Lathem Time Clock LTR RSS User Manual

LTR-RSS  
REMOTE SCHEDULE  
SELECTOR and  
BELL RINGER  
Installation & User’s Guide  
 
OPERATION, INSTALLATION  
AND MAINTENANCE MANUAL  
“REMOTE SCHEDULE SELECTOR”  
and  
“BELL RINGER”  
LATHEM TIME CORP  
Doc #USG0026B  
“LTR8-512, LTR-RSS and “MasterLink”  
are Registered Trademarks of Lathem Time Corp., Atlanta,  
GA, USA  
©2004 LATHEM TIME CORP  
 
LTR-RSS User’s Guide  
Welcome to the LTR-RSS  
(Remote Schedule Selector/Bell Ringer)  
The “Remote Schedule Selector/Bell Ringer” for the LTR8-  
512 Master allows you to immediately activate any one (1) of  
the eight (8) possible schedules stored in the Master or  
deactivate all schedules. Your selection remains in effect until  
you make another schedule change (at the LTR-RSS, the  
MasterLink Software or the Master itself) or when a  
programmed schedule change occurs.  
The Remote Schedule Selector/Bell Ringer contains an  
electronic circuit attached to the back of a cover plate for a  
double-gang switch-type electrical box (not supplied). This  
circuit consists of a low-power microprocessor, a 4-screw  
terminal block and dip switches to select your Master’s  
‘address’ and baud rate. Two of the screws on the terminal  
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LTR-RSS User’s Guide  
block connect a twisted-pair (typically Cat-3) low-voltage  
cable to the Master’s RS-485 port, while the other two screws  
connect continuous 9-24V AC/DC power to the unit.  
Circuit Board  
D-  
D+  
~
~
1
2
3
4
5
6
7
8
B
A
64 32 16  
8
4
2
1
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LTR-RSS User’s Guide  
On the face of the cover plate, you will see a 10-position knob  
(to select which schedule you want active), a button to send  
your changes to the Master, and status lights which confirm  
that your changes occurred.  
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LTR-RSS User’s Guide  
Specifications  
Power Input:  
9-24V AC/DC, 1W max. For cable  
between the LTR-RSS and LTR8-512 less  
than 100 ft, power can be drawn from the  
12V output on the LTR8-512’s I/O  
connector. For longer cable, power should  
be drawn from a bell transformer or  
Lathem 24V power supply (typically a  
PS8-24). Low voltage wire is  
recommended  
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LTR-RSS User’s Guide  
Communications: EIA / IEEE RS-485 half-duplex requiring  
single twisted-pair (UTP or STP)  
communications cable (typically CAT-3  
or CAT-5). Max length 4000 ft. Can be  
included on LTR8-512’s RS-485 Host  
Communications Bus, along with other  
Lathem RS-485 devices  
Terminal Block:  
4-screw removable terminal plug supports  
both power (2-wire) andcommunications  
(2-wire) connections. Requires 3/32" flat-  
head screwdriver  
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LTR-RSS User’s Guide  
Mechanical:  
Circuit board is mounted to an industry-  
standard double-gang switch plate. Plate  
is screwed into standard double-gang  
flush-mount electrical box (typically  
Wire-Mold Part # V5747-2, not included).  
Connection of cables between electrical  
box and LTR8-512 or power source  
should be through conduit or other means  
approved by electrical / fire codes for  
low-voltage wire  
Environmental:  
Operation 0°-85°C (32°-185°F); 20-  
60% R.H., non-condensing  
6
 
LTR-RSS User’s Guide  
Installing the LTR-RSS  
To install the Remote Schedule Selector/Bell Ringer,  
Remove the LTR-RSS from its package and locate the dip  
switches (bottom center) on the back of the circuit board.  
Set the dip switches to  
match the Master’s  
address (default = 65)  
ON  
2400  
9600  
1 2 3 4 5 6 7  
8
and baud rate. (Press  
“*” at the Master to  
see its current address  
and baud rate).  
The legend on the circuit board will help you  
know which way to slide the dip switches. Use  
switch 1 to set the Baud Rate. Slide it down to  
choose 9600 baud (default) and up to select  
2400 baud.  
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LTR-RSS User’s Guide  
To select the address, use the numbers that add  
up to equal the number of your Master’s  
address, then slide those switches down. For  
example, the default address is 065: switch 2  
(value of 64) and switch 8 (value of 1) are  
down (64+1 = 65). For address 003, slide down  
switches 7 and 8 (2+1=3). For address 102,  
slide down switches 2, 3, 6 and 7  
(64+32+4+2=102).  
Locate the terminal block on the back of the  
circuit board (upper left). Attach the  
communication cable wire-pair (with proper  
polarity) to the top two screws on the terminal  
block. The top screw is Data - and the next one  
down is Data + .  
D-  
D+  
~
~
8
 
