware configurations, depending on the model ordered.
I/O Ordering
Option
DIGITAL I/O
PULSE OUT
Ch1
Ch2
Ch3
-P
---
---
Output
-A
Input
Input
Output
-3
Output
Output
Output
-1
Input
Input
---
-N
---
---
---
3.5.1
Digital Outputs
•
The DTS digital outputs are potential-free solid state N.O. relays that can be
configured using DTS Config for energy pulses or threshold triggers.
•
Ch3
(marked
“PULSE OUT” on the silkscreen)
on the SMX is dedicated to the
meter’s
kWh pulse output. See Section 5.3.2 for the pulse rate settings
(Switches 2.1 and 2.2).
•
Other digital outputs (if fitted) may be used for pulsing or threshold triggers.
•
Suitable wire gauge for digital outputs is 18-22 AWG. For longer distances (>100ft) use 18 AWG.
3.5.2
Digital Inputs
•
The DTS digital inputs on Ch1 and Ch2
(
marked “DIGITAL I/O” on the
silkscreen)
accept dry contacts or NPN
open collector inputs and can be configured using DTS Config as level status inputs and/or linked to a
General Counter for input pulse counting.
•
Suitable wire gauge for digital inputs is 18-22 AWG. For longer distances (>100ft) use 18 AWG.
4
Maintenance and Service
WARNING
Make sure to disconnect power to the DTS SMX prior to changing the battery or voltage
fuses. Failure to do so may result in electric shock or arc risk.
The only user serviceable parts inside the DTS SMX are the voltage fuses and coin cell battery. The detailed parts
specifications and replacement procedures can be found in sections 4.1 and 4.2.
There are NO other user serviceable parts in the DTS SMX, and no regular maintenance is required.
If additional maintenance is needed, please contact Measurlogic Inc.
Digital I/O Ch1-Ch3
(left to right)
Counter / digital input
module