Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Section 21. CHECKBACK ALARM CHASSIS
a. Front View
b. Rear View
RFL Electronics Inc.
Checkback Alarm Chassis
CHECKBACK ALARM TEST FAIL TEST FAIL TEST FAIL TEST FAIL TEST FAIL TEST FAIL TEST FAIL TEST FAIL T.I.P.
CHASSIS 1 2 3 4 5 6 7 8 NC NO C
J1 TB1 TB2 TB3
Figure 21-1. RFL 9785 Checkback Alarm Chassis, front and rear views
21.1 INTRODUCTION
The Checkback Alarm Chassis shown in Figure 21-1 allows a user to determine the results of
Checkback Tests. The terminals at the rear of the chassis indicate the status of each of the eight
Checkback Tests by means of a relay contact closure. There is one relay for each of the eight
Checkback Tests. Each relay has common, normally open and normally closed contacts. When a relay
is energized, its contacts close, thereby indicating a Checkback Test failure. See Section 16 for a
description of the eight Checkback Tests. The Checkback Alarm Chassis is a 1U high chassis, and
houses the RFL 9785 Checkback Alarm Board shown in Figure 21-2. When the Checkback Alarm
Chassis is used, a cable supplied with the chassis must be connected between the J1 connector, and a
mating connector on the 106635-X I/O module as shown in Section 19. A schematic diagram of the
Checkback Alarm Board is shown in Figure 21-2.
Table 21-1. Checkback Alarm Chassis, general information
RFL Part Number Nomenclature See Figure:
106650 9785 Checkback Alarm Chassis 21-1
106655 9785 Checkback Alarm Board 21-2
RFL 9785 RFL Electronics Inc.
April 25, 2005 21-1 (973) 334-3100
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