LTR-RSS User’s Guide  
Connect low-voltage power to the lower 2 screws on the  
terminal block. The LTR-RSS requires a voltage source of  
9 to 24 volts, AC or DC. If the distance between the  
LTR8-512 Master and the LTR-RSS is less than 100ft, you  
can use a 2nd twisted-pair in the cable to bring power from  
the Master Terminals # 12 and 13 (on the rear of the  
Master's Display Panel, providing 12vAC at 250mA). You  
should use a separate low-voltage power supply or  
transformer if the cable would be longer than 100 feet or  
placed in areas of electrical interference that can cause  
problems for the Master. You should also place an in-line  
250ma fuse on this connection.  
Secure the cover-plate to the electrical box with four 6-32  
FH screws.  
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LTR-RSS User’s Guide  
Wiring Diagram  
10  
 
LTR-RSS User’s Guide  
Install Diagram  
Cable Plug  
RS-485  
Cable  
Power Cable  
9-24 VAC  
11  
 
LTR-RSS User’s Guide  
Using the LTR-RSS  
When you make a schedule change, this change remains in  
effect until you make another change or when a programmed  
schedule change occurs. You can make schedule changes at  
the LTR-RSS, the MasterLink software or the Master itself.  
To deactivate all schedules:  
Turn the knob to the ALL OFF position.  
Push the ENTER SELECTION button. All LED’s will  
flash briefly and all schedules are deactivated.  
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LTR-RSS User’s Guide  
To activate a schedule:  
Turn the knob to choose which schedule you want to  
activate.  
After turning the knob, push the ENTER SELECTION  
button.  
The indicator (LED) will light to show which schedule is  
now active. The LED stays lit for five (5) seconds then  
turns off to conserve power.  
All schedules other than the one you chose are now  
deactivated.  
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LTR-RSS User’s Guide  
To manually ring all bells:  
Turn the knob to the RING BELLS position.  
Push the ENTER SELECTION button. All bell circuits  
will become active and will remain active for as long as  
you press the ENTER SELECTION button. Note: The  
bell circuits could remain active up to 2 seconds after  
releasing the ENTER SELECTION button.  
14  
 
Limited One-Year Limited Warranty  
Lathem warrants the hardware products described in this guide against defects  
in material and workmanship for a period of one year from date of original  
purchase from Lathem or from an authorized Lathem reseller. The conditions  
of this warranty and the extent of the responsibility of Lathem Time  
Corporation (“Lathem”) under this warranty are listed below.  
1. This warranty will become void when service performed by anyone  
other than an approved Lathem warranty service dealer results in  
damage to the product.  
2. This warranty does not apply to any product which has been subject to  
abuse, neglect, or accident, or which has had the serial number altered  
or removed, or which has been connected, installed, adjusted, or  
repaired other than in accordance with instructions furnished by  
Lathem.  
3. This warranty does not cover dealer labor cost for removing and  
reinstalling the machine for repair, or any expendable parts that are  
readily replaced due to normal use.  
4. The sole responsibility of Lathem under this warranty shall be limited to  
repair of this product, or replacement thereof, at the sole discretion of  
Lathem.  
5. If it becomes necessary to send the product or any defective part to  
Lathem or any authorized service dealer, the product must be shipped in  
 
its original carton or equivalent, fully insured with shipping charges  
prepaid. Lathem will not assume any responsibility for any loss or  
damage incurred in shipping.  
6. WARRANTY DISCLAIMER AND LIMITATION OF LIABILITY:  
Except only the limited express warranty set forth above, the products  
are sold with no expressed or implied warranties of any kind, and the  
implied warranties of merchantability and fitness for a particular  
purpose are hereby expressly disclaimed. No warranties are given with  
respect to products purchased other than from Lathem or an authorized  
Lathem reseller and any such products are purchased "as is, with all  
faults." In no event will Lathem be liable for any direct, indirect,  
special, incidental or consequential damages arising out of or in  
connection with the delivery, use or inability to use, or performance of  
this product. In the event any limited remedy given herein shall be  
deemed to have failed of its essential purpose, Lathem's maximum  
liability shall be to refund the purchase price upon return of the product.  
7. Proof of date of purchase from Lathem or an authorized Lathem reseller  
is required for warranty service on this product.  
8. This Warranty grants specific legal rights. Additional legal rights,  
which may vary by locale, may also apply.  
9. Should any difficulties arise with the performance of this product during  
warranty, or with any Lathem authorized service centers, contact  
Lathem Time at the address below.  
 
Lathem Time  
200 Selig Drive, SW, Atlanta, GA 30336  
404-691-0405  
Copyright © 2004 Lathem Time Corporation. All rights reserved.  
 

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