Supplementary Devices 6
Shield Fire, Safety and Security Ltd.
Shield A-XT Releasing Fire Control Panel - Installation and Operation Manual SEXTCP-OM
Revision E01.00
59 of 127
Two 6.8 K Ohm EOL resistors, SEOLR-6.8 and two 470 Ohm series-resistors, SEOLR-470 are supplied with each
Status Unit assembly. The 6.8 K Ohm EOL resistors, SEOLR-6.8 are connected to the Hold input terminals during the
shipping process. The 470 Ohm series-resistors, SEOLR-470 are provided in an accessory-bag included with the status
unit packaging.
Reference Abort switch S111R-AB or equivalent.
Mode Input
The Mode input is unused on the Status Unit and is designated as a No Connect (NC) terminal.
Hold Input
Abort connections on the Status Unit are labeled Hold. Hold and Abort functions are identical.
Reference Section 4, Programming and Operating for a complete description of the abort function.
Mode Select Key Switch
Certain models of the status unit have a Mode select key-switch. The key can only be removed in the “Automatic and
Manual” position. The system is placed in manual only mode when any mode input is activated regardless of the status
of other mode inputs. Therefore, all mode inputs must be inactive for the system to be in Automatic or Manual Mode.
The system can include the Shield A-XT Releasing Fire Control Panel, IDCs, Status Units and Ancillary Boards.
LED indicators on the front-panel of the Status Unit illuminate when the key-switch is in the “Automatic and Manual
Only” or “Manual Only” position.
Ancillary Board
The ancillary board provides additional outputs and voltage free contacts for operating with the Shield A-XT
Releasing Fire Control Panel. The Ancillary board is compatible with all models of the Shield A-XT Releasing
Fire Control Panel. Up to 7 ancillary boards can be connected to a fire control panel and each is allocated an address
from 1 to 7 using a binary coded DIL switch.
The ancillary board is intended to provide additional signalling and control for the Shield A-XT Releasing Fire
Control Panel only.
The ancillary board requires a data connection and 24 VDC to operate. Status Units can also be powered by the AUX
24V output or an auxiliary 24 VDC source that is listed for Fire Applications with Regulated and Power Limited
Outputs. The maximum line impedance is 120 Ohms.
The J2 Jumper Connection
Ancillary Boards contain a push-on-jumper at PCB location J2. The J2 jumper is located on the left-side of the
Ancillary Board PCB. The J2 jumper is a terminating resistor for establishing the end of the data line. Connect the J2
jumper to the last Ancillary Board when multiple Status Units are connected in a data line. Connect J2 jumper when
operating one Ancillary Board.
A common earth ground is required between all Status Units and each fire control panel.
